Comparison of les studies in backward-facing step using chebyshev multidomain and legendre spectral element methods

F. Mashayek, K. Sengupta, G. B. Jacobs, Paul Fischer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Large-eddy simulation (LES) has been increasingly applied to complex shear flows encountered in practical engineering devices. Here, we present the comparison of LES studies performed using the explicit Chebyshev multi-domain method and the semi-implicit Legendre spectral element method. Two different backward-facing step configurations are simulated at Reynolds numbers 5000 and 28,000. A grid resolution study at Re = 28,000 is carried out to compare the number of spectral elements required by the two spectral methods to resolve the flow field. Effect of synthetic turbulence at inflow is investigated using two techniques of generating inflow turbulence at Re = 28, 000. In the LES study at Re = 5000, it is observed that a semi-implicit method requires small time step size to correctly predict transition to turbulence.

Original languageEnglish (US)
Title of host publication20th AIAA Computational Fluid Dynamics Conference 2011
StatePublished - 2011
Externally publishedYes
Event20th AIAA Computational Fluid Dynamics Conference 2011 - Honolulu, HI, United States
Duration: Jun 27 2011Jun 30 2011

Other

Other20th AIAA Computational Fluid Dynamics Conference 2011
CountryUnited States
CityHonolulu, HI
Period6/27/116/30/11

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering

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    Mashayek, F., Sengupta, K., Jacobs, G. B., & Fischer, P. (2011). Comparison of les studies in backward-facing step using chebyshev multidomain and legendre spectral element methods. In 20th AIAA Computational Fluid Dynamics Conference 2011