C103 UNSTRUCTURED FINITE VOLUME METHOD FOR RADIATIVE HEAT TRANSFER IN A COMPLEX TWO-DIMENSIONAL GEOMETRY WITH OBSTACLES(Radiation)

概要

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Radiative heat transfer in a complex two-dimensional participating medium with is very important in practical engineering applications. In order to deal with this problem, the finite volume method (FVM) for radiation has been derived using the unstructured grid system. For its comparison and validation, two test cases such as an equilateral triangular enclosure and a square enclosure with baffle were chosen. Then, more complex and practical case such as a square enclosure with finned internal cylinder was investigated. All the results obtained by the unstructured FVM agreed very well with the exact solutions as well as the results obtained by the zone method. Furthermore, the wiggling behavior occurring in the blocked-off FVM was not produced by the unstructured FVM. Three types of manipulation of control angle overlap were also examined here. It was found that the solutions depended on the type of manipulation of control angle overlap especially when the number of control angles was small. Usually, both the pixelation method and exact treatment introduced here yielded better solutions than the bold approximation.
一般社団法人日本機械学会の論文
2000-10-01