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- aggregation classification "P1".
- aggregation creator B90965.
- aggregation creator B90966.
- aggregation creator person.
- aggregation creator person.
- aggregation date "2011".
- aggregation format "application/pdf".
- aggregation hasFormat 1947951.bibtex.
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- aggregation isPartOf urn:isbn:9783642178832.
- aggregation language "eng".
- aggregation publisher "Springer".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Technology and Engineering".
- aggregation title "On the role of numerical dissipation in unsteady low Mach number flow computations".
- aggregation abstract "Numerical dissipation is necessary in low Mach number flow computations on co-located grids to avoid checkerboard decoupling, which corresponds to non-physical pressure oscillations. A commonly used technique to cancel out checkerboard decoupling consists in introducing a relation between the mass flux and the pressure difference on cell faces, which involves a dissipation coefficient scaling as 1/M(2), where M denotes a representative Mach number in the flow. We demonstrate that a typical algorithm with such an explicit pressure-velocity coupling results in unphysical build-up of kinetic energy as a consequence of excited unsteadiness at boundaries. This happens despite the correct Mach number scaling of the dissipation coefficient and despite the correct steady flow behaviour. We further demonstrate that the stabilisation of the checkerboard decoupling by the Rhie-Chow interpolation does not have this deficiency. We give an explanation for the erroneous behaviour and for the correct behaviour of the coupling methods.".
- aggregation authorList BK234548.
- aggregation endPage "878".
- aggregation startPage "873".
- aggregation aggregates 1947959.
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- aggregation similarTo 978-3-642-17884-9_113.
- aggregation similarTo LU-1947951.