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Numerical investigation of electrohydrodynamic conduction with a temperature gradient

具有温度梯度的电流体动力学传导的数值研究

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Abstract

In this work, we present a numerical investigation of the effect of a temperature gradient on the flow characteristics of electrohydrodynamic (EHD) conduction phenomenon. The influence of temperature on the physical properties of dielectric liquids together with the dielectric force has been investigated by a dimensional simulation. To better identify the influence of different forces, a 2D asymmetric parallel electrode configuration with a temperature gradient has been considered. The effect of the dielectric force on the flow pattern and strength of EHD conduction mechanism has been investigated. In order to do this, we vary the dielectric force acting on the flow field by increasing the applied electric field strength and temperature gradient. In the process, we also discuss the effect of the dielectric force direction on the flow field. It is found that the presence of the dielectric force significantly modifies the flow pattern and strength of the system compared to the case of the Coulomb force alone in the flow field. As the applied electric field strength and temperature gradient increase, the effect of the dielectric force on the flow characteristics of EHD conduction mechanism increases.

摘要

本文模拟研究了温度梯度对电传导现象的流动特性的影响, 通过有量纲模拟研究了温度对介电液体物性及介电力的影响. 为了更好地辨别不同力的影响, 本文考虑了具有温度梯度的二维非对称平行电极配置, 研究了介电力对电传导机制的流动模式和强度的影响. 为此, 我们通过增大施加的电场强度和温度梯度来改变作用在流场上的介电力. 在此过程中, 我们同样讨论了介电力方向对流场的影响. 结果表明, 与流场中单独存在库仑力的情况相比, 介电力的存在显着改变了系统的流动模式和强度. 随着施加的电场强度和温度梯度的增大, 介电力对电传导机制的流动特性的影响增强.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 12172110) and Fundamental Research Funds for the Central Universities, China (Grant No. AUGA9803500921). P. A. Vazquez acknowledges Grant No. PGC2018-099217-B-I00 funded by MCIN/AEI/10.13039/501100011033 and by “ERDFA way of making Europe”, and Grant No. CTQ2017-83602-C2–2-R funded by MEC.

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Authors and Affiliations

  1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Zhonglin Du  (杜中林) & Jian Wu  (吴健)

  2. Heilongjiang Key Laboratory of Micro- and Nano-scale Fluid Flow and Heat Transfer, Harbin, 150001, China

    Zhonglin Du  (杜中林) & Jian Wu  (吴健)

  3. Departamento de Física Aplicada III, ETSII, Universidad de Sevilla, Camino de los Descubrimientos s/n, Sevilla, 41092, Spain

    Pedro A. Vázquez

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  1. Zhonglin Du  (杜中林)
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  2. Pedro A. Vázquez
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  3. Jian Wu  (吴健)
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Contributions

Author contributions Zhonglin Du: Methodology, Software, Investigation, Writing–original draft. Pedro A. Vázquez : Methodology, Writing–review & editing, Supervision. Jian Wu : Resources, Writing–review & editing, Supervision, Project administration, Funding acquisition.

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Correspondence to Jian Wu  (吴健).

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Du, Z., Vázquez, P.A. & Wu, J. Numerical investigation of electrohydrodynamic conduction with a temperature gradient. Acta Mech. Sin. 39, 222479 (2023). https://doi.org/10.1007/s10409-023-22479-x

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  • DOI: https://doi.org/10.1007/s10409-023-22479-x

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