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Numerical simulation of Biogas combustion by using a finite volume based multi-species transport model


 In this paper, we advocate the use of multi-species transport model coupled to global mechanisms instead of using detailed mechanisms, which are still not yet computational affordable for the majority of the research groups in Africa. The open source software OpenFOAM is used as the calculation platform. The obtained algorithm is validated by comparing its simulation results to the full GRI-3.0 mechanism based simulations of Charest et al.[1] with quite satisfactory agreement for methane flames diluted with CO2. The new code is then used to investigate the axial flame temperature of locally produced biogases from pig slurry and cow dung respectively named BG L1, BG L2, BG B1 and BG B2. These biogases differ from each other in their composition. Methane proportion in the mixture ranges from 46 to 52 %.