Kinetic theory of simple reacting spheres

Abstract

Dilute and dense gas Enskog theory calculations are reported for a fluid composed of simple reacting spheres. Results for the dilute gas provide qualitative confirmation of previous calculations based on the MIRS (multiple interaction, reacting sphere) model. At high densities the viscosity and ’’empirical’’ diffusion coefficients vary almost linearly with the heat of reaction. The diffusion coefficients associated with the collisional transfer or ’’surface reaction’’ contributions to the component mass fluxes depend very strongly on density. For small heats of reaction and large densities this novel mechanism can completely overshadow regular diffusion. The transport coefficients associated with this surface reaction term fall into two categories, those with numerical values which tend to zero for large heats of reaction and those which increase rapidly as the exothermicity rises. The mass fluxes of reaction products belong to the latter category.