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Advances in Acoustics and Vibration
Volume 2016, Article ID 4785389, 17 pages
Research Article

CAA of an Air-Cooling System for Electronic Devices

1Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstr. 4, 91058 Erlangen, Germany
2SIMetris GmbH, Am Weichselgarten 7, 91058 Erlangen, Germany
3Vienna University of Technology, Getreidemarkt 9, 1060 Wien, Austria

Received 4 July 2016; Revised 31 August 2016; Accepted 7 September 2016

Academic Editor: Marc Thomas

Copyright © 2016 Sven Münsterjohann et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the workflow and the results of fluid dynamics and aeroacoustic simulations for an air-cooling system as used in electronic devices. The setup represents a generic electronic device with several electronic assemblies with forced convection cooling by two axial fans. The aeroacoustic performance is computed using a hybrid method. In a first step, two unsteady CFD simulations using the Unsteady Reynolds-Averaged Navier-Stokes simulation with Shear Stress Transport (URANS-SST) turbulence model and the Scale Adaptive Simulation with Shear Stress Transport (SAS-SST) models were performed. Based on the unsteady flow results, the acoustic source terms were calculated using Lighthill’s acoustic analogy. Propagation of the flow-induced sound was computed using the Finite Element Method. Finally, the results of the acoustic simulation are compared with measurements and show good agreement.