Abstract
The blocked-off based finite volume method for the radiation heat transfer problem has an obvious shortcoming that yields oscillating radiative heat flux on complex walls when using structured grids. This work aims to improve the accuracy of the blocked-off model by using a boundary radiation intensity interpolation method. The new method is validated for inclined and curved walls, and the predicted radiative heat flux has almost no fluctuations with great accuracy. This improved method works well for optically thin, moderate and thickness conditions. The deviation in radiative heat flux decreases from about 10% to less than 1% compared to previous schemes.
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