Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA

Bernard J. Geurts; Amirreza Rouhi; Ugo Piomelli

doi:10.1007/978-3-030-55594-8_5

Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA

Bernard J. Geurts^*, Amirreza Rouhi, Ugo Piomelli

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

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Abstract

Reliability assessment of large-eddy simulation (LES) of turbulent flows requires consideration of errors due to shortcomings in the modeling of sub-filter scale dynamics and due to discretization of the governing filtered Navier-Stokes equations. The Integral Length-Scale Approximation (ILSA) model is a pioneering sub-filter parameterization that incorporates both these contributions to the total simulation error, and provides user control over the desired accuracy of a simulation. The performance of ILSA, implemented as eddy-viscosity models, for separated turbulent flow over a backward-facing step is investigated here. We show excellent agreement with experimental data and with predictions based on other, well-established sub-filter models. The computational overhead is found to be close to that of a basic Smagorinsky sub-filter model.

Original language	English
Title of host publication	Advances in Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications
Subtitle of host publication	Proceedings of the IUTAM Symposium on Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications, June 18-22, 2018, Santorini, Greece
Editors	Marianna Braza, Kerry Hourigan, Michael Triantafyllou
Place of Publication	Cham, Switzerland
Publisher	Springer
Pages	31-41
Number of pages	11
ISBN (Electronic)	978-3-030-55594-8
ISBN (Print)	978-3-030-55593-1
DOIs	https://doi.org/10.1007/978-3-030-55594-8_5
Publication status	Published - 11 Feb 2021

Publication series

Name	Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Publisher	Springer
Volume	147
ISSN (Print)	1612-2909
ISSN (Electronic)	1860-0824

Keywords

2024 OA procedure
Large-eddy simulation
Reliability
Turbulence
ILSA modelling

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10.1007/978-3-030-55594-8_5

ArticleFinal published version, 429 KBLicence: Taverne

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Geurts, B. J., Rouhi, A., & Piomelli, U. (2021). Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA. In M. Braza, K. Hourigan, & M. Triantafyllou (Eds.), Advances in Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications: Proceedings of the IUTAM Symposium on Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications, June 18-22, 2018, Santorini, Greece (pp. 31-41). (Notes on Numerical Fluid Mechanics and Multidisciplinary Design; Vol. 147). Springer. https://doi.org/10.1007/978-3-030-55594-8_5

Geurts, Bernard J. ; Rouhi, Amirreza ; Piomelli, Ugo. / Turbulent Backward-Facing Step Flow : Reliability Assessment of Large-Eddy Simulation Using ILSA. Advances in Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications: Proceedings of the IUTAM Symposium on Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications, June 18-22, 2018, Santorini, Greece. editor / Marianna Braza ; Kerry Hourigan ; Michael Triantafyllou. Cham, Switzerland : Springer, 2021. pp. 31-41 (Notes on Numerical Fluid Mechanics and Multidisciplinary Design).

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title = "Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA",

abstract = "Reliability assessment of large-eddy simulation (LES) of turbulent flows requires consideration of errors due to shortcomings in the modeling of sub-filter scale dynamics and due to discretization of the governing filtered Navier-Stokes equations. The Integral Length-Scale Approximation (ILSA) model is a pioneering sub-filter parameterization that incorporates both these contributions to the total simulation error, and provides user control over the desired accuracy of a simulation. The performance of ILSA, implemented as eddy-viscosity models, for separated turbulent flow over a backward-facing step is investigated here. We show excellent agreement with experimental data and with predictions based on other, well-established sub-filter models. The computational overhead is found to be close to that of a basic Smagorinsky sub-filter model.",

keywords = "2024 OA procedure, Large-eddy simulation, Reliability, Turbulence, ILSA modelling",

author = "Geurts, {Bernard J.} and Amirreza Rouhi and Ugo Piomelli",

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Geurts, BJ, Rouhi, A & Piomelli, U 2021, Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA. in M Braza, K Hourigan & M Triantafyllou (eds), Advances in Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications: Proceedings of the IUTAM Symposium on Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications, June 18-22, 2018, Santorini, Greece. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 147, Springer, Cham, Switzerland, pp. 31-41. https://doi.org/10.1007/978-3-030-55594-8_5

Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA. / Geurts, Bernard J.; Rouhi, Amirreza; Piomelli, Ugo.
Advances in Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications: Proceedings of the IUTAM Symposium on Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications, June 18-22, 2018, Santorini, Greece. ed. / Marianna Braza; Kerry Hourigan; Michael Triantafyllou. Cham, Switzerland: Springer, 2021. p. 31-41 (Notes on Numerical Fluid Mechanics and Multidisciplinary Design; Vol. 147).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

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Geurts BJ, Rouhi A, Piomelli U. Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA. In Braza M, Hourigan K, Triantafyllou M, editors, Advances in Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications: Proceedings of the IUTAM Symposium on Critical Flow Dynamics Involving Moving/Deformable Structures with Design Applications, June 18-22, 2018, Santorini, Greece. Cham, Switzerland: Springer. 2021. p. 31-41. (Notes on Numerical Fluid Mechanics and Multidisciplinary Design). doi: 10.1007/978-3-030-55594-8_5

Turbulent Backward-Facing Step Flow: Reliability Assessment of Large-Eddy Simulation Using ILSA

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