کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
660678 1458147 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal instability of nanofluids in natural convection
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Thermal instability of nanofluids in natural convection
چکیده انگلیسی

Thermal (Bénard) instability in nanofluids is investigated in this work. Emphasizing the combined behaviors of Brownian motion and thermophoresis of nanoparticles, the critical Rayleigh number is shown to be lower by one to two orders of magnitude than that for regular fluids. The highly promoted turbulence increases the energy bearing capacity of nanofluids, which could result in higher overall heat transfer coefficient than the increase of the effective thermal conductivity alone. The dominating groups are extracted from the nondimensional analysis. Close form solutions for the Rayleigh number are derived from the method of eigenfunction expansions and the weighted residual method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 51, Issues 11–12, June 2008, Pages 2967–2979
نویسندگان
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