how to fix reverse flow in fluent

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  • Last Post 14 May 2019
Josch posted this 11 May 2019

Hallo,

can anyone tell me how to fix reverse flow at pressure inlet and pressure outlet?

My Mesh is consists of tetrahedral elements and the skweness is good. 

I use two pressure Inlets and one pressure outlet.

I want to simulate the negativ pressure in a jet pump.

 

Thanks in advance

 

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rwoolhou posted this 14 May 2019

Pressure boundaries mean that the mass flow (and potentially) density are part of the solution rather than the set up. This means it's very sensitive to the initial conditions. 

If you can start the model off with velocity inlets and then alter to pressure bounds once it's running. 

Reverse flow can also be because the domain isn't big enough.

 

I'll also move to Fluids as it's unlikely to be a meshing problem. 

abenhadj posted this 14 May 2019

To add wrong ini pressure field and other more things. Add more details about Geo Mesh and models.

Best regards,

Amine

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