Objetivo
This Focused Fundamental Research project addresses the development of "Numerical Turbulence Models" through well coordinated efforts on both the physical modelling and numerical methods in order to significantly improve predictions in aeronautical applications. Research groups in this area with extensive and notable achievements in computations, and physical modelling and state-of-the-art experimental facilities will work together toward this common goal.
The objectives of the project are:
- To develop and extend second-order turbulence closure models for incompressible flows.
- To develop and extend numerical models for simulating compressible shear, boundary, and shock layer interactions in both steady and unsteady flows.
Analytical Studies
- To improve and extend the e-equation in the k-e model so as to account for mean flow vorticity, anisotropy, multiple-wall proximity, and low Reynolds number effects.
- To further refine a new length-scale equation based on two-point correlations.
- To re-examine and start the development of new models for the pressure-strain and turbulent transport terms in the Reynolds-stress equations based on two-point correlations.
- To perform numerical studies that make direct use of the analytical developments.
The developments of the second and third items are based on two-point correlation techniques. This approach to turbulence modelling is physically sound and mathematically rigorous.
Experimental Studies
State-of-the-art experimental techniques (PIV, optical skin friction sensors using fibre optics, flow-visualization coupled with image processing, multiple hot-wire probes, and LDA) will be used in the following studies:
- Two-point correlations of the Reynolds-stress tensor in channel and round free jet flows.
- Three-dimensional boundary layers.
- Internal and external separated flows.
Numerical Studies
These studies will focus on numerical methods and turbulence models for compressible flows, especially on predicting the interactions between shear layers, boundary layers, and shocks. The main objective is to produce the following enhancements on existing predictive methods:
- Modelling improvements (introduce new terms to account for unsteady flow features, pressure gradient, and anisotropy).
- Accuracy of approximations (improve near-wall special treatments, non-structured meshes).
- Efficiency of solution algorithms (implicit algorithms, multigrid).
Concerning the cooperation in this "concerted action", the keywords are: "a common CFD library" and "an electronic network". In more detail, the cooperation will rely on a database consisting of a CFD software FORTRAN library with the associated documentation and the numerical (meshes, solutions) and experimental data that will be available by electronic network to a progressively larger number of academic institutions (for research or training purposes) and industry.
Ámbito científico
- natural sciencescomputer and information sciencessoftware
- natural sciencescomputer and information sciencesdatabases
- natural sciencesphysical sciencesclassical mechanicsfluid mechanicsfluid dynamics
- natural sciencesphysical sciencesopticsfibre optics
- natural sciencesmathematicsapplied mathematicsnumerical analysis
Tema(s)
Data not availableConvocatoria de propuestas
Data not availableRégimen de financiación
CSC - Cost-sharing contractsCoordinador
06902 SOPHIA ANTIPOLIS
Francia
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Participantes (19)
92295 CHATENAY MALABRY
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2600 GB DELFT
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2800 Lyngby
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69131 Ecully
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161 11 BROMMA
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31400 TOULOUSE
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1049-001 LISBOA
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100 44 Stockholm
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15710 ATHENS
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15773 ATHENS
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91058 ERLANGEN
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41004 Sevilla
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26500 Patras
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10129 Torino
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13003 Marseille
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76821 Mont-Saint-Aignan
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1050 BRUSSEL
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