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A linear solver based on algebraic multigrid and defect correction for the solution of adjoint RANS equations

: Förster, M.; Pal, A.


International journal for numerical methods in fluids 74 (2014), Nr.11, S.846-855
ISSN: 0308-1400
ISSN: 0271-2091
Fraunhofer SCAI ()

A new solution approach for discrete adjoint Reynolds-averaged Navier-Stokes equations is suggested. The approach is based on a combination of algebraic multigrid and defect correction. The efficient interplay of these two methods results in a fast and robust solution technique. Algebraic multigrid deals very well with unstructured grids, and defect correction completes it in such a way that a required second-order accuracy of the solution is achieved. The performance of the suggested solution approach is demonstrated on a number of representative benchmarks.