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On Subgrid-Scale Model Implementation for a Lee-Wave Turbulent Patch in a Stratified Flow above an Obstacle

On Subgrid-Scale Model Implementation for a Lee-Wave Turbulent Patch in a Stratified Flow above an Obstacle
On Subgrid-Scale Model Implementation for a Lee-Wave Turbulent Patch in a Stratified Flow above an Obstacle
Results of application of a subgrid-scale (SGS) model to describe turbulence arising in a stably stratified flow above an obstacle are shown for high Schmidt/Prandtl numbers. An appropriate SGS Schmidt/Prandtl number is 0.3 for the case of weakly unstable stratification in the internal wave breaking region. Use of the SGS model allows us to remove numerical noise and obtain adequate spectra, as well as fine details of secondary instabilities during the transition to turbulence.
233-236
Yakovenko, Sergey
97f1c8db-317a-4dd5-b2c9-601de12b523d
Thomas, Trevor
bccfa8da-6c8b-4eec-b593-00587d3ce3cc
Castro, Ian
66e6330d-d93a-439a-a69b-e061e660de61
Yakovenko, Sergey
97f1c8db-317a-4dd5-b2c9-601de12b523d
Thomas, Trevor
bccfa8da-6c8b-4eec-b593-00587d3ce3cc
Castro, Ian
66e6330d-d93a-439a-a69b-e061e660de61

Yakovenko, Sergey, Thomas, Trevor and Castro, Ian (2014) On Subgrid-Scale Model Implementation for a Lee-Wave Turbulent Patch in a Stratified Flow above an Obstacle. In PROGRESS IN TURBULENCE V: Springer Proceedings in Physics. vol. 149, pp. 233-236 . (doi:10.1007/978-3-319-01860-7_38).

Record type: Conference or Workshop Item (Paper)

Abstract

Results of application of a subgrid-scale (SGS) model to describe turbulence arising in a stably stratified flow above an obstacle are shown for high Schmidt/Prandtl numbers. An appropriate SGS Schmidt/Prandtl number is 0.3 for the case of weakly unstable stratification in the internal wave breaking region. Use of the SGS model allows us to remove numerical noise and obtain adequate spectra, as well as fine details of secondary instabilities during the transition to turbulence.

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More information

Published date: 2014
Organisations: Aeronautics, Astronautics & Comp. Eng, Aerodynamics & Flight Mechanics Group

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Local EPrints ID: 408817
URI: http://eprints.soton.ac.uk/id/eprint/408817
PURE UUID: cbc377db-a112-45d4-9046-69278caf13e5

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Date deposited: 28 May 2017 04:02
Last modified: 13 Mar 2019 19:53

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