Analysis of Flow over Passenger Cars using Computational Fluid Dynamics

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2015 by IJETT Journal
Volume-29 Number-4
Year of Publication : 2015
Authors : P Ramya, A Hemanth Kumar, Jaswanth Moturi, N.Ramanaiah
DOI :  10.14445/22315381/IJETT-V29P232


P Ramya, A Hemanth Kumar, Jaswanth Moturi, N.Ramanaiah"Analysis of Flow over Passenger Cars using Computational Fluid Dynamics", International Journal of Engineering Trends and Technology (IJETT), V29(4),170-176 November 2015. ISSN:2231-5381. published by seventh sense research group

One of the ongoing automotive technological developments is in the area of reduction of aerodynamic drag, because this has direct impact on fuel reduction. The present work consists of mainly determining the flow regime over vehicles and further evaluating the drag force and coefficient of drag using CFD analysis. For this analysis, two modern passenger cars- SEDAN&SUV models were considered.The analysis was carried out for velocities ranging from 30kmph to 120kmph. The analysis was further extended to study the effect of adding a spoiler on both the models. A 3-D model of passenger car was drawn by using a snapshot of the actual vehicle. The snapshot was further developed by using AUTOCAD and CATIA-V5 software’s. Further a control volume over the vehicle is also developed using the same software and the total model was imported into ANSYS workbench for CFD analysis. The results obtained in the form of drag force and drag coefficient are compared. It has been observed that the sedan model had lower drag. It was further found from the study that the addition of a spoiler has a minimal effect on the drag induced.


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CFD, sedan, SUV, drag force.