Radiative heat transfer calculation for mixture of gases using full spectrum k-distribution method

Abstract

The full spectrum k-distribution method is used to obtain radiative heat flux and divergence of radiative heat flux for two test cases, containing mixture of CO 2 and H 2 O at different concentration and temperature keeping pressure constant. The k-distribution for mixture of gases is obtained from individual gas k-distribution using three different mixing models, viz., superposition, multiplication and hybrid model. Further, the radiative transfer equation (RTE) is solved by the finite volume discrete ordinate method (FVDOM) to obtain the radiative flux and the radiation source term. The results obtained were compared with the FSK from spectral addition and LBL method. The multiplication mixing model provides better accuracy compared to other mixing models considered in the present study.

Estimation of thermal load on the nozzle base plate from small plumes at high temperature

“…Spectral line weight sum of gray gases [16] etc. The accuracy of the above methods is well demonstrated for uniform composition of gases [17,18], however, the variation in composition of gaseous and their mixture poses another level of challenge and further modelling is required [19]. In order to use look up The fvDOM numerical method is used for solution of RTE coupled with fluid flow using a pressure based compressible flow application sonicRadFoam, modified from sonicFoam application of OpenFOAM [20].…”