Energy dynamics modeling of commutator errors

F. van der Bos; Bernardus J. Geurts

Energy dynamics modeling of commutator errors

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

Abstract

For efficient large-eddy simulation of complex flow situations the use of non-uniform filter-widths is considered advantageous. It is, however, known that a non-uniform filter-width introduces additional SGS-terms, generally referred to as commutator-errors. The commutator-error can be associated with the creation and destruction of turbulent scales due to variations of the filter-width along Lagrangian flow-paths. A priori tests concerning the dynamics of kinetic energy have been carried out which confirm the validity of this idea. Consequently, a new model for the commutator-error has been developed. This model is tested on a turbulent temporal mixing layer at \mathrmRe=50.0 and \mathrmM=0.2 using a non-uniform filter-width in the non-homogeneous direction. This model, based on the energy dynamics of the commutator-error, is compared against more straight-forward formulations which represent the commutator-error in terms of the gradient and similarity model.

Original language	English
Title of host publication	Bulletin of the American Physical Society
Pages	119-119
Publication status	Published - 23 Nov 2003
Event	56th annual meetin of the Division of fluid dynamics: Bulletin of the American Physical Society - Duration: 23 Nov 2003 → 25 Nov 2003

Publication series

Name
ISSN (Print)	0003-0503

Conference

Conference	56th annual meetin of the Division of fluid dynamics
Period	23/11/03 → 25/11/03

Keywords

METIS-212871

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title = "Energy dynamics modeling of commutator errors",

abstract = "For efficient large-eddy simulation of complex flow situations the use of non-uniform filter-widths is considered advantageous. It is, however, known that a non-uniform filter-width introduces additional SGS-terms, generally referred to as commutator-errors. The commutator-error can be associated with the creation and destruction of turbulent scales due to variations of the filter-width along Lagrangian flow-paths. A priori tests concerning the dynamics of kinetic energy have been carried out which confirm the validity of this idea. Consequently, a new model for the commutator-error has been developed. This model is tested on a turbulent temporal mixing layer at \mathrmRe=50.0 and \mathrmM=0.2 using a non-uniform filter-width in the non-homogeneous direction. This model, based on the energy dynamics of the commutator-error, is compared against more straight-forward formulations which represent the commutator-error in terms of the gradient and similarity model.",

keywords = "METIS-212871",

author = "{van der Bos}, F. and Geurts, {Bernardus J.}",

year = "2003",

month = nov,

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language = "English",

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note = "56th annual meetin of the Division of fluid dynamics : Bulletin of the American Physical Society ; Conference date: 23-11-2003 Through 25-11-2003",

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T1 - Energy dynamics modeling of commutator errors

AU - van der Bos, F.

AU - Geurts, Bernardus J.

PY - 2003/11/23

Y1 - 2003/11/23

N2 - For efficient large-eddy simulation of complex flow situations the use of non-uniform filter-widths is considered advantageous. It is, however, known that a non-uniform filter-width introduces additional SGS-terms, generally referred to as commutator-errors. The commutator-error can be associated with the creation and destruction of turbulent scales due to variations of the filter-width along Lagrangian flow-paths. A priori tests concerning the dynamics of kinetic energy have been carried out which confirm the validity of this idea. Consequently, a new model for the commutator-error has been developed. This model is tested on a turbulent temporal mixing layer at \mathrmRe=50.0 and \mathrmM=0.2 using a non-uniform filter-width in the non-homogeneous direction. This model, based on the energy dynamics of the commutator-error, is compared against more straight-forward formulations which represent the commutator-error in terms of the gradient and similarity model.

AB - For efficient large-eddy simulation of complex flow situations the use of non-uniform filter-widths is considered advantageous. It is, however, known that a non-uniform filter-width introduces additional SGS-terms, generally referred to as commutator-errors. The commutator-error can be associated with the creation and destruction of turbulent scales due to variations of the filter-width along Lagrangian flow-paths. A priori tests concerning the dynamics of kinetic energy have been carried out which confirm the validity of this idea. Consequently, a new model for the commutator-error has been developed. This model is tested on a turbulent temporal mixing layer at \mathrmRe=50.0 and \mathrmM=0.2 using a non-uniform filter-width in the non-homogeneous direction. This model, based on the energy dynamics of the commutator-error, is compared against more straight-forward formulations which represent the commutator-error in terms of the gradient and similarity model.

KW - METIS-212871

M3 - Conference contribution

SP - 119

EP - 119

BT - Bulletin of the American Physical Society

T2 - 56th annual meetin of the Division of fluid dynamics

Y2 - 23 November 2003 through 25 November 2003

ER -