Wrong Pressure Distribution

shravana · September 20, 2021, 19:44

Hi all! I have conducted an ICFD analysis of a 3 mm cooling channel using a Steady-State Solver. The image below is the fluid pressure result for boundary conditions: Inlet velocity = 1195.586 mm/s and Outlet pressure = 0 MPa.
As seen here, the pressure results are not consistent especially in the region near the inlet and the outlet. Can anyone help me recognize what could the reason be for this?

Guvennergiz · September 21, 2021, 08:37

Do you map the pressure values to Ls-Dyna mesh?

shravana · September 21, 2021, 08:39

No, I did not map any pressure values. This result is based on the boundary conditions only.

Guvennergiz · September 21, 2021, 08:48

Because it looks LS-Dyna Pre-Post, maybe this is the problem. Otherwise I think its about the mesh...

shravana · September 21, 2021, 08:53

Yes, it is LS-Dyna but I did not map any pressure values. I have refined the mesh to 0.25 mm element size.

I have investigated a simple cylinder too and it gives me correct results.

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September 21, 2021, 08:37		#2
Guvennergiz Member Guven Nergiz Join Date: Jul 2020 Location: Turkey Posts: 52 Rep Power: 7	Do you map the pressure values to Ls-Dyna mesh?

September 21, 2021, 08:39		#3
shravana New Member Shravana Join Date: Sep 2021 Posts: 3 Rep Power: 6	No, I did not map any pressure values. This result is based on the boundary conditions only.

September 21, 2021, 08:48		#4
Guvennergiz Member Guven Nergiz Join Date: Jul 2020 Location: Turkey Posts: 52 Rep Power: 7	Because it looks LS-Dyna Pre-Post, maybe this is the problem. Otherwise I think its about the mesh...

September 21, 2021, 08:53		#5
shravana New Member Shravana Join Date: Sep 2021 Posts: 3 Rep Power: 6	Yes, it is LS-Dyna but I did not map any pressure values. I have refined the mesh to 0.25 mm element size. I have investigated a simple cylinder too and it gives me correct results.