Effect of Inlet Width on Turbulent Flow in a Vented Cavity with an Isothermal Vertical Wall
Keywords:
Mixed turbulent convection, vented cavity, k-? modelAbstract
A two-dimensional, turbulent mixed convection flow in vented square cavity is investigated numerically using a computational fluid dynamics (CFD) Fluent code. The vented cavity walls were considered adiabatic, except the vertical wall on left, which was kept at high temperature than the ambient temperature. A low Reynolds number RNG based k-? turbulence model is used to solve the governing equations. Results are reported for a fixed Reynolds number (Re = 104) and for different Grashof numbers varied from 108 to 5.109. Different values of inlet width are tested: h=0.02, h=0.05, h=0.08 and h=0.1 m. Such convection inside a cavity is characterized by the formation of boundary layers along the heated wall with an encircled recirculating core region. The computed flow patterns, thermal field, variation of the local Nusselt number and the average Nusselt number are reported. It was concluded that flow behavior are changed by varying the inlet width for the same Grashof number.
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