The experimental test rig. The first test case is the radiant exchange from an absorbing and emitting grey gas at a constant temperature within a cylindrical enclosure. Shown in the figure below is a comparison of the exact solution with a solution obtained with the Finite Volume method. In the calculations with the Finite Volume method the angular space was discretized with 17 points in the polar and azimuthal directions. The spatial grid contained 17 and 25 points in the radial and axial directions and the grid was clustered near the cylinder wall where the gradients in intensity are highest.
Good agreement is obtained.
Non-dimensional radiant heat transfer along the side wall of a cylindrical enclosure. The cylinder contains an emitting, absorbing gas at a uniform temperature. Calculations were performed for three values of the absorption coefficient using the Finite Volume technique. A higher order scheme for interpolation of the cell face intensity from the cell center values will be implemented and compared with the present 1st order interpolation scheme. The radiant intensity due to combustion gases will be calculated for several cases to assess the accuracy of the modeling.