کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
660480 1458116 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Unsteady mixed convection flow from a moving vertical plate in a parallel free stream: Influence of heat generation or absorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Unsteady mixed convection flow from a moving vertical plate in a parallel free stream: Influence of heat generation or absorption
چکیده انگلیسی

An unsteady mixed convection flow over a moving vertical plate in a parallel free stream is considered to investigate the combined effects of buoyancy force and thermal diffusion in presence of heat generation or absorption. The unsteadiness is introduced by the time dependent free stream velocity as well as by the moving plate velocity. The governing boundary layer equations are transformed into a non-dimensional form by a special group of non-similar transformations. The resulting system of coupled non-linear partial differential equations is solved by an implicit finite difference scheme in combination with the quasi-linearization technique. Computations are performed and numerical results are displayed graphically to illustrate the influence of the buoyancy (mixed convection) parameter, Prandtl number, the ratio of free stream velocity to the composite reference velocity and heat generation or absorption parameter on the velocity and temperature profiles. The numerical results for the local skin-friction coefficient and local Nusselt number are also presented. Present results are compared with previously published work and are found to be in excellent agreement. It is found that in presence of buoyancy force (λ > 0), the velocity profile exhibits velocity overshoot 80% more for lower Prandtl number (Pr = 0.7) as compared to the magnitude of the velocity overshoot for higher Prandtl number (Pr = 7.0).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 53, Issues 21–22, October 2010, Pages 4749–4756
نویسندگان
, ,