The spectral-element and pseudo-spectral methods: A comparative study

Ohlsson J, Schlatter P, Mavriplis C, Henningson DS (2011)

Publication Type: Conference contribution

Publication year: 2011

Journal

Lecture Notes in Computational Science and Engineering Springer Verlag

Book Volume: 76 LNCSE

Pages Range: 459-467

Conference Proceedings Title: Lecture Notes in Computational Science and Engineering

Event location: NOR

ISBN: 9783642153365

DOI: 10.1007/978-3-642-15337-2_44

Abstract

Turbulent and transitional channel flow simulations have been performed in order to assess the differences concerning speed and accuracy in the pseudo-spectral code simson and the spectral-element code nek5000. The results indicate that the pseudo-spectral code is 4-6 times faster than the spectral-element code in fully turbulent channel flow simulations, and up to 10-20 times faster when taking into account the more severe CFL restriction in the spectral-element code. No particular difference concerning accuracy could be noticed either in the turbulent nor the transitional cases, except for the pressure fluctuations at the wall which converge slower for the spectral-element code. © 2011 Springer.

Authors with CRIS profile

Philipp Schlatter

Involved external institutions

Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) SE Sweden (SE) University of Ottawa CA Canada (CA)

How to cite

APA:

Ohlsson, J., Schlatter, P., Mavriplis, C., & Henningson, D.S. (2011). The spectral-element and pseudo-spectral methods: A comparative study. In Lecture Notes in Computational Science and Engineering (pp. 459-467). NOR.

MLA:

Ohlsson, J., et al. "The spectral-element and pseudo-spectral methods: A comparative study." Proceedings of the 8th International Conference on Spectral and High Order Methods, ICOSAHOM'09, NOR 2011. 459-467.

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