Influences of side wall angle on heat transfer of power-law fluids in trapezoidal enclosures (original) (raw)
In recent years, there is an important increase in technological applications of non-Newtonian fluids (NNF). NNFs are preferred over Newtonian fluids (NF) because of their superior hydrodynamic and thermal properties. NNFs are particularly used as damping fluid in shock absorbers, raw material for making of armors in defense industry and insulator in thermal systems. The use of NNF has become widespread in thermal systems in order to prevent over-heating problem which affects the efficiency. This study presents a numerical analysis for the natural convection in a two dimensional trapezoidal (isosceles trapezoid) enclosure filled with powerlaw NNF. The effects of various parameters are investigated on heat transfer on the bottom wall by developing a two dimensional model of such a cell. The bottom edge of the trapezoidal enclosure is considered as hot, top edge as cold while the side walls are considered as adiabatic. The considered parameters are power-law index (n) and Rayleigh num...
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