Solution of train-tunnel entry flow using parallel computing

A solution to the problem of predicting the airflow over a train entering a tunnel is presented using parallel processing and a novel moving boundary condition scheme. The moving boundary condition approach avoids some of the topological problems of traditional approaches to this problem such as ALE techniques and contact surfaces. The method is demonstrated using both incompressible and compressible flow solvers based on the GLS finite element formulation. Flow solutions are compared with experiment for a simple geometry and the method is demonstrated on an actual train geometry.