A multigrid accelerated hybrid unstructured mesh method for 3D compressible turbulent flow |
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Authors: | K A Sørensen O Hassan K Morgan N P Weatherill |
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Affiliation: | (1) Aerodynamics-MT632, EADS, Military Aircraft, 81663 München, Germany, DE;(2) Civil & Computational Engineering Centre, University of Wales, Swansea SA2 8PP, Wales, UK, GB |
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Abstract: | A cell vertex finite volume method for the solution of steady compressible turbulent flow problems on unstructured hybrid
meshes of tetrahedra, prisms, pyramids and hexahedra is described. These hybrid meshes are constructed by firstly discretising
the computational domain using tetrahedral elements and then by merging certain tetrahedra. A one equation turbulence model
is employed and the solution of the steady flow equations is obtained by explicit relaxation. The solution process is accelerated
by the addition of a multigrid method, in which the coarse meshes are generated by agglomeration, and by parallelisation.
The approach is shown to be effective for the simulation of a number of 3D flows of current practical interest.
Sponsored by The Research Council of Norway, project number 125676/410
Dedicated to the memory of Prof. Mike Crisfield, a respected colleague |
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Keywords: | Steady 3D aerodynamic flows Finite volume method Hybrid unstructured mesh One equation turbulence model Agglomerated multigrid Parallelisation |
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