DNS and LES predictions of intermittency in a turbulent round jet
DNS and LES predictions of intermittency in a turbulent round jet
Direct numerical and large eddy simulation have been applied to study the intermittency in a turbulent round jet with a Reynolds number of 2400. Comparisons between time-averaged results for the velocity and scalar fields demonstrate reasonable agreement with the data and predictions of other authors, and between the present LES and DNS, although notable differences do occur in the latter. Derived probability density functions are also in reasonable agreement, although the DNS results demonstrate the more rapid influence of intermittency with radial distance in the jet. This is reflected in derived intermittency profiles, with LES generally giving profiles that are broader than equivalent DNS results. Despite these differences, the transition from turbulent to non-turbulent flow is always predicted to be more rapid for the scalar than for velocity with, in general, this transition occurring closer to the centre-line for the scalar than for the velocity.
Gilliland, T
91014606-aee5-4561-92d9-a5ad680f766b
Ranga Dinesh, K.K.J.
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Fairweather, M
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Falle, S.A.E.G
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Jenkins, K.W
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Savill, A.M
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September 2009
Gilliland, T
91014606-aee5-4561-92d9-a5ad680f766b
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Fairweather, M
010113e3-10ae-4fd4-85aa-66e24ba6f489
Falle, S.A.E.G
f8dadf4f-e306-40aa-83c9-d2bce614c59e
Jenkins, K.W
eec6783a-46fd-4386-9346-52bd81875ce2
Savill, A.M
ba0011fa-8c93-439e-925d-4facdd97b0e3
Gilliland, T, Ranga Dinesh, K.K.J., Fairweather, M, Falle, S.A.E.G, Jenkins, K.W and Savill, A.M
(2009)
DNS and LES predictions of intermittency in a turbulent round jet.
6th International Conference on Turbulence Heat and Mass Transfer (THMT06), Rome, Italy.
14 - 18 Sep 2009.
(doi:10.1615/ICHMT.2009.TurbulHeatMassTransf.330).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Direct numerical and large eddy simulation have been applied to study the intermittency in a turbulent round jet with a Reynolds number of 2400. Comparisons between time-averaged results for the velocity and scalar fields demonstrate reasonable agreement with the data and predictions of other authors, and between the present LES and DNS, although notable differences do occur in the latter. Derived probability density functions are also in reasonable agreement, although the DNS results demonstrate the more rapid influence of intermittency with radial distance in the jet. This is reflected in derived intermittency profiles, with LES generally giving profiles that are broader than equivalent DNS results. Despite these differences, the transition from turbulent to non-turbulent flow is always predicted to be more rapid for the scalar than for velocity with, in general, this transition occurring closer to the centre-line for the scalar than for the velocity.
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Published date: September 2009
Venue - Dates:
6th International Conference on Turbulence Heat and Mass Transfer (THMT06), Rome, Italy, 2009-09-14 - 2009-09-18
Organisations:
Engineering Science Unit
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Local EPrints ID: 347908
URI: http://eprints.soton.ac.uk/id/eprint/347908
PURE UUID: cd5bee92-131f-4a90-a7d7-297535d727b1
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Date deposited: 12 Feb 2013 14:14
Last modified: 15 Mar 2024 03:46
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Contributors
Author:
T Gilliland
Author:
M Fairweather
Author:
S.A.E.G Falle
Author:
K.W Jenkins
Author:
A.M Savill
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