An upstream flux splitting method for hydrodynamic modeling of deep submicron devices

In this study, we apply the advective upstream splitting method (AUSM) to the hydrodynamic equations to examine its capability for simulation of the deep submicron devices. The numerical flux in the AUSM is separated into the convective and pressure-like contributions at the cell interface. The convective fluxes are carried by the carrier average velocity but the pressure-like flux is governed by the carrier random velocity. Discretization of these two physically distinct fluxes is thus performed separately in AUSM. In this study, hydrodynamic and Poisson´s equations are solved self-consistently for electrons in the n-channel MESFET with a gate length of 0.1 /spl mu/m using the AUSM.