10 فروردین 1403
توحيد اديبي

توحید ادیبی

مرتبه علمی: دانشیار
نشانی: بناب - دانشگاه بناب
تحصیلات: دکترای تخصصی / مهندسی مکانیک (تبدیل انرژی)
تلفن: 04137745000-1620
دانشکده: دانشکده فنی و مهندسی
گروه: گروه مهندسی مکانیک

مشخصات پژوهش

عنوان
A characteristic-based solution of forced and free convection in closed domains with emphasis on various fluids
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
convection, Prandtl number, Grashof number, Nusselt number, numerical method, complex boundary conditions
پژوهشگران توحید ادیبی (نفر اول)، امید ادیبی (نفر دوم)، سید اسماعیل رضوی (نفر سوم)

چکیده

In this paper, forced and free convection in the cavity is simulated numerically with complex boundary conditions. Temperature changes sinusoidal at the upper and right walls and the temperature of the other walls is kept at zero. The effects of Prandtl and Grashof numbers variations on flow patterns are surveyed. A wide range of materials e.g. molten metals, gases, water, and coolant liquid are considered. For this purpose, an in-house code is written in FORTRAN-95 within the finite volume framework. For time discretization, the fifth-order Rung-Kutta method is applied. The convective terms are calculated by a novel characteristic-based scheme along with artificial compressibility. The flow is assumed to be incompressible, laminar and two dimensional. It was found that higher Nusselt numbers have affected increasing Grashof numbers. The effect of Gr on Nu at the upper wall is stronger than that of the down wall. But the effect of Pr on Nu at upper wall is almost equal with that of the down wall.