Simulation of heat transfer in high speed microflows

摘要: The dynamic flow behavior and heat transfer characteristics of high speed gas flows through two-dimensional microchannels are investigated by using direct simulation Monte Carlo (DSMC) method. In order to study the effects Knudsen number (Kn) on fluid behaviors, in both slip regime transition have been investigated. collision process has treated a statistical way NTC (no-time-counter) scheme. VHS (variable hard sphere) model was chosen simulate from kinetic point view. different viscous produced Kn significantly influenced development also thermal boundary layers. bulk increase temperature due wall friction deceleration supersonic as it enters narrow channels, this dominates flux phenomenon. effect species properties studied helium nitrogen. It found that jump, flux, centerline for much higher compared No significant variable distribution were observed total amount transferred between channel walls.