Micro/Nano Channels


We used DSMC to simulate subsonic flow with and without choking in micro/nano scale channels, see Fig. 1. After full validation of our simulation, we considered flow subject to different thermal wall boundary conditions. It was observed that gas heating would increase the compressibility effects in the channel and would augment the nonlinearity in axial pressure distribution. Alternatively, a negative heat flux wall boundary condition yields a linear decrease in the centerline and wall temperatures in low compressible flows.


Fig. 1. Geometry of the Channel and its outlet buffer



Fig. 2. Mach without bufferzone (top), and with buffer zone (bottom)

Last Updated on Monday, 16 January 2012 22:50
    ResearchGate  ResearchGate