ISEC2005-76140 ...... (6)-3

NUMERICAL STUDY OF CONJUGATE HEAT TRANSFER IN A BIPV-THERMAL SYSTEM (6)-3

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MODEL DEVELOPMENT
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Numerical Schemes and Mesh Generation

k1y^$G&{`7E0    The governing Eqs. (1)-(8) with the given boundary conditions are solved by the control volume-based finite difference method using FLUENT 6.1. To facilitate numerical convergence the pressure-velocity coupling problem is solved using SIMPLEC; momentum, energy, turbulence kinetic energy and turbulence dissipation rate equations are solved using QUICK. The under-relaxation factors for pressure, momentum, turbulence kinetic energy and turbulence dissipation rate are set to 0.5, 0.7, 0.8 and 0.8, respectively. The convergence criteria are less than 10-4 for all equations and 10-8 for the energy equation. A non-uniform grid is utilized for boundary treatment as shown in Fig. 3; a large number of grid cells are placed at geometrically decreasing distances in the regions next to the walls where the largest gradients of velocity and temperature are expected.