[Carson_Ramm]

Hello,

I am defining an inlet velocity via the table method, and assuming star is capable of interpolating values as mesh density changes at the inlet. This aside, I am creating isosurface of the vorticity magnitude of the wake of my flow structure, and I can see a block, like in the image attached, that seems to be "sheets" of the table velocity values provided. I cannot for the life of me understand why these are showing up in a vorticity isosurface, especially since they should have a zero value of vorticity anyway.

Can anyone shed some light into this issue or provide any resources that could help me understand isosurfaces?

Thank you!





2023-01-23_14-57-03.jpg

[mCiFlDk]

Hi Carson,

Could you upload the table.csv you're using and indicate, in a rough way at least, the set-up of the sim? It'd be of great help to guess what's happening here.

Best.

[Carson_Ramm]

Hello! Thank you for your response!

Roughly, I am applying a piecewise defined inlet velocity gradient with constant velocity regions at the top and bottom of the domain and a linear shear somewhere in the middle. I am then implementing a virtual disk model along with some other models to observe how the wake changes relative to different inlet conditions.

In my post processing, I create an interpolated field or my scalar quantities with 300 points of vertical resolution. The inlet velocity table is created to match this resolution.

It it helps, I use a velocity inlet boundary condition for the inlet, and symmetry planes for each surrounding boundary.

I generally use my inlet velocity tables in csv form, but in order to attach it to this post I have converted it to xlsx.

In general, I am aiming to understand how isosurfaces work. I understand they isolate values of scalar fields corresponding to a given input. But what does say the "multiple(arbitrary)" option for them do versus creating multiple(range) with a fixed number of surfaces and a given range. And I am also hoping to understand where this "box" comes from in the image in the first post.

Thank you for your time and knowledge!

ShearGradTable_S_4.xlsx