Application of collocation spectral domain decomposition method to solve radiative heat transfer in 2D partitioned domains

- A collocation spectral domain decomposition method (CSDDM) for 2D RTE.
- The CSDDM for 2D RTE in partitioned domains.
- Continuity at the interface by the influence matrix technique.
- Direct solving by CSDDM in the iterative process.
- High order and accurate solution in complex geometries.

A collocation spectral domain decomposition method (CSDDM) based on the influence matrix technique is developed to solve radiative transfer problems within a participating medium of 2D partitioned domains. In this numerical approach, the spatial domains of interest are decomposed into rectangular sub-domains. The radiative transfer equation (RTE) in each sub-domain is angularly discretized by the discrete ordinates method (DOM) with the SRAPN quadrature scheme and then is solved by the CSDDM directly. Three test geometries that include square enclosure and two enclosures with one baffle and one centered obstruction are used to validate the accuracy of the developed method and their numerical results are compared to the data obtained by other researchers. These comparisons indicate that the CSDDM has a good accuracy for all solutions. Therefore this method can be considered as a useful approach for the solution of radiative heat transfer problems in 2D partitioned domains.