Imperial College London

ProfessorSpencerSherwin

Faculty of EngineeringDepartment of Aeronautics

Professor of Computational Fluid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 5052s.sherwin Website

 
 
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Location

 

313BCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Moura:2016:10.1016/j.jcp.2016.10.056,
author = {Moura, RC and Mengaldo, G and Peiro, J and Sherwin, S},
doi = {10.1016/j.jcp.2016.10.056},
journal = {Journal of Computational Physics},
pages = {615--623},
title = {On the eddy-resolving capability of high-order discontinuous Galerkin approaches to implicit LES / under-resolved DNS of Euler turbulence},
url = {http://dx.doi.org/10.1016/j.jcp.2016.10.056},
volume = {330},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We present estimates of spectral resolution power for under-resolved turbulent Euler flows obtained with high-orderdiscontinuous Galerkin (DG) methods. The ‘1% rule’ based on linear dispersion–diusion analysis introduced byMoura et al. [J. Comput. Phys.298 (2015) 695–710] is here adapted for 3D energy spectra and validated throughthe inviscid Taylor–Green vortex problem. The 1% rule estimates the wavenumber beyond which numerical diusioninduces an artificial dissipation range on turbulent spectra. As the original rule relies on standard upwinding, dierentRiemann solvers are tested. Very good agreement is found for solvers which treat the dierent physical waves in aconsistent manner. Relatively good agreement is still found for simpler solvers. The latter however displayed spuriousfeatures attributed to the inconsistent treatment of dierent physical waves. It is argued that, in the limit of vanishingviscosity, such features might have a significant impact on robustness and solution quality. The estimates proposed areregarded as useful guidelines for no-model DG-based simulations of free turbulence at very high Reynolds numbers.
AU - Moura,RC
AU - Mengaldo,G
AU - Peiro,J
AU - Sherwin,S
DO - 10.1016/j.jcp.2016.10.056
EP - 623
PY - 2016///
SN - 0021-9991
SP - 615
TI - On the eddy-resolving capability of high-order discontinuous Galerkin approaches to implicit LES / under-resolved DNS of Euler turbulence
T2 - Journal of Computational Physics
UR - http://dx.doi.org/10.1016/j.jcp.2016.10.056
UR - http://hdl.handle.net/10044/1/42230
VL - 330
ER -