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کلیدواژهها
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Non-Newtonian Fluid,
Turbulent Flow, Nusselt
Number, Annular Pipe,
Porous Medium
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چکیده
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Porous materials are used in thermal devices such as heat exchangers to improvement
the heat transfer. The heat transfer of a non-Newtonian fluid flow in an annular
pipe with porous discs is numerically investigated in this paper. The flow regime in
both porous medium and clear region are considered to be turbulent. The effects of
power-law index of the non-Newtonian fluid and porous discs pitch variations on
the heat transfer rate, friction coefficient are studied and compared to each other
for two porous layer thicknesses. Finally, the thermal performance is defined which
determines the optimum porous media and non-Newtonian fluid characteristics in
the annular pipe.
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