Imperial College London
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ProfessorJoaquimPeiro

Faculty of Engineering, Department of Aeronautics

Professor of Engineering Computation
 
 
 
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Contact

 

j.peiro Website

 
 
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Location

 

214City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Moura:2017:10.1016/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 = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We present estimates of spectral resolution power for under-resolved turbulent Euler flows obtained with high-order discontinuous Galerkin (DG) methods. The ‘1% rule’ based on linear dispersion–diffusion analysis introduced by Moura et al. (2015) [10] is here adapted for 3D energy spectra and validated through the inviscid Taylor–Green vortex problem. The 1% rule estimates the wavenumber beyond which numerical diffusion induces an artificial dissipation range on measured energy spectra. As the original rule relies on standard upwinding, different Riemann solvers are tested. Very good agreement is found for solvers which treat the different physical waves in a consistent manner. Relatively good agreement is still found for simpler solvers. The latter however displayed spurious features attributed to the inconsistent treatment of different physical waves. It is argued that, in the limit of vanishing viscosity, such features might have a significant impact on robustness and solution quality. The estimates proposed are regarded 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  - 2017///
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  - https://www.sciencedirect.com/science/article/pii/S0021999116305642
UR  - http://hdl.handle.net/10044/1/42230
VL  - 330
ER  -
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