| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 95 === The problem of two-dimensional steady state natural convection heat transfer in a rectangular enclosure filled with different fluids has been investigated numerically and experimentally. Use fortran of Jou[9] set up to 2D flow field analyse. It’s about putting the air, water, mixture fluids(water/EG) in a rectangular enclosure container which has two sides. One of it is Cooling Surface, another is Heating Surface, and others are Adiabatic Surfaces. In the numerical formulation, the effects of variable heat transfer of the fluids associated with temperature and gravity. The numerical simulations have been undertaken for the pertinent dimensionless parameters in the following ranges: the Grashof number Gr=103~106; the Prandtl number, Pr=0.71、6.2、62.4, It is air, water, mixture fluids(water/EG); degree(0°~360°); experimental consideration limited temperature difference along with angle of tilt (0°, 45°and315°) of natural convection phenomenon to air, water, mixture fluids. The experimental result is by laser watching stream function.
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