[cfdnewb123]

Using RANS model for backstep and all is good except the anisotropic component of the shear stress where there is a lot of oscillation at the region of flow separation. I can't remove them even at high mesh density. Any recommendation to remove them?

[aero_head]

Hello,

I am not sure if mesh density is the issue here.

To reduce spurious oscillations, damping factors can be implemented mainly in implicit time integration schemes. The bulk viscosity method (BVM) is an explicit scheme for damping spurious oscillation, used in commercial types of software such as LS-DYNA and ABAQUS.

Here is a link to a paper (it's open access) with more information: https://www.sciencedirect.com/scienc...98122115003089

[cfdnewb123]

Originally Posted by aero_head

Hello,

I am not sure if mesh density is the issue here.

To reduce spurious oscillations, damping factors can be implemented mainly in implicit time integration schemes. The bulk viscosity method (BVM) is an explicit scheme for damping spurious oscillation, used in commercial types of software such as LS-DYNA and ABAQUS.

Here is a link to a paper (it's open access) with more information: https://www.sciencedirect.com/scienc...98122115003089

How do I implement those on Fluent? I can't find those method you mentioned