角度离散对有限体积法辐射计算的影响

he finite volume method is applied for the radiation heat transfer in a quadrilateral enclosure containing absorbing and emitting medium. The effects of the internal angular discretization number and the pixel number at the boundary on the radiation calculation are investigated. The validity of the finite volume method code is verified since the calculated results match well with the exact values. With the increase of the internal angular discretization number, the precision is improved and the computational time increases. The increase of the pixel at the boundary leads to more computational time and little effect on the efficiency. Thus the selection of the number of the internal angular discretization and pixel should be based on practical situation.