Poster Presentation

Mr. Thomas Schuetz, FKFS, Germany
Dr. Timo Kuthada, FKFS, Germany
Prof. Jochen Wiedemann, FKFS, Germany
Dr. Gerhard Wickern, Audi AG, Germany

This paper describes the CFD simulation and validation of automotive brake disk cooling-down processes during a defined braking cycle at a medium-class sedan. Using the CFD-Code EXA PowerFLOW 4.0, the air flow pattern around a fully detailed car geometry has been calculated. Wheel rotation has been taken into account via MRF modeling. Mean values of the heat transfer coefficient and the convective heat flux are presented and used to calculate cooling-down times. Starting with a baseline configuration, some additional geometrical modifications have been investigated. To demonstrate a sufficient accuracy of the computation, all computational results are compared with measurements conducted in the Thermal Wind Tunnel and the Aero-Acoustic Wind Tunnel of Stuttgart University.

Poster presentation: Simulation and testing