Abstract
When hazardous substance is diffused, it is necessary to identify pollutant source immediately. Reverse simulation, which is the solution of the transport equation in negative time, is useful method for identifying pollutant source with CFD. Then the negative diffusion simplifies dispersive errors and reverse simulation cannot be carried out. We introduced a method to improving numerical instability. In this paper, we introduce reverse simulation result in cavity flow and survey the dependence of reverse simulation accuracy on grid resolution and filter width.
