| EPSRC Reference: |
GR/M31187/01 |
| Title: |
ANALYSIS AND MODELLING OF NEAR-WALL TURBULENCE FOR HIGH-REYNOLDS-NUMBER LARGE-EDDY SIMULATIONS |
| Principal Investigator: |
Morrison, Professor J |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Aeronautics |
| Organisation: |
Imperial College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
15 March 1999 |
Ends: |
14 May 2002 |
Value (£): |
161,768
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| EPSRC Research Topic Classifications: |
| Aerodynamics |
Numerical Analysis |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Data from the direct numerical simulation of turbulent channel flow are to be analysed by both conditional sampling and discrete wavelet transforms in order to assess the scale dependence of the spectral flux of turbulence kinetic energy. The results are then to be used to construct a wavelet-based model of the subgrid stresses required for large eddy simulation (LES) of turbulent, wall-bounded flow. The essence of the approach comes from previous work which suggests that spectral flux is localised in both Fourier and real space, and therefore best represented by a wavelet formalism. Such an approach would avoid the use of a conventional eddy-viscosity which is absolutely dissipative, and therefore unable to represent physical effects such as backscatter , the transfer of energy to lower wave number, in the direction opposite to that of the mean transfer. The complementary requirement in LES for accurate, time-dependent surface boundary conditions will also be addressed by the use of other established techniques to identify 'universal' contributions to the wall shear stress, thereby establishing correlations between it and turbulence structure. Improved surface boundary conditions would reduce the meshing requirement for the near-wall region, thereby offering the opportunity of accurate simulations at high Reynolds numbers.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.imperial.ac.uk |