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EHD electrohydrodynamic

The electrohydrodynamic (EHD) flowmeter is based on measuring the transition behavior of the current when a voltage is applied between two electrodes in a liquid flow. The transient current shows one or more cusps, and the time at which these occur can be correlated with the flow velocity The ElectroHydroDynamic (EHD) fluids experiment participated in flight week in Orlando Florida on the Zero-g reduced gravity aircraft. The Zero-g flight week operations were conducted on November 18-22, 2019. The EHD experiment reduced gravity rig operated and gathered data on 120 flight parabolas during the week This paper mainly reviews the designs of electrohydrodynamic (EHD) inkjet printing machine and related applications. The review introduces the features of EHD printing and its possible research directions. Significant progress has been identified in research and development of EHD high-resolution pr EHD. Post author By EHD; Post date July 17, 2021; No Comments on EHD; Sticky post Tags Electrohydrodynamic Drying.

Electrohydrodynamics - an overview ScienceDirect Topic

The Electrohydrodynamic (EHD) pumps is a type of non-mechanical pumps which induce dielectric fluid under a high voltage electric field by injection or generation of ions in the vicinity of.. An ion-propelled aircraft or ionocraft is an aircraft that uses electrohydrodynamics (EHD) to provide lift or thrust in the air without requiring combustion or moving parts. Current designs do not produce sufficient thrust for manned flight or useful loads Electrohydrodynamic (EHD) cooled laptop. Abstract: Forced air cooling with rotary fans is the most popular cooling solution for electronic products. However, increasing heat generation in microelectronics, and the demand for ever smaller portable devices, has resulted in heat fluxes and form-factors that push the limits of conventional rotary. In this work, the electrohydrodynamic (EHD) instability induced by a unipolar charge injection is extended from a single-phase dielectric liquid to a two-phase system that consists of a liquid-air. Electrohydrodynamic (EHD) printing provides higher resolution than standard printing techniques such as inkjet printing

In order to explore and investigate the new method of drying Chinese wolfberry fruits, electrohydrodynamic (EHD) drying system was used to drying for Chinese wolfberry fruits with a multiple needle-to-plate electrode on five levels alternating voltage at 0, 20, 24, 28 and 32 kV and a multiple needle-to-plate electrode on a level direct voltage at 28 kV Electrohydrodynamic (EHD) printing provides higher resolution than customary printing techniques like ink jet printing. The upper resolution is achieved by using totally different methodology to make drop. It is obtainable by applying electric field between miniature nozzle (inner diameter between ~100 nm to several μm) and substrate Electrohydrodynamic jet (e-jet) printing is a high resolution printing technology where the printed liquid is driven by an electric field. Exposure to an electric field causes mobile ions in a polarizable liquid to accumulate at the liquid surface Electrohydrodynamic (EHD) conduction pumping relies on the interaction between electric fields and dissociated charges in dielectric fluids. EHD pumps are small, have no moving parts and offer superior performance for heat transport. These pumps are therefore able t Liquid film flow boiling driven by electrohydrodynamic (EHD) conduction pumping has been experimentally studied previously in a terrestrial environment [ 3] (including studies of bare and nanofiber-enhanced heater surfaces [ 4 ]) as well as in a microgravity environment [ 5 ]

EHD Glenn Research Center NAS

  1. drops produced by an electrohydrodynamic EHD mecha-nism. We are particularly interested in single-particle ma-nipulation, the achievement of which enables a drop-and-place paradigm for manufacturing micro- and nanostructures. Our EHD approach takes advantage of the large neck-down ratio of the EHD cone-jet configuration which enables th
  2. This paper presents the thrust optimization of Electro-hyrdodynamic (EHD) thrustersthrough theoretical, experimental, and simulation approaches. The underlying forceproduction theory is explained with electrical concepts, such as corona discharge, electrodepolarity, Corona Inception Voltage (CIV), and air breakdown principles. These concepts areapplied to the development of the theoretical.
  3. Nano silver ink is used for EHD (Electrohydrodynamic) printing.The droplet size is less than 5 um and conductive line width is less than 7um in case of using..
  4. The proper name for ionic wind is ElectroHydroDynamic (EHD) thrust. It's been known since the 18th century that electricity can kick up a tiny air movement, but it wasn't until the 1960s.
  5. Electrohydrodynamic (EHD) jet printing with a circulating dual-channel nozzle - IOPscience This site uses cookies. By continuing to use this site you agree to our use of cookies
  6. Here we present a novel strategy to produce multiscale conductive scaffolds with layer-specific fiber orientations for cardiac regeneration by combining solution-based and melt-based electrohydrodynamic (EHD) printing techniques

EHD (Electrohydrodynamic) printing is a photomask-free and direct writing technique for alternative fabrication of high resolution micro- and nano-structures with low cost and simple equipment. It is critical to understand the motion trajectory of the ejected droplet under electric filed so as to precisely control the printing process Electrohydrodynamic (EHD) printing has great potential to be used in the field of electronic industry, precision optics and biological engineering. However, it is still a challenge to achieve a high scaling ratio for line patterns production by EHD jet printing technique, which can effectively prevent the needles to be blocked

Beating the Heat in Space. WPI researchers are developing an electrohydrodynamic pump that can cool high-powered electronics in space. The technology is slated to be tested on the International Space Station. January 12, 2017. Jamal Yagoobi, left, floats beside a prototype of the EHD. pump during a test on the Vomit Comet Electrohydrodynamic (EHD) micropumps are particularly appealing for microelectronics cooling as they operate with no moving parts, are easily controllable and can be configured with low-form factors. Stuetzer ( 1959 ) first showed that high electric fields can cause flow of ions, and thus fluid flow from one electrode to another The main objective pursued in this paper is to investigate the single layer drying behavior of fishslices experimentally in an electrohydrodynamic (EHD) dryer and also to perform mathematical modeling. Drying experiments of fish slices were studied at 10, 15, 20, 25 and 30 C, relative humidity of 30%, 40%, 50%, 60% and 70%, drying voltage from 5 kV to a maximum voltage of 50 kV in increments. Electrohydrodynamic Pumping Experiment (EHD) For information, contact: Project Manager - Jeff Didion, GSFC Code 545.2, (301) 286-4363 Jeffrey dot R dot Didion at nasa dot go In this work, the electrohydrodynamic (EHD) instability induced by a unipolar charge injection is extended from a single-phase dielectric liquid to a two-phase system that consists of a liquid-air interface. A volume of fluid (VOF) model based two-phase solver was developed with simplified Maxwell equations implemented in the open-source platform OpenFOAM\\textsuperscript. The numerically.

Designs and applications of electrohydrodynamic 3D printin

Electrohydrodynamic (EHD) printing [17, 18], is a high-resolution printing method, which effectively overcomes the limitation in resolution from the nozzle size in inkjet printing. In the EHD printing, the ink material is driven by an electric field, which causes mobile ions in a polarizable liquid to gather at the surface The Electrohydrodynamic (EHD) is an active heat transfer augmentation technique which utilizes the effect of secondary motions generated through the application of an electrostatic potential to a dielectric fluid. The net result is better momentum and heat transfer between th

Boiling heat transfer enhancement was obtained up to 40% for R-11 which had moderate relaxation time of 1.3s. However remarkable boiling heat transfer enhancement has been obtained up to three fold increase (300%) for HCFC-123 which has the electrical charge relaxation time of 0.89x10 -3 s. For FC-72 having longer relaxation time than the. In this paper, the electrohydrodynamic (EHD) printing method for the flexible electronics with nanosilver ink was studied. The effect of DC voltage and air pressure on the printed nanosilver line was experimentally researched on the printing system

Experimental study has revealed that the electrical charge relaxation time is an important parameter for the boiling heat transfer enhancement under electric field. Up to 1210% enhancement of boiling heat transfer was obtained for R113+wt4% ethanol mixture which has the electrical charge relaxation time of 0.0053 sec whereas only 280%. EHDT Construction Details. Cut a strip of foil long enough to make three sides of a triangle. Gently fold over the top a long edge so you are left with a long rounded edge, and a long sharp edge opposite. The rounded edge will be closest to the corona wire. Fold the strip into three equal sections, plus a little extra for sticking the ends.

Indeed, elastohydrodynamic theory predicts that the contact exit and the contact sides have a smaller film thickness than the centre. The Figure 2 (bottom) represents the raw picture of a EHL film thickness measurement through white light interferometry method. One can observe that the film thickness at the centre () is larger than on the sides. Electrohydrodynamic (EHD) drying is a novel non-thermal technique that has been developed (Basiry and Esehaghbeygi 2010; Esehaghbeygi and Basiry 2011; Bai et al. 2012). Isobe et al. ( 1999 ) indicated that the drying rate of agar gel under the EHD system was about 3 times faster than the control EHD (electrohydrodynamic) actuators are electro-fluidic actuators whose motion results from charges being induced and accelerated in a liquid. They are extremely compact, silent, and low power (≤10 mW). They have been recently demonstrated in stretchable pumps and for the wireless propulsion of simple floating robots

electrohydrodynamic

In order to explore and investigate the new method of drying Chinese wolfberry fruits, electrohydrodynamic (EHD) drying system was used to drying for Chinese wolfberry fruits with a multiple needle-to-plate electrode on five levels alternating voltage at 0, 20, 24, 28 and 32 kV and a multiple needle-to-plate electrode on a level direct voltage. Electrohydrodynamic (EHD) printing is a newly emerging additive manufacturing strategy for the controlled fabrication of three-dimensional (3D) micro/nanoscale architectures. This unique superiority makes it particularly suitable for the biofabrication of artificial tissue analogs with biomimetic st The electrohydrodynamics (EHD) technique has shown promising results in enhancing heat transfer and mass transport. It has endless potential in industrial applications such as drying technology, design of evaporators, condensers, electrostatic precipitator, plasma actuator, and micropumps in microfluidic, chip-integrated cooling, and drug delivery systems Electrohydrodynamic (EHD) Printing of Molten Metal Ink for Flexible and Stretchable Conductor with Self-Healing Capability. Yiwei Han, Department of Industrial and System Engineering, North Caroline State University, Raleigh, NC, 27695 USA. Search for more papers by this author

Electrohydrodynamic (EHD) jet printing has a variety of benefits compared to conventional inkjet techniques, such as high resolution and the ability to work with high-viscosity pastes EHD-RP combines the high spatial resolution of electrohydrodynamic (EHD) printing 21,22 with the in situ generation and deposition of metal ions from sacrificial anodes 23,24. We demonstrate that. We report the employment of an electrohydrodynamic-jet (EHD)-printed diketopyrrolopyrrole-based copolymer (P-29-DPPDTSE) as the active layer of fabricated organic field-effect transistors (OFETs) and circuits. The device produced at optimal conditions showed a field-effect mobility value of 0.45 cm2/(Vs). The morphologies of the printed P-29-DPPDTSE samples were determined by performing.

Effect of electrohydrodynamic (EHD) on condensation of R-134a in presence of non-condensable gas. International Communications in Heat and Mass Transfer, 2009. Mohsen Nasr Esfahany. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper The feasibility of an electrohydrodynamic (EHD) heat pipe has been considered in the first research report of this seriesl and elsewhere.2 A simple analytical model for these devices has been developed. Calculations based upon this model have led to the recognition of some of the performance limits on EHD heat pipes

Abstract: Electrohydrodynamic (EHD) has been applied in many areas, such as EHD atomization, EHD enhanced heat transfer, EHD pump, electrospray nanotechnology, etc. EHD atomization is a promising materials deposition technique as it allows uniform and regular deposition, and offers a range of other advantages, such as low cost compared with other current techniques, easy set-up, high. Based on the specific electrostatic force, eNano Printing System can provide you; 1. High Resolution Printing: 1um ~ (depends on material) 2. Printing using. Electrohydrodynamic (EHD) propulsion provides thrust through the coupling between electrostatic body forces and a neutral fluid, such as air. Ions generated in the neutral fluid and under the influence of an applied electric field collide with neutral fluid molecules, generating what is known as an electric or ionic wind [ 1 ]

Electrohydrodynamic nanoprinting – Laboratory of

Electrohydrodynamic jetting (EHD jetting) is a tech-nology that can be used to fabricate scaffolds with high precision, accuracy, and resolution.27-29 It is also a layer-by-layer process and utilizes a high voltage applied between the nozzle and substrate to extrude very thin aligned fibers (down to 5 lm). The working principle o Electrohydrodynamic jet printing (EHD) was employed to achieve this. EHD makes use of an electric field to release a conductive ink from a fine capillary (Fig. S2, ESI†). High printing resolution can be obtained using EHD as the geometry of the jet is not limited by the nozzle size, but rather by the applied potential Electrostatic precipitator (ESP) is widely used for dust removal from flue gas in industry. In the electrostatic precipitation, the electrohydrodynamic secondary flow (EHD) produced by corona ionization has an important influence on the characteristics of particle transport and the collection efficiency of ESP. In this work, a comprehensive ESP model with interaction of multiple physical. Electrohydrodynamic (EHD) thrust in air, using a pair of asymmetrical electrodes under large potential differences of the order of tens of kilovolts, was first proposed by Brown . The 'lifter' concept has recently been popularized, of which a typical configuration is shown in figure 1 An example of this is electrohydrodynamic (EHD) drying, which has been developed only recently. At present, there are only few reports on drying seafood products using EHD. Thus, this study has investigated EHD-dried shrimps for the first time. The results indicate that EHD drying is more efficient in terms of energy saving; quality factors for.

Electrohydrodynamic (EHD) excitation of liquid jets offers an alternative to piezoelectric excitation without the complex frequency response caused by piezoelectric and mechanical resonances. In an EHD exciter, an electrode near the nozzle applies an alternating Coulomb force to the jet surface, generating a disturbance which grows until a drop breaks off downstream Electrohydrodynamic (EHD) printing can be used to fabricate high resolution (~100 nm) features at high rates (~10 kHz), and is compatible with a wide range of materials. However, conventional EHD printing techniques focus only on homogeneously dispersed functional inks, including nanoparticulate materials, molecular and polymers Electrohydrodynamic Direct-Writing for Flexible Electronic Manufacturing. This book provides an overview of essential research on and developments in the electrohydrodynamic (EHD) direct-writing technique and its applications. Firstly, it presents mechano- and helix electrospinning methods to achieve direct writing of straight/serpentine micro.

NASA - NASA is Making Hot, Way Coo

  1. Here, we develop a new class of ultrahigh areal number density solid-state MSCs (UHD SS-MSCs) on a chip via electrohydrodynamic (EHD) jet printing. This is, to the best of our knowledge, the first study to exploit EHD jet printing in the MSCs. The activated carbon-based electrode inks are EHD jet-printed, creating interdigitated electrodes.
  2. A prototype electrohydrodynamic driven thermal control system (EHD-TCS) Goddard Space Flight Center has designed and fabricated a novel, prototype thermal control system operated solely by electrohydrodynamic (EHD) forces. The EHD-TCS consists of an EHD pumping section, transport tubing, a thermal-hydraulic test section, and a condenser section
  3. Abstract The technique of electrohydrodynamic (EHD) drying was used to dehydrate potato slabs of 2, 4, and 8 mm thickness. A single point-to-plate corona discharge electrode of an EHD system enhanced the average rate of evaporation by a factor of 2·5 for 2 and 4 mm and 2·1 for the 8 mm slab compared with the baseline values of the corresponding air-dried control samples in the laboratory

Electrohydrodynamic Heat Transfer - ElectroCell System

  1. Electrohydrodynamic (EHD) has been applied in many areas, such as EHD atomization, EHD enhanced heat transfer, EHD pump, electrospray nanotechnology, etc. EHD atomization is a promising materials deposition technique as it allows uniform and regular deposition, and offers a range of other advantages, such as low cost compared with other current techniques, easy set-up, high deposition rate.
  2. Electrohydrodynamic (EHD) drying is a novel non-thermal technique that has been developed (Basiry and Esehaghbeygi 2010; Esehaghbeygi and Basiry 2011; Bai et al. 2012). Isobe et al. (1999) indicated that the drying rate of agar gel under the EHD system was about 3 times faster than the control. Hashinaga et al. (1999) found that applicatio
  3. Cellulose was extracted from sugarcane bagasse and treated with electrohydrodynamic (EHD) device. The EHD-treated and non-treated cellulose fibers were added to whipping cream at three levels of 0.5%, 1%, and 1.5% wt/wt. Whipped cream was prepared using different fat concentrations (25%, 30%, and 35% wt/wt)
  4. A simpler alternative is electrohydrodynamic (EHD) thrust, which requires no moving mechanical parts. In EHD, corona discharge generates a flow of ions in an electric field between two electrodes; the high-velocity ions transfer their kinetic energy to neutral air molecules through collisions, accelerating the gas and creating thrust
  5. The objective of this research is to investigate a high-resolution electrohydrodynamic (EHD) 3D printing process with thermoplastic materials to achieve high precision additive manufacturing of complex objects. The proposed process overcomes the resolution barrier of most existing additive manufacturing approaches

Electrohydrodynamic (EHD) flow is a flow of electrically neutral gas caused by corona-generated ions drifting through it. Many aspects of this gas movement phenomenon such as electric field and charge distribution, fluid dynamics, and heat transfer were exten Electrohydrodynamic jet (EHD-jet) printing is a high-resolution printing method, in which the printed materials, ranging from nanoparticles [9-11], polymer solution or polymer melt [12, 13], ceramic solution to composite materials , are subjected to a high electrostatic field to form a Taylor-cone structure and a fine jet issued from the cone.

High-resolution ac-pulse modulated electrohydrodynamic jet

EHD thruster stands for electrohydrodynamic thruster. This is the general and most appropriate term used for high voltage devices that propel air or other fluids, to achieve relative motion between the propulsion device and the propelled fluid. EHD thrusters, unlike the related ion thruster family, do not need to carry their own supply of gas. This paper mainly reviews the designs of electrohydrodynamic (EHD) inkjet printing machine and related applications. The review introduces the features of EHD printing and its possible research directions. Significant progress has been identified in research and development of EHD high-resolution printing as a direct additive manufacturing.

Electrohydrodynamic (EHD) inkjet, also called e-jet, printing as a mask-less, non-contact, direct-write, and additive manufacturing process has attracted the remarkable attention. EHD inkjet printing is first proposed as a solution to the limited resolutio Electrohydrodynamic effect offers promise for efficient propulsion in air. A typical 'lifter' design. When a current passes between two electrodes — one thinner than the other — it creates a wind in the air between. If enough voltage is applied, the resulting wind can produce a thrust without the help of motors or fuel

Electrohydrodynamic Stability 181 whenthediffusivecurrentcanbeneglected,i.e. Θ 2 = i D i O 1. (19) Inelectrohydrodynamicsystems,thediffusivecurrentisusuallymuchsmalle Electrohydrodynamic (EHD) ionic wind pumps offer a possible solution. In this technique, applying a voltage to a sharp electrode ionizes air molecules, which are propelled by the electric field, transferring momentum to neutral air molecules, thus creating airflow and cooling. A previous paper discussed the successful integration of an EHD. Electrohydrodynamic (EHD) spraying of liquids is a physical process caused by the electric force applied to the surface of liquid. The electrical shear stress elongates the liquid meniscus formed at the outlet of a capillary, to the form of a cone and/or a jet which next deforms and disrupts into droplets because of the electrical and. This paper describes the relatively novel technique of electrohydrodynamic (EHD) drying of apple slices, which did not cause any observable product degradation and extensive color changes. Multiple point-to-plate electrodes with AC high voltages, accelerated the initial drying rates to almost 4.5 times over the ambient air drying control Electrohydrodynamic (EHD) drying was tested as an improved dehydration method for scallop muscle. The scallop muscle was dried in an EHD drying system at 15°C, in an oven at 60°C, and in ambient air at 15°C. The energy consumption of EHD and oven drying, as well as the shrinkage rate, water absorption, solid loss, and sensory properties such.

Elastohydrodynamic (EHD) Lubrication. Definition of EHD lubrication. The lubrication principles applied to rolling bodies, such as ball or roller bearings, is known as elastohydrodynamic (EHD) lubrication. Rolling body lubrication. Although lubrication of rolling objects operates on a considerably different principle than sliding objects, the. The electrohydrodynamic (EHD) conduction pumping takes advantage of the electrical Coulomb force exerted on dielectric liquid by externally applied electric field(s). The conduction term here represents a mechanism for electric current flow in which charged carriers are produced not by injection from electrodes or induction from electric fields, but by dissociation of neutral electrolytic. A charge-conservative approach for simulating electrohydrodynamic two-phase ows using Volume-Of-Fluid J. M. L´opez-Herrera1 S. Popinetb, M. A. Herrada1 aDept. Ingenier a Aerospacial y Mec anica de Fluidos, E.S.I, Universidad de Sevilla, Camino de los Descubrimientos s/n, 41092, Seville, Spain EHD-convection-2D-openGL. This code solves the 2D electrohydrodynamic convection problem with openGL visualization and control. Windows with Visual Studio: Project properties => C/C++ Additional Include Directories: Need to add: C:\ProgramData\NVIDIA Corporation\CUDA Samples\v9.2\common\inc for openG

Electrohydrodynamic (EHD) Thrusters - RMCybernetic

EHD thruster stands for electrohydrodynamic thruster.This is the general and most appropriate term used for high voltage devices that propel air or other fluids, to achieve relative motion between the propulsion device and the propelled fluid Electrohydrodynamic (EHD) jet printing creates micro or nano scale patterns using a simple configuration of a printing nozzle, precision pump, voltage generator, and pressure regulator. Drawing pat..

Electrohydrodynamic (EHD) Cleaning for CRES Reduction in a High Volume Production Environment - An Engineering Evaluation Jim Andersen Applied Precision, Inc. 1040 12th Avenue, NW Issaquah, WA 98027 Rey Rincon Texas Instruments, Inc. 13560 N. Central Expressway Dallas, TX 75243 Jerry Broz Texas Instruments, Inc. 13560 N. Central Expressway. We have investigated the effect of electrohydrodynamic (EHD) convection on the domain structure in a polystyrene (PS)/polyvinyl acetate (PVA) blend film to demonstrate the feasibility of using the EHD effect as a means of mixing and morphology control in a polymer blend film prepared by solvent evaporation. Here, polymers−toluene solutions were spread on a glass substrate with patterned. One such demand is the advent of flexible electronics for wearable technology, medical applications, and biology-inspired mechanisms. This paper presents the design and performance characteristics of flexible electrohydrodynamic (EHD) pumps, based on EHD conduction pumping technology in macro- and mesoscales

(PDF) A review on Electrohydrodynamic (EHD) pump

  1. years, an electrohydrodynamic (EHD) jetting device has been suggested and developed as an alternative.6-10) The EHD jetting is primarily based on instability of charged droplets in an electric field.11) In EHD printing, the electrical force acts directly on the meniscus to elongate it to an unstable shape, and finall
  2. INTHEpastdecades,electrohydrodynamic (EHD)thrusters have beenpopularizedwiththelifterorionocraftconcept.Itconsists of a light frame supporting two electrodes connected to a high dc voltage supply. At sufficiently high voltages, the device takes off without the help of anymechanical part. This phenomenonrelies o
  3. A multistage EHD generator with parallel outputs to produce a usable outputurrent. A single injector injects particles or droplets into a fluid flow which traverses a plurality of EHD generator stages in series. At each generator stage there is a means for charging the particles and a means for neutralizing the particles. The outputs between the charging and neutralizing means are connected in.
  4. Electrohydrodynamic (EHD) direct-writing has been widely used to fabricate micro/nanofibers that can serve as a building block in tissue engineering scaffolds. However, the application of EHD direct-writing in tissue engineering is limited by the lack of fundamental knowledge in the correlations among the process parameters, the fiber surface roughness, and the cell adhesion performance
  5. electrohydrodynamic (EHD) co-jetting has been developed as a high throughput system for the fabrication of multifunctional particles and fibers, where the internal architecture can be designed to incorporate unique capabilities.19-21 During the EHD co-jetting process, two or more polymeric solutions are flown in a side-by-side configuratio
Nano-Fabrication / Advanced Manufacturing

Experimental studies were undertaken to investigate separation of fine water particles from a stream of air-water droplet mixture using the electrohydrodynamic (EHD) effect. Air-water droplets mixture flows through a prototype consisting of 7 tubes arranged in a circular pattern which is enclosed in bigger tube Electrohydrodynamic drying 1. Drying is a mass transfer process comprising the removal of water by evaporation. Applications - • Restrain microbial development • Inhibit quality decay • Aid in processing • Confer desirable texture • Cost reduction Drying is an energy-intensive process and accounts for about 10-20 % the total energy required in food processing industries Electrohydrodynamic (EHD) mixing of two miscible dielectric liquids. Chemical Engineering Journal, 2013. M. Jalaa In this study, we have developed a microfluidic pump that utilizes the electrohydrodynamic (EHD) conduction of a working fluid. Ring-shaped pumps have been used in previous studies on EHD conduction, but these require a three-dimensional arrangement of electrode pairs, which makes it difficult to downsize the apparatus

Ion-propelled aircraft - Wikipedi

ehd electrohydrodynamic fiber Prior art date 2005-10-31 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number EP06827171A Other languages German (de) French (fr) Other versions. Electrohydrodynamic (EHD) flows emerge in dielectric liquids under the action of the Coulomb force and underlie energy-efficient techniques for heat and mass transfer. The key issue in the phenomena is the way how the net charge is created. One of the most promising, yet poorly studied charge formation mechanisms is the field-enhanced dissociation (or the Wien effect) Electrohydrodynamic (EHD) printing has great potential to be used in the field of electronic industry, precision optics and biological engineering. However, it is still a challenge to achieve a high scaling ratio for line patterns production by EHD jet printing technique, which can effectively prevent the needles to be blocked Electrohydrodynamic (EHD) heat transfer enhancement is a technology that may yield substantial reductions in heat exchanger weight and volume, as well as on-demand heat transfer. An overall assessment of the applicability of EHD to aircraft systems is given and key areas for future investigation to enable application are identified electrohydrodynamics (EHD). While there exist solvers oriented towards modeling systems that are governed by EHD physics, e.g., [3,4], there are several factors that limit the applicability of these methodologies for high resolution e-jet printing; the e-jet printing process that is defined b

Electrohydrodynamic (EHD) cooled laptop - IEEE Conference

directly on a chip by electrohydrodynamic (EHD) jet printing. The on-chip UHD SS-MSCs comprise activated carbon-based, high- resolution interdigitated electrodes and ultraviolet (UV)-cured thermally/mechanically stable solid-state gel electrolytes. The details of the preparation and characteristics of the EHD jet-printed elec Electrohydrodynamic (EHD) printing [15-17] is a high-resolution printing approach, in which the liquid ink is subject to electric field and forms a Taylor cone and ejects a droplet or jet. The size of the droplet or jet is much smaller than the size of the nozzle. Therefore EHD printing method can effectively overcome the resolutio Electrohydrodynamic (EHD) jet printing has beenproposed as viable non-contact printing technique. EHD jet printing is a method for obtaining fine patterns with diameters ranging from nanometres to micrometers, which uses a fine jet generated at the apex of liquid meniscus in electrospray Reduced gas velocity increases the potential for electrohydrodynamic (EHD) phenomena to occur within ESP channels by reducing fluid inertial forces compared to EHD forces, the ratio of which is represented by EHD number or Masuda number and which can be used to predict the onset of prominent EHD phenomena and flow features (IEEE-DEIS-EHD. Experimental and numerical investigations have been conducted to study the mechanisms involved in the electrohydrodynamic (EHD) induced flow and heat transfer augmentation of two-phase systems. The experimental study involved tube-side boiling heat transfer of the environmentally friendly HFC-134a in a single-pass, counter-flow heat exchanger 1.

An example of such a non-traditional innovation is an electrohydrodynamic (EHD) conduction based flow generation and distribution control system. Electrohydrodynamics is the study of the interactions between applied electric fields and fluid flow fields. In all EHD phenomena, fluid motion is caused by charges in the working fluid migrating unde Electrohydrodynamic (EHD) thrusters are devices which convert electrical energy di-rectly into a thrust force [4]. Every electrohydrodynamic device requires electrodes to create an electric eld, an ion source, and an ambient uid. EHD thrusters of various shapes and sizes have been built, but they have all included components comprisin Rada, M, Ohadi, M, & Shooshtari, A. An Electrohydrodynamic (EHD) Meso Pump for Cryogenic Spot Cooling of Low Volume Complex Electronics. Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition Electrohydrodynamic (EHD) ionic wind pumps offer an attractive alternative to fans. In this technique, applying a voltage to a sharp electrode ionizes nearby air molecules, which are then propelled by the electric field transferring momentum to neutral air molecules, generating bulk airflow and cooling Electrohydrodynamic (EHD) printing has been developed as a promising technique to print different materials on a variety of substrates with high resolution. Here, AgNW ink was developed for EHD printing. The printed fea-tures can be controlled by several parameters including AgN

Numerical analysis of electrohydrodynamic (EHD

Electrohydrodynamic (EHD) patterning technique to fabricate micro-/nanostructures in thin polymer film has been developed in recent years [4-10]. EHD patterning is achieved by utilizing the interaction of an electric field with an interface between polymer film and another media of different permittivity [ 11 ] A potential method to reduce the pressure requirements is to use Electrohydrodynamic (EHD) assisted atomization. EHD assisted atomization injects electrical charges into the liquid fuel before spraying, meaning the fuel has an electrical charge distribution before and after atomization. For many relevant engineering flows, including liquid fuel. focused electrohydrodynamic ejection of metal ions dissolved from sacrificial anodes and their subsequent reduction to elemental metals on the substrate. This technique, termed electrohydrodynamic redox printing (EHD-RP), enables the direct, ink-free fabrication of polycrystalline multi-metal 3D structures without the need for post-print.

Electrohydrodynamic Printing - an overview ScienceDirect

ABSTRACT An innovative drying method for seafood products is presented in this paper. Shrimps, as a representative of seafood products, were dried using ambient air, an electrohydrodynamic (EHD) system at 15C and an oven at 60C. Dried shrimps' shrinkage rate, water absorption, rehydration ratio, solid loss and sensory qualities such as color, texture and trimness were measured. The results. Abstract: Electrohydrodynamic (EHD) jet printing is a direct-writing technique which ejects ink through a fine noz-zle using an electric field, which has the advantages of high-resolution, rapid printing speed and a wide range of ink selectivity Cryogenic cooling has become a widely adopted technique to improve the performance of electronics and sensors. A potential application of an electrohydrodynamic (EHD) pumping system is its use in pumping fluids in cryogenic cooling systems Electrohydrodynamic (EHD) thrust results from the collisions between a neutral fluid and charged particles. Directional momentum transfer is produced by controlling the motion of the charged particles electrostatically, directly converting electrical energy into kinetic energy. The momentum transferrin In this paper, the electrohydrodynamic (EHD) inkjet printing method, which has been studied and developed in recent years, has been used to drop glycol ether solvent-based ink onto a nitrocellulose paper. The results of the field emission scanning electron microscope (FE-SEM) show that the solvent based ink could dissolve through membrane and.

Electrohydrodynamic size stratification and flow(PDF) Fabrication of polymer lenses and microlens array

Electrohydrodynamic (EHD) drying of the Chinese wolfberry

In order to improve the drying technique and the drying efficiency, reducing the energy consumption of Electrohydrodynamic (EHD) drying, the influence of operating parameters on the drying rate and energy consumption were investigated. Tofu contained in the petri dish was put in EHD system which was made up of a wire pole and a plate pole Electrohydrodynamic (EHD) drying is a novel drying method used to enhance forced convective drying by using a wire-electrode to create an electrostatic field. In this study, it was hypothesized that an EHD enhanced forced convective drying process will not only increase the drying rate, but also the exergetic efficiency over time

Electrohydrodynamic Printing - GeeksGo

Prior numerical solutions of electrohydrodynamic (EHD) gas flows in a horizontal channel with a positive-corona discharged wire have revealed the existence of steady-periodic flows. It is speculated that heat transfer by forced convection may be greatly enhanced by taking advantage of this oscillatory flow phenomenon induced by electric field

Electromagnetic interference shielding effectiveness ofApplied Sciences | Free Full-Text | A Vector Printing