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The Bmc/Giem Model For Micromixing In Non-Premixed Turbulent Reacting Flows, Rodney O. Fox, Kuochen Tsai
The Bmc/Giem Model For Micromixing In Non-Premixed Turbulent Reacting Flows, Rodney O. Fox, Kuochen Tsai
Rodney O. Fox
A novel beta mapping closure (BMC)/generalized IEM (GIEM) model is proposed to close the micromixing term in the joint composition probability density function (PDF) transport equation for nonpremixed, multiscalar turbulent reacting flows. Because the beta PDF gives an excellent description of binary inert scalar mixing, it is used to approximate the mixture fraction PDF. The proposed model thus effectively extends presumed PDF methods to handle finite-rate chemistry without introducing ad hoc assumptions about the form of the joint composition PDF. The BMC/GIEM model can be solved efficiently using a particle-based Monte-Carlo code. The model is first compared with the amplitude …