Abstract

Natural convection and radiation heat transfer in a square enclosure containing absorbing, emitting, and isotopically scattering(participating) media is studied numerically using the finite volume method. Various numerical methods are employed to analyze the radiative heat transfer. However, it is very difficult to choose the proper method. In present study, a finite volume method(FVM) and a discrete ordinates method(DOM) are compared in rectangular enclosure. The SIMPLER algorithm is used to solve the momentum and energy equations. Thermal and flow characteristics are investigated according to the variation of radiation parameters such as optical thickness and scattering albedo. The result shows that the accuracy and the computing time of FVM are better than those of DOM in regular geometry.

Keywords

• Rectangular enclosure;
• Radiative heat transfer;
• Finite volume method;
• Discrete ordinates method;
• Participating medium

• 사각밀폐공간;
• 복사열전달;
• 유한체적법;
• 구분종좌표법;
• 참여매질;