Experimental study of heat transfer enhancement in electrohydrodynamic conduction pumping of liquid film using flush electrodes

Nourdanesh, Nader; Esmaeilzadeh, E.

doi:10.1016/j.applthermaleng.2012.08.038

Cited by 23 publications

(8 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The level of the efficiency also turns out to be very small, at most 0.03%. But this is not far from the values reported in the literature, for example, 0.1% in Nourdanesh and Esmaeilzadeh 33 and 0.001% in Pearson and Seyed-Yagoobi. 34 Furthermore, the pressure difference Dp in this study remains very small, typically 0.089 Pa at W = 0.4 mm, and we did not attempt to investigate the influence of Dp on Q, 12,15,23,25,34 which requires further simulation, for instance, with a longer channel or with an artificial block on the fluid stream inside the channel.…”

Section: Parametric Study With Electrode Pattern Acontrasting

confidence: 64%

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

Cho

Kang

Suh

2016

Advances in Mechanical Engineering

View full text Add to dashboard Cite

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.

show abstract

Section: Parametric Study With Electrode Pattern Acontrasting

confidence: 64%

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

Cho

Kang

Suh

2016

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Compact size, simple design, no moving parts, noiselessness and insignificant electricity consumption (Seyed-Yagoobi and Bryan, 1999) are the reasons for this wide attention. Nourdanesh and Esmaeilzadeh performed the initial experimental investigation on the influences of EHD conduction designs for enhancing heat transfer (Nourdanesh and Esmaeilzadeh, 2013). Their study indicated meaningful variations in transferred heat and mass flow rates by increasing applied voltage.…”

Section: Introductionmentioning

confidence: 99%

Introduction of a novel electric field-based plate heat sink for heat transfer enhancement of thermal systems

Nourdanesh

Ranjbar

2021

HFF

Self Cite

View full text Add to dashboard Cite

Purpose The purpose of this study is to use an electric field technique to design novel heat sinks capable of rejecting as much heat as possible in a limited space. Configuration of electrodes in this study can be used for increasing the efficiency of heat sinks. Design/methodology/approach This study investigates a novel electrohydrodynamic (EHD)-based heat sink for thermal management of electronic devices and thermal systems. The significant part of designing an EHD heat sink is the arrangement of the electrodes. A numerical simulation is performed for a heat sink with two parallel plates to determine the optimum dimensional configuration of electrodes. The upper plate of this heat sink is the ground electrode with a constant atmosphere temperature, and the lower plate of it with flush-mounted high-voltage electrodes has uniform heat flux. Findings The results show that heat transfer changes by the size of the vortices and the number of them. These vortices are emerged by the electric field, and the number of them increases with increasing the number of electrodes. The interaction of vortices size and number leads to having the lowest average temperature in the optimum case by two high voltage electrodes with widths of 7.5 mm and a 17.5 mm gap between them. In comparison with the case without the electric field, with increasing the applied voltage to 30 kV, the efficiency of this EHD heat sink increases up to 37%. Originality/value Improvements in electrical equipment make them more compact with higher heat fluxes. Hence, the amount of heat to be dissipated per area increases and needs thermal management to operate at their design temperatures. Therefore, to improve the performance and life span of electronic components and increase their efficiency, it is necessary to design heat sinks to decrease their maximum (peak) temperature.

show abstract

“…Yazdani 和 Seyed-Yagoobi [28,[135][136][137][138][139] 利用传导机制，产生高速射流冷却加热表面、进行球型储液器的热均匀化处理以及增强流速通道来流的强迫对流，提高系统的散热能力。 Nourdanesh 与 Esmaeilzadeh [140] 采用平嵌电极泵送煤油，进行传导强化对流散热与自然对流散热对比实验研究。Nourdanesh 等 [141] 在文献 [140] [142,143] 构建了一种新型的 EHD 传导强化双管换热器，在冷却管中布置平嵌电极，增强液体对流换热。图 25 嵌入纺织手套中，用于调节体温的可伸缩泵 [33] Fig 25 Stretchable pump embedded in a textile glove for on-body thermal regulation [33] Cacucciolo 等 [33] 将柔性泵嵌入在纺织手套内，进行体温热调节，如图腾时，性能几乎不受重力的影响 [146] 。实验结果有力地证实了电导泵长期应用于航空散热系统的应用前景。传导机制还可应用于提高池沸腾临界热流密度、强化沸腾传热 [147][148][149][150] 。Pearson 和 Seyed-Yagoobi [151] 创新设计了同心环形的结合电极布置，使容器周围液体从不同方向流向中心加热蒸发区。在给定热通量的条件下，传导机制产生可观的循环速度湿润中心液体沸腾区与液膜几乎停滞无传导机制的状态相比，蒸发器表面液体过热温度显著降低。图 26 液体薄膜沸腾实验系统 [152] Fig 26 Experimental system of liquid film boiling [152] 为 [21,[153][154][155] 基于 MEMS 加工技术制作的微注入泵、华南理工大学万珍平等 [58] 基于微加工制作的一种微电导泵。山东大学李斯盟等 [156]…”

Section: 电导泵可应用于单相、两相流动分布与控制，已展现了在液膜输运、强化散热等领域的广阔应用前景。unclassified

Overview of electrohydrodynamic conduction pumping

Du¹,

Wu²,

Huang³

et al. 2022

Sci. Sin.-Tech.

View full text Add to dashboard Cite

Experimental study of heat transfer enhancement in electrohydrodynamic conduction pumping of liquid film using flush electrodes

Cited by 23 publications

References 22 publications

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

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

Introduction of a novel electric field-based plate heat sink for heat transfer enhancement of thermal systems

Overview of electrohydrodynamic conduction pumping

Contact Info

Product

Resources

About