The Spectra of Single Reactants in Homogeneous Turbulence

摘要: A closure is proposed which appropriate for a numerical study of the spectrum single, chemically-reactive species in turbulence. The objective to predict effect moderate rate reaction kinetics on scalar spectra situations fluid density not significantly affected by reaction. method approach use Fourier transform two-point probability function as primary independent variable whose evolution from an initial state computed. Two approximations are needed, one turbulent transport and molecular diffusion. We propose EDONM-style spectral represent former cluster expansion due Lundgren latter. These two closures combined preserve almost all realizability constraints system except coincidence property functions. Preliminary calculations have been made no-reaction limit reproduce previous results. Computations linear kinetic under way with expectation that results can be compared flux cascade predictions. More general will also investigated.