Title: Aerodynamic Simulations by Using Discontinuous Interface Grid and Solution Adaptive Grid Method
text: Aerodynamic simulations of automobiles with an airflow type rear spoiler (a spoiler that guides part of the flow on the roof onto the rear window of a one-box or two-box car to reduce the adhesion of snow or dust on the rear window) using a discontinuous interface grid method and around a rear view door mirror using a solution adaptive grid method are presented. These new methods have made it possible to capture the detail phenomena around equipment items such as spoilers and door mirrors, thereby improving the accuracy of the CFD (Computational Fluid Dynamics) simulations and shortening the time required.