NATURAL-CONVECTION OF MICROPOLAR FLUIDS IN AN ENCLOSURE WITH HEAT-SOURCES

Numerical study of natural convection flow in a tilling enclosure fill ed with micropolar fluids has been investigated. The enclosure is equi pped with a single or multiple uniform heat sources: A two-dimensional , steady and laminar how model is simulated. The heat transfer charact eristic and how phenomenon are presented for range values of the contr olled parameters and situations, such as Ra number, tilting angle of t he enclosure and Various material parameters of the fluid. The results indicate that dependence of microrotation term and heat transfer on m icrostructure parameters is significant. The effects of heat source lo cations and arrangement of multiple heat sources are studied to arrive at qualitative suggestions that may improve the cooling design of the system. The effect of the microrotation boundary conditions on heat t ransfer is discussed as well. (C) 1997 Elsevier Science Ltd.