Electrohydrodynamic conduction pumps with cylindrical electrodes for pumping of dielectric liquid film in an open channel

Hojjati, Mohammad Reza; Esmaeilzadeh, E.; Sadri, Behnam; Gharraei, R.

doi:10.1016/j.colsurfa.2011.10.007

Cited by 18 publications

(11 citation statements)

References 20 publications

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“…Простейшие макро-и микроэлектрогидродинамические насосы (ЭГДН) состоят из двух электродовэмиттера и коллектора различной конструкции [1][2][3][4][5][6], размещенных в диэлектрическом канале и подключенных к источнику высокого напряжения. Под действием электрического поля между эмиттером и коллектором в рабочей среде формируется избыточный заряд знака эмиттера.…”

Section: Introductionunclassified

“…Oн применяется при исследовании процессов тепло-и массопереноса [17,18], смешения газов или жидкостей, явления распространения пламени или изучении сверхзвуковых потоков, где градиенты плотности достаточны для большого отклонения света. Шлирен-метод не вносит какие-либо неоднородности в среду, в отличие от микрочастиц, используемых для визуализации ЭГД-течений [6,9], позволяет выявить характер течения, дает представление о диссипативных (возвратных) течениях и турбулизации потока, оказывающих влияние на эффективность работы насоса.…”

Section: Introductionunclassified

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Influence of Electrohydrodynamic Flows on the Intensification of the Heat and Mass Exchange Processes. Part I. Electrohydrodynamic Flows and Characteristics of Single-Stage Electrohydrodynamic Pumps

Kozhevnikov¹,

Болога²

2022

EOM

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The results of investigations of electrohydrodynamic (EHD) flows using the schlieren method in the following systems of electrodes: “a blade – isolated edge blade”, “a blade – two rods”, and “a rod with a perforated isolation coating – two rods” are presented. On the base of the obtained results, single-stage EHD pumps were designed. Their head and flow specifications were studied depending on various factors. It was shown that the performance of the EHD pumps can be increased by application of dielectric coatings on the electrodes. The maximal efficiency was obtained in the system of electrodes “a blade – a blade with isolated edge”, the maximal static pressure – in a three-rod system with a perforated isolation coating of the emitter. The advantages of a three-rod system were specified related to the improvement of the flow characteristics of the pumps due to their parallel arrangement and increasing of the pump pressure by using multi-stage pumps with grid electrodes.

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Section: Introductionunclassified

Influence of Electrohydrodynamic Flows on the Intensification of the Heat and Mass Exchange Processes. Part I. Electrohydrodynamic Flows and Characteristics of Single-Stage Electrohydrodynamic Pumps

Kozhevnikov¹,

Болога²

2022

EOM

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“…These heterocharge layers are the key to the pump, as the movement of the charges pushes the liquid molecules forward. Therefore, net body force can be generated in the liquid within the chamber using asymmetric electrodes or the mismatch of the mobility of positive and negative ions 9,10,11,12 . This work introduces a new way of fabricating a symmetric planar electrode plate for a conduction pump.…”

Section: Introductionmentioning

confidence: 99%

A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate

Feng

Wan

Feng

et al. 2017

JoVE

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Here, a conduction micropump with symmetric planar electrode pairs prepared on flame-retardant glass-reinforced epoxy (FR-4) copper-clad laminate (CCL) is fabricated. It is used to investigate the influence of chamber dimensions on the performance of a conduction micropump and to determine the reliability of the conduction pump when acetone is used as the working fluid. A testing platform is set up to evaluate conduction micropump performance under different conditions. When the chamber height is 0.2 mm, the pump pressure reaches its peak value.

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“…After a turning point, however, it increases in a linear fashion with the field intensity. 12,15,18,26,27 Shown in Gharraei et al 26 and Hojjati et al 27 is the existence of a second turning point beyond which the flow rate tends to a saturated value. No plausible explanation for such variation exists yet.…”

Section: Introductionmentioning

confidence: 99%

“…Circular electrodes are free from such singularity. In Hojjati et al, 27 a series of symmetrically arranged circular cylinders of equal size were used to pump dielectric liquid in an open circulating channel. It was demonstrated that mismatch of ion mobility between cations and anions can yield a unidirectional flow.…”

Section: Introductionmentioning

confidence: 99%

Development of a bi-directional electrohydrodynamic pump: Parametric study with numerical simulation and flow visualization

Cho

Kang

Suh

2016

Advances in Mechanical Engineering

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We propose a bi-directional electrohydrodynamic pump developed for transporting dielectric liquid, where the electrodes are symmetrically configured but the applied voltage is non-symmetric. The underlying principle for liquid transport comes from the so-called Onsager effect, which states that the ion concentration is increased as the electric field is increased. Multi-physics software is used to perform numerical simulation for the fluid flow, the electric potential, and the transport of ion concentrations for two kinds of electrode patterns. A flow-visualization experiment is also conducted to verify the physical models and numerical methods employed. It is found that significant reduction of the ion recombination constant is required to get matching of the experimental and simulation results. We demonstrate through a parametric study that there is an optimum distance between two large grounded electrodes for producing a maximum pumping velocity at the diameter of two small electrodes fixed at 0.3 mm. The effect of the size of large grounded electrodes on the pumping performance is also studied in terms of streamlines, electric field, and charge distribution. A general account is also given of the basic ideas of electrode arrangement for the enhancement of pumping.

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Electrohydrodynamic conduction pumps with cylindrical electrodes for pumping of dielectric liquid film in an open channel

Cited by 18 publications

References 20 publications

Influence of Electrohydrodynamic Flows on the Intensification of the Heat and Mass Exchange Processes. Part I. Electrohydrodynamic Flows and Characteristics of Single-Stage Electrohydrodynamic Pumps

Influence of Electrohydrodynamic Flows on the Intensification of the Heat and Mass Exchange Processes. Part I. Electrohydrodynamic Flows and Characteristics of Single-Stage Electrohydrodynamic Pumps

A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate

Development of a bi-directional electrohydrodynamic pump: Parametric study with numerical simulation and flow visualization

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