High-precision Format Of Three-dimensional Incompressible Viscous Flow Solver

The paper uses a high order method to solve incompressible viscous complex flows based on a domain decomposition and matched method,, The primitive variable and pressure Poisson equation formulation are employed for the numerical solutions of the incompressible Navier-Stokes equations, in tensor forms, on non-staggered grids. The momentum equations are integrated in time using the four-stage explicit Jameson Runge-Kutta algorithm and discretized in space using fourth order accurate compact scheme as well as the pressure Poisson equation. In order to satisfy the continuity constraint and ensure the smoothness of pressure field, an optimum way to derive a discrete pressure equation is used.This paper develops a numerical simulation software for the numerical solutions of the three-dimensional incompressible viscous flows. The software is based on the personal computers' Windows operation system and utilizes the domain decomposed and matched method and algorithm presented above. Some initial steps on graphics user interface, pre-process and post-process for the CFD(Computational Fluid Dynamics) application software have been carried out. And the software is applied to calculate the flows in three-dimensional 90?bend duct with circular section.