Parallel finite element simulation for orographic wind flow and rainfall using GIS data

We present a computational technique based on the finite element method for the orographic wind flow and rainfall. The governing equations are the unsteady Navier-Stokes equations based on Boussinesq approximation and the Kessler model for warm rain. The SUPG/PSPG method is employed for the stabilization method. The automatic mesh generation method using GIS data is utilized to develop an accurate geographic model. The present method is applied to the analysis of orographic wind flow and rainfall past a semicircular hill and an actual mountain area