辐射换热球面微元对称等分离散坐标法

SPHERICAL SURFACE SYMMETRICAL EQUAL DIVIDING DISCRETE ORDINATES METHOD FOR RADIATIVE HEAT TRANSFER

基于优化计算几何原理 ,提出了球面微元对称等分 (sphericalsurfacesymmetricalequaldividing ,SSDN)离散坐标方法 .经双动量矩检验计算及有精确解的辐射换热计算 ,与传统的、精度较高的几种方法相比 ,SSDN 的精度较高 ,某些N取值的SSDN 方法精度甚至高于SN 方法 .关于计算迭代次数的比较表明 ,SSDN

Based on the optimum numerical geometry of a sphere, a new angular quadrature scheme named Spherical surface Symmetrical equal Dividing (abbreviated to SSDN) was presented. The evaluations of double moment by SSDN and other traditional quadrature sets showed that the new SSDN could provide good accuracy and compared well with others such as the SN with the highest accuracy. Radiative heat transfer predictions in a black-walled rectangular enclosure containing absorbing-emitting medium indicated that, compared with SN, TN and SRAPN, the SSDN could give almost as high or even accuracy as the SN does under some order numbers N. The numerical experiments of iteration comparison high lighted the feature of SSDN of computational economy.