Example: Ahmed Body

The Ahmed Body is a geometric shape used during the early development of aerodynamic simulation software back in the 1980’s [1]. Despite its relatively simple shape, the Ahmed Body exhibits a number of predictable airflow features and quickly became a standard benchmark that is still used today. We are using it here for our second example to show a solution with full three-dimensional airflow. This example will mirror many of the same steps as the wing section, with the addition of mesh-refinement regions. We presume you have already completed the Example: Wing Section section and have some familiarity with the menus and view panels.

• Create a Project
• Import the Target Geometry
• Set the Wind Tunnel Geometry
• Refine the Block Mesh
• Mesh the Target Geometry
• Run the icoFoam Solver
• Display the Pressure Field
• Display the Velocity Field
• Close the Project

Note

Screenshots in this section were taken from modelbuilder running on a linux (Ubuntu) desktop machine.

[1]

Ahmed, S., Ramm, G., and Faltin, G., “Some Salient Features Of The Time-Averaged Ground Vehicle Wake,” SAE Technical Paper 840300, 1984, https://doi.org/10.4271/840300.