[gu1]

Hi,

I'm using OpenFOAM version 5.0 and would like to know, how I define a fixed pressure gradient for a periodic domain? Unfortunately fvOption - meanVelocityForce is not interesting as it varies the gradient over the simulation.

[pete20r2]

You could try jumpCyclic at the patches. It doesn't apply to the field like you asked but hopefully problem will allow the pressure gradient to develop.

[Santiago]

Originally Posted by gu1

Hi,

I'm using OpenFOAM version 5.0 and would like to know, how I define a fixed pressure gradient for a periodic domain? Unfortunately fvOption - meanVelocityForce is not interesting as it varies the gradient over the simulation.

Just add a bodyforce to the momentum predictor of piso, like fvOptions

[gu1]

Originally Posted by Santiago

Just add a bodyforce to the momentum predictor of piso, like fvOptions

Thanks for your response.

Unfortunately I am a beginner in programming (C++). Could you help me with that?

Yesterday I tried this issue:

fvVectorMatrix UEqn
(
fvm::ddt(U)
+ fvm::div(phi, U)
+ MRF.DDt(U)
+ turbulence->divDevReff(U)
==
fvOptions(U) + beta
);

...but in my head it did not make much sense.