CFD Simulation And Validation Of Aerodynamic Over Ahmed Model

Roslina Aida, Rahimi (2008) CFD Simulation And Validation Of Aerodynamic Over Ahmed Model. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, computational Fluid Dynamics (CFD) method is widely used as a tool to virtually analyze the external flow problem. However, when it come to vehicle aerodynamics , the visibility of the CFD approach as a virtual wind tunnel to substitute physical wind tunnel has not yet been recognized. Hence, this project revealed the capability of a CFD tool to predict the aerodynamic characteristic of a vehicle. In this project, a simplified vehicle model called Ahmed model was chosen. The result is validated as CD's value for CFD is 0.50 while for experiment wind tunnel is 0.54. It had proven that Spalart-Allmaras able to validate data between numerical and experimental method with only 7.4% different between both method used. Thus, the capability and consistency of the Spalart-Allmaras equation proof its potential in developing automotive industries.

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