非定常過程における水平正方形等温加熱流路内の三次元複合対流熱伝達

概要

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The flow and heat transfer characteristics of the mixed convection in a horizontal square duct, whose side walls and bottom wall are heated in uniform temperature and upper wall is insulated thermally, are examined numerically in three-dimensional system and transient process. The SIMPLE algorithm and QUICK scheme are applied to solve the governing equations through a control volume. The working fluid is water, and the temperature dependence of kinetic viscosity ν and thermal conductivity λ of water is considered in this analysis. Numerical results show that the reverse flow, the spiral flow and two-recirculating flows appear on the upper wall, along the flow direction and near the bottom wall, respectively. The local Nusselt numbers are presented corresponding to the transient flow behavior.
2011-07-01