Week 3 - External flow simulation over an Ahmed body.

The flow region which presents the major contribution to a car’s drag, and which poses severe
problems to numerical predictions and experimental studies as well, is the wake flow behind
the car. The location at which the flow separates determines the size of the separation zone,
and consequently the drag force. Clearly, a more exact simulation of the wake flow and of the
separation process are essential for the correctness of drag predictions. However, a real-life
automobile is a very complex shape to model or to study experimentally. Therefore the
MOVA consortium partners (TU Delft, University of Manchester, LSTM, Electricite de
France, AVL List, and PSA Peugeot Citroen) agreed to study the vehicle shape employed by
Ahmed known as the Ahmed body.