Numerical investigation of electrohydrodynamic plumes for locally enhanced cooling in dielectric liquids
Numerical investigation of electrohydrodynamic plumes for locally enhanced cooling in dielectric liquids
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DOI：
10.1109/ias.2013.6682449
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
Jian Wu;P. Traoré;C. Louste;L. Dascalescu;F. Tian;A. Pérez
中科院分区：
文献类型：
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作者：
Jian Wu;P. Traoré;C. Louste;L. Dascalescu;F. Tian;A. Pérez
在这项研究中，我们通过数值模拟探讨了电流体动力学（EHD）羽流在冷却局部高温区域中的潜在应用。EHD羽流由浸没在电介质液体中的锋利金属叶片的离子注入引起。对非等温液体中的EHD羽流进行了二维数值模拟。结果表明，局部努塞尔数和平均努塞尔数均随电瑞利数（T）和注入强度参数（C）的增大而增大。然而，对于相同的T和C，传热增强效果更强的小瑞利数（Ra），这可以通过比较库仑力和浮力之间的相对重要性来理解。
In this study, we numerically explored the potential application of Electro-Hydro-Dynamic (EHD) plumes in cooling local regions with high temperature. The EHD plume is induced by ion injection from a sharp metallic blade immersed in a dielectric liquid. A two-dimensional simulation which took all relevant physical variables for EHD plumes in a non-isothermal liquid into account was performed. It is found that both the local and average Nusselt numbers dramatically increase with the increase of the electric Rayleigh number (T) and the injection strength parameter (C). However, for the same T and C, the heat transfer augmentation effect is stronger for small Rayleigh numbers (Ra), which can be understood by comparing the relative importance between Coulomb force and buoyancy force.