کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7053782 | 1458012 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electro-thermo-convective flow of a dielectric liquid due to nonautonomous injection of charge by an elliptical electrode
ترجمه فارسی عنوان
جریان الکترومتراکوچرب یک مایع دی الکتریک به دلیل تزریق غیرانسانی بار توسط یک الکترود بیضوی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Electro-thermo-hydrodynamic (ETHD) flow induced by the simultaneous Coulomb and buoyancy forces in a dielectric medium is studied using the lattice Boltzmann method. Nonautonomous charge injection from a high temperature inner elliptical electrode to two cold parallel-plate electrodes is considered. Systematical simulations are conducted for ETHD problems with different injection models and non-dimensional parameters, including electric Rayleigh number T, Rayleigh number Ra and the ellipticity e of the elliptical electrode. It is found that the charge transport process, flow instability and heat transfer enhancement are significant affected by nonautonomous injection, especially in the Coulomb force dominant flow regime and the large ellipticity cases. Quantitatively, for dielectric liquid Mâ¯=â¯10, eâ¯=â¯2 and Prâ¯=â¯10 under strong injection Câ¯=â¯10, when compared to the autonomous charge injection assumption, nonautonomous injection shown an average of 16.4% increases in the mean Nusselt number within the range of driving parameters explored (103â¯â¤â¯Raâ¯â¤â¯107, 300â¯â¤â¯Tâ¯â¤â¯1800).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part A, December 2018, Pages 373-384
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part A, December 2018, Pages 373-384
نویسندگان
Kang Luo, Tianfu Li, Jian Wu, Hong-Liang Yi, He-Ping Tan,