نتایج جستجو برای: free convection heat transfer

تعداد نتایج: 971094  

2002
J. D. Jackson M. A. Cotton B. P. Axcell

The early study of convective heat transfer considered the branches of forced and free convection independently with only passing reference to their possible interaction. In fact the two are extreme cases of the general condition of "mixed" or "combined" forced and free convection where both mechanisms operate simultaneously. The present contribution aims to provide an up-to-date review of thos...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2014
j. prakash k. s. balamurugan s. vijaya kumar varma

an analytical study was performed to study effects of thermo-diffusion and chemical reactions on a three-dimensional mhd mixed convective flow of dissipative fluid along an infinite vertical porous plate with transverse sinusoidal suction velocity. the parabolic partial differential equations governing the fluid flow, heat transfer, and mass transfer were solved using perturbation technique and...

Journal: :معماری و شهرسازی 0
محمدجواد ثقفی استاد دانشکده معماری، پردیس هنرهای زیبا، دانشگاه تهران مجید حاجی زاده کارشناس ارشد انرژی و معماری، دانشکده معماری، پردیس هنرهای زیبا، دانشگاه تهران

thermal resistance of the external walls of buildings is highly important for reducing and optimizing the energy consumption needed for heating and cooling the buildings. identifying and evaluation of the thermal performance of common external wall systems can be very effective in improving the heat resistance. the hollow clay- block system extremely are in use in the iran construction system, ...

Laminar natural convection of Cu-water nanofluid between two horizontal concentric cylinders with radial fins attached to the inner cylinder has been studied numerically. The inner and outer cylinders are considered at constant temperature Ti and To respectively, with Ti>To. The governing equations with the corresponding boundary conditions have been solved by using the finite volume method....

The present study considers the numerical examination of an unsteady thermo-solutal mixed convection when the extra mass and heat diffusions, called as Soret and Dufour effects, were not neglected. The numerical simulations were performed in a lid-driven cavity, where the horizontal walls were kept in constant temperatures and concentrations. The vertical walls were well insulated. A finite vol...

Journal: :Transactions of the Japan Society of Mechanical Engineers 1978

2002
AHMED Y. GHALY ELSAYED M. E. ELBARBARY P. S. Gupta A. S. Gupta

We investigate the problem of free convection heat transfer near an isothermal stretching sheet. This has been done under the simultaneous action of buoyancy, radiation, and transverse magnetic field. The governing equations are solved by the shooting method. The velocity and temperature functions are represented graphically for various values of the flow parameters: radiation parameter F, free...

2018

Why heat and mass transfer ................................................................................................................................1 Fundamentals of heat transfer (what is it) ..........................................................................................................2 Thermodynamics of heat transfer ............................................................

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