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Forum: Main CFD Forum

October 31, 2013, 06:21

Replies: 10

The old Hex vs Tet question

Views: 1,592

Posted By flotus1

I would not draw the same conclusion. In your...

I would not draw the same conclusion.
In your test case with the tet mesh, the numerical diffusion is only zero because the line of separation of the passive scalar has the correct direction AND the...

Forum: Main CFD Forum

October 28, 2013, 12:28

Replies: 10

The old Hex vs Tet question

Views: 1,592

Posted By flotus1

Rotating the flow direction by 90 degrees, you...

Rotating the flow direction by 90 degrees, you will get a similar diffusion error on the tet mesh.

Forum: Main CFD Forum

October 28, 2013, 09:43

Replies: 10

The old Hex vs Tet question

Views: 1,592

Posted By flotus1

Combining the two statements results in the...

Combining the two statements results in the recommendation not to use first order schemes with tet meshes.
Simply refining the mesh reduces the numerical diffusion, but only with a slope of 1.
If...

Forum: Main CFD Forum

October 28, 2013, 08:25

Replies: 10

The old Hex vs Tet question

Views: 1,592

Posted By flotus1

I just finished putting together some "best...

I just finished putting together some "best practice" guidelines on this and some related topics.

My opinion based on my personal experience with commercial CFD software is: You can achieve good...

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