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Forum: Main CFD Forum

May 24, 2023, 07:25

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By LuckyTran

Please clarify your entire boundary conditions...

Please clarify your entire boundary conditions for both pressure and velocity. It works means you get a solution that looks like what? It looks like fully developed and looks exactly like the DNS...

Forum: Main CFD Forum

May 23, 2023, 13:06

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By LuckyTran

Note that you can definitely run a case with a...

Note that you can definitely run a case with a specified pressure at the inlet and outlet. Your question was specifically about how the source term works.

Consider a pressure field such that...

Forum: Main CFD Forum

May 23, 2023, 07:09

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By LuckyTran

The forcing term allows you to use periodic BCs...

The forcing term allows you to use periodic BCs on the remaining resulting pressure field. That's why you're doing it.

Forum: Main CFD Forum

May 22, 2023, 03:07

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By LuckyTran

You have a plane channel, i.e. 2D, so you repeat...

You have a plane channel, i.e. 2D, so you repeat the flow in spanwise direction.

You have a fully developed flow in the streamwise direction and that's why you use the periodic there. If this was...

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