کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
661546 1458176 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Asymptotic analysis of heat transfer in turbulent Rayleigh–Bénard convection
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Asymptotic analysis of heat transfer in turbulent Rayleigh–Bénard convection
چکیده انگلیسی

Based on asymptotic considerations a heat transfer law for turbulent Rayleigh–Bénard convection is found that differs from existing correlations which often are of a power law type with respect to their Rayleigh number dependence. From the asymptotic temperature profile, derived by matching temperature gradients in the overlap region of the wall layer and the core layer, a Nusselt number follows which includes a logarithmic term. This correlation is in good agreement with data from highly accurate Rayleigh–Bénard experiments for Rayleigh numbers between 105 and 1015 and Prandtl numbers larger than 0.5. It is an alternative to existing power laws or more complicated correlations for Nu = Nu(Ra,Pr).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 5–6, March 2006, Pages 1129–1136
نویسندگان
, ,