THE DEPENDENCE ON GRID RESOLUTION AND FILTER WIDTH OF REVERSE SIMULATION FOR IDENTIFYING POLLUTANT SOURCE

Analysis object is cavity flow

Abstract

Reverse simulation, which is the solution of the transport equation in negative time, is a method for identifying pollutant source with CFD. Then the negative diffusion amplifies numerical errors and reverse simulation cannot be carried out. We proposed a method for improving numerical stability ⁽⁹⁾. This method applies a low-pass filter operation to concentration flux in RANS (Reynolds averaged numerical simulation)
In this paper, for application of actual problems, we introduce reverse simulation result in cavity flow, which has greatly-bent streamline and forms complex flow. In addition, we survey the dependence of reverse simulation accuracy on grid resolution and filter width.