In this world as there is increment growth in automobile industry also there is need to develop a high efficient vehicle which can take high speed performance with high stability. An improvement in high speed of a vehicle depends upon amount of drag force subjected to a vehicle and it has adverse effect of increment in energy consumption of the vehicle. Since the testing using Wind tunnel is expensive and time consuming, it is required to develop some effective numerical methods. The paper states to provide a CFD based aerodynamic analysis of an object which could be useful for determining and reduction of drag force for the passenger car by the application of ANSYS Fluent software. Critical aerodynamic quantities to be observed for such a system are the distributions of pressure, the contours of velocity and the wake and streamlines in relation to a vehicle. To provide an efficient prediction such critical quantities are given with relevant turbulence models and boundary conditions as velocity inlet, pressure outlet and no slip wall condition. Pre-processing for such a problem can be defined as geometry creation, domain creation and meshing. The obtained results based on the experiment show that the redesign of the geometry has reduced the value of coefficient of drag. Such CFD methodology to provide cost effective and efficient car analysis prior to any physical prototype can be implemented in latest car designing.
S et al. (Thu,) studied this question.