Abstract: An improvement on the Discrete Ordinate Method (DOM)-‘divide and rule’is shown. The tiny dominated body is plotted into districts according to the projection relation between the interfaces in the radiative heat-transfering direction. The radiative intensity of the subsidiary dominated bodies is solved after an integral to the radiative heat-transfering equation in the radiative heat-transfering direction. In the new DOM, the average volume is regarded as the final radiative intensity of the nodes. Numerical simulation is performed on the process of radiative heat-transfer in a three-dimension rectangular furnace. Compared with the traditional DOM and the district method, numerical results indicate that the new DOM solves the fake scattering preferably, and ameliorates the precision of the calculation as well.

Key words: radiative heat-transfer, discrete ordinate method, fake scatter, divide and rule