Heat and mass transfer in the initial microchannel section with chemical conversions of methane in water vapor

The Navier–Stokes equations for a laminar flow of a compressible multispecies gas have been used to model numerically the heat and mass transfer processes in high-temperature chemical reactions of methane in water vapor with activation of reactions on the microchannel walls and external heat supply. The temperature and concentration fields are obtained, as well as the distributions of heat fluxes, reacting species, and local coefficients of heat and mass transfer along the channel. It is shown that a high degree of chemical conversion leads to nonmonotonical changes in reaction rates and velocities of transverse heat flows, and species along the microchannel, considerably affecting the local coefficients of heat and mass transfer.