Based on the optimum numerical geometry of a sphere

a new angular quadrature scheme named Spherical surface Symmetrical equal Dividing(abbreviated to SSD N ) was presented.The evaluations of double moment by SSD N and other traditional quadrature sets showed that the new SSD N could provide good accuracy and compared well with others such as the S N with the highest accuracy.Radiative heat transfer predictions in a black-walled rectangular enclosure containing absorbing-emitting medium indicated that

compared with S N

T N and SRAP N

the SSD N could give almost as high or even accuracy as the S N does under some order numbers N .The numerical experiments of iteration comparison higs lighted the feature of SSD N of computational economy.