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Forum: Main CFD Forum

March 31, 2014, 13:51

Replies: 6

boundary conditions and artificial viscosity

Views: 1,360

Posted By FMDenaro

This is not clear ... when you solve laminar...

This is not clear ... when you solve laminar flow, there is no unresolvable gradient in such case, therefore the artificial dissipation does not make sense...

Forum: Main CFD Forum

March 31, 2014, 13:26

Replies: 6

boundary conditions and artificial viscosity

Views: 1,360

Posted By FMDenaro

but artificial dissipation is modulated by the...

but artificial dissipation is modulated by the local gradient intensity... do you have strong gradients as BC.s?

Forum: Main CFD Forum

March 31, 2014, 12:20

Replies: 6

boundary conditions and artificial viscosity

Views: 1,360

Posted By FMDenaro

artificial dissipation is just a trick to...

artificial dissipation is just a trick to stabilize the numerical solution across zones where strong gradients are present and can generate oscillations, so it should be added only locally

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