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Forum: Main CFD Forum

May 24, 2023, 07:31

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By FMDenaro

And there is a physical difference between...

And there is a physical difference between inlet/outlet conditions and periodicity. The former simulates a spatial evolving BL, the latter the temporal evolving BL.

I suppose a steady Poiseuille...

Forum: Main CFD Forum

May 23, 2023, 10:42

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By FMDenaro

To understand the question, you should consider...

To understand the question, you should consider the non-dimensional form of the momentum equation using the u_tau velocity as reference. The pressure gradient requires a splitting to highlight the...

Forum: Main CFD Forum

May 19, 2023, 13:07

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By FMDenaro

No, you have a constant pressure gradient term in...

No, you have a constant pressure gradient term in the momentum equation plus a periodic fluctuation field you solve by means of the pressure equation with periodic BCs.

Forum: Main CFD Forum

May 19, 2023, 08:15

Replies: 22

Boundary Conditions of Turbulent Channel Flow (DNS)

Views: 950

Posted By FMDenaro

It means you have periodic BCs in streamwise and...

It means you have periodic BCs in streamwise and spanwise directions.

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