کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
661406 1458129 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A physical picture of the mechanism of turbulent heat transfer from the wall
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
A physical picture of the mechanism of turbulent heat transfer from the wall
چکیده انگلیسی

The present work investigates the correlation between the velocity and the temperature field in wall turbulence using direct numerical simulation of turbulent channel flow and plane Couette flow in conjunction with a Lagrangian method. Characteristic length scales for heat transfer are calculated for fluids with Prandtl numbers between 0.1 and 100. Structures of larger scales are found to contribute to the transport of heat as the distance from the wall increases. Turbulent Prandtl numbers are then calculated, showing that the turbulent Prandtl number is a function of the distance from the wall, but it does not depend on the fluid Prandtl number for high Prandtl numbers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 52, Issues 21–22, October 2009, Pages 4873–4882
نویسندگان
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