2D Navier–Stokes Simulations of Microscale Viscous Pump With Slip Flow

摘要: In this paper we provide numerical solution of the Navier―Stokes equations coupled with energy equation for gaseous slip flow in two-dimensional microscale viscous pumps. A first-order boundary condition was applied to all internal solid walls. The objectives are study performance pumps and effect velocity on its performance. Mass rate pump efficiency were calculated various operation conditions when an external pressure load is at exit plane. Geometric parameters held fixed work. Microviscous studied detail several values Reynolds number, load, eccentricity, factors. Our results no-slip compared previously published experimental data found be very good agreement. Slip eccentricity major that affect pump. Pump head decreases increasing Maximum increases factor up Kn approaching 0.1. However, maximum value experience a steep degradation moment coefficient always decrease as both distance rotor from lower wall increase. Also, factors increase, less net ffow predicted. For given fired driving force surface, there optimum behavior wall. Future research should conducted modify current design make concept work higher Knudsen number.