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Unsteady turbulent flow with sudden pressure gradient changes
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UNSPECIFIED (2005) Unsteady turbulent flow with sudden pressure gradient changes. In: 8th ICFD Conference on Numerical Methods for Fluid Dynamics, Oxford Univ Comp Lab, Oxford, ENGLAND, 2004. Published in: INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 47 (8-9). pp. 925-930. doi:10.1002/fld.917 ISSN 0271-2091.
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Official URL: http://dx.doi.org/10.1002/fld.917
Abstract
Direct numerical simulations are performed for a turbulent flow subjected to a sudden change in pressure gradient. The calculations are started from a fully developed turbulent channel flow at Re-tau = 180. The pressure gradient of the channel flow is then changed abruptly. The responses of the turbulence quantities (e.g. turbulence intensities, Reynolds shear stress, and vorticity fluctuations) and the near-wall turbulence structure to the pressure gradient change are investigated. It is found that there are two different relaxations: a fast relaxation at the early stage and a slow one at the later stage. The early response of the velocity fluctuations shows an anisotropic response to the near-wall turbulence. Copyright (c) 2005 John Wiley D Sons, Ltd.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software Q Science > QA Mathematics T Technology > TJ Mechanical engineering and machinery Q Science > QC Physics |
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Journal or Publication Title: | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS | ||||
Publisher: | JOHN WILEY & SONS LTD | ||||
ISSN: | 0271-2091 | ||||
Official Date: | 20 March 2005 | ||||
Dates: |
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Volume: | 47 | ||||
Number: | 8-9 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 925-930 | ||||
DOI: | 10.1002/fld.917 | ||||
Publication Status: | Published | ||||
Title of Event: | 8th ICFD Conference on Numerical Methods for Fluid Dynamics | ||||
Location of Event: | Oxford Univ Comp Lab, Oxford, ENGLAND | ||||
Date(s) of Event: | 2004 |
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