Numerical Investigation of Road Vehicle Aerodynamics Using the Immersed Boundary RANS Approach The Pennsylvania State University

Format:

Conference/Event

Author/Creator:

Jindal, Shailesh, author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

This paper describes the computational results of the flow field around two vehicle geometries using the Immersed Boundary (IB) technique in conjunction with a steady RANS CFD solver. The IB approach allows the computation of the flow around objects without requiring the grid lines to be aligned with the body surfaces. In the IB approach instead of specifying body boundary conditions, a body force is introduced in the governing equations to model the effect of the presence of an object on the flow. This approach reduces the time necessary for meshing and allows utilization of more efficient and fast CFD solvers. The simulations are carried out for an SUV and a pickup truck models at a Reynolds number of 8105. Cartesian meshes (non-uniform) with local grid refinement are used to increase the resolution close to the boundaries. The simulation results are compared with the existing measurements in terms of surface pressures, velocity profiles, and drag coefficients. The comparisons between the simulation results and the time-averaged measurements revealed that the CFD calculations were able to track the flow trends very well. Furthermore, the CFD simulations predicted the drag coefficients for the SUV and the pickup truck models within 6% of the measured values

Notes:

Vendor supplied data

Publisher Number:

2005-01-0546

Access Restriction:

Restricted for use by site license