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Incompressible viscous stress in sonicFoam

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Old   September 8, 2007, 18:44
Default Hi all sonicFoam solver con
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Dragan Vidovic
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Hi all

sonicFoam solver contains an incompressible viscous stress term fvm::laplacian(mu, U). This form of viscous stress is based on the assumption that div U is zero, which is clearly not the case in a sonic flow. Can anyone give any justification of such viscous term, or can this be considered a bug?

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