The Spectral-Element and Pseudo-Spectral Methods: A Comparative Study
2011 (English)In: Spectral and High Order Methods for Partial Differential Equations: Selected papers from the ICOSAHOM '09 conference, June 22-26, Trondheim, Norway / [ed] Jan S. Hesthaven; Einar M. Rønquist, Springer , 2011, 1, 459-467 p.Chapter in book (Other academic)
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.
Place, publisher, year, edition, pages
Springer , 2011, 1. 459-467 p.
, Lecture Notes in Computational Science and Engineering, ISSN 1439-7358 ; 76
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-25929DOI: 10.1007/978-3-642-15337-2_44ScopusID: 2-s2.0-78651552857ISBN: 978-3-642-15336-5OAI: oai:DiVA.org:kth-25929DiVA: diva2:360891
QC 201011052010-11-052010-11-052011-12-06Bibliographically approved