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Hybrid Tuned Center Difference - WENO Method for Large Eddy Simulations in the Presence of Strong Shocks

Hill, D. J. and Pullin, D. I. (2003) Hybrid Tuned Center Difference - WENO Method for Large Eddy Simulations in the Presence of Strong Shocks. ASCI Technical Report, ASCI-TR170. . (Unpublished)

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We develop a tuned center-difference (TCD) scheme optimized for large-eddy simulations (LES) using a method proposed by Ghosal. For LES of weakly compressible decaying turbulence, these optimized stencils are shown to provide superior performance when compared to higher-order centered schemes with the same stencil width. A hybrid method combining the TCD stencil with a weighted essentially non-oscillatory (WENO) method is then constructed for use in the LES of strongly compressible, shock-driven flows. The user-specified, optimum WENO weights are chosen to match those of the TCD scheme. It is expected that these weights will be achieved automatically in regions of smooth flow away from shocks, but in practice a switch is found to be necessary. The hybrid TCD–WENO scheme is shown to work well for unsteady gas-dynamic flows in one and two dimensions.

Item Type:Report or Paper (Technical Report)
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Additional Information:This work was supported by the Academic Strategic Alliances Program of the Accelerated Strategic Computing Initiative (ASCI/ASAP) under subcontract no. B341492 of DOE contract W-7405-ENG-48.
Group:Accelerated Strategic Computing Initiative, GALCIT
Funding AgencyGrant Number
Department of Energy (DOE)B341492
Department of Energy (DOE)W-7405-ENG-48
Series Name:ASCI Technical Report
Issue or Number:ASCI-TR170
Record Number:CaltechAUTHORS:20230209-233611005
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:119124
Deposited By: George Porter
Deposited On:10 Feb 2023 00:51
Last Modified:10 Feb 2023 00:51

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