A new physically-based fully-realizable nonequilibrium reynolds stress closure for turbulent Flow RANS modeling

Peter E. Hamlington, Werner Dahm

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Based on the physics underlying turbulence anisotropy in the equilibrium and nonequilibrium limits, a new physically-based, fully-realizable, nonequilibrium k -ε RANS model has been developed. The model is based on an effective strain rate tensor that accounts for the strain history to which the turbulence has been subjected. This new model is applied to four distinctly different test cases for which the nonequilibrium history integral can be evaluated analytically. Results obtained from this new closure model show dramatically improved agreement with experimental and computational data when compared with the standard k -ε (SKE) model, without the need to vary any model parameters. The introduction of a nonequilibrium effective strain rate allows this new model to be applied within a similar framework as currently used for two-equation eddy viscosity models, thereby permitting relatively simple implementation in existing CFD codes.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Pages5548-5567
Number of pages20
Volume6
StatePublished - 2007
Externally publishedYes
Event43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference - Cincinnati, OH, United States
Duration: Jul 8 2007Jul 11 2007

Other

Other43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference
CountryUnited States
CityCincinnati, OH
Period7/8/077/11/07

Fingerprint

flow modeling
Reynolds stress
turbulent flow
closures
strain rate
turbulence
histories
eddy viscosity
charge flow devices
history
eddy
anisotropy
physics
viscosity
tensors

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Hamlington, P. E., & Dahm, W. (2007). A new physically-based fully-realizable nonequilibrium reynolds stress closure for turbulent Flow RANS modeling. In Collection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference (Vol. 6, pp. 5548-5567)

A new physically-based fully-realizable nonequilibrium reynolds stress closure for turbulent Flow RANS modeling. / Hamlington, Peter E.; Dahm, Werner.

Collection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Vol. 6 2007. p. 5548-5567.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hamlington, PE & Dahm, W 2007, A new physically-based fully-realizable nonequilibrium reynolds stress closure for turbulent Flow RANS modeling. in Collection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference. vol. 6, pp. 5548-5567, 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Cincinnati, OH, United States, 7/8/07.
Hamlington PE, Dahm W. A new physically-based fully-realizable nonequilibrium reynolds stress closure for turbulent Flow RANS modeling. In Collection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Vol. 6. 2007. p. 5548-5567
Hamlington, Peter E. ; Dahm, Werner. / A new physically-based fully-realizable nonequilibrium reynolds stress closure for turbulent Flow RANS modeling. Collection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Vol. 6 2007. pp. 5548-5567
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