Two-equation turbulence modelling of a transitional separation bubble
Two-equation turbulence modelling of a transitional separation bubble
Calculations of the Reynolds averaged equations using two different turbulence models have been compared with direct numerical simulation of a transitional separation bubble. Three methods of transition modelling were investigated. The first had no transition adjustment, the second involved fixing the transition point at the location observed in the simulation and the third was a direct transformation of a method proposed by Wilcox [1] which involved sensitising the eddy viscosity and transport equations to the local turbulent Reynolds number. The models captured the general features of the flow but were unable to show the recovery behaviour of the flow behind the bubble. Reasons for the failure are discussed using a priori analysis of terms in the model equations.
transition, turbulence modelling, separation
175-91
Howard, R.J.A.
00df2480-b821-4d0a-8f20-c485ea816f6d
Alam, M.
42ac5adc-8234-482f-bf7c-e226a1769fbd
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
2000
Howard, R.J.A.
00df2480-b821-4d0a-8f20-c485ea816f6d
Alam, M.
42ac5adc-8234-482f-bf7c-e226a1769fbd
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
Howard, R.J.A., Alam, M. and Sandham, N.D.
(2000)
Two-equation turbulence modelling of a transitional separation bubble.
Flow Turbulence and Combustion, 63 (1-4), .
(doi:10.1023/A:1009992406036).
Abstract
Calculations of the Reynolds averaged equations using two different turbulence models have been compared with direct numerical simulation of a transitional separation bubble. Three methods of transition modelling were investigated. The first had no transition adjustment, the second involved fixing the transition point at the location observed in the simulation and the third was a direct transformation of a method proposed by Wilcox [1] which involved sensitising the eddy viscosity and transport equations to the local turbulent Reynolds number. The models captured the general features of the flow but were unable to show the recovery behaviour of the flow behind the bubble. Reasons for the failure are discussed using a priori analysis of terms in the model equations.
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Published date: 2000
Keywords:
transition, turbulence modelling, separation
Organisations:
Engineering Sciences
Identifiers
Local EPrints ID: 21331
URI: http://eprints.soton.ac.uk/id/eprint/21331
ISSN: 1386-6184
PURE UUID: 037539b0-e418-4bb8-b83e-2ec0bf8a1dc3
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Date deposited: 14 Mar 2006
Last modified: 16 Mar 2024 03:03
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Contributors
Author:
R.J.A. Howard
Author:
M. Alam
Author:
N.D. Sandham
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