[Chris T]

Hi all,

I'm trying to run a case with with chtMultiregionFoam. I am using the following as the b.c. for my inlet velocity.

inlet
    {
        type            flowRateInletVelocity;
        value           uniform ( 0 0 0 );
        massFlowRate    1.22;
        extrapolateProfile yes;
        rho             rho;
        rhoInlet        1800;
    }

I want to try and implement a time-varying velocity to gradually ramp up the inlet velocity. This is mainly to see if it helps to avoid the divergence I experience in the first few time-steps.

I want to implement something analogous to this

{
type
uniformFixedValue;
uniformValue table ((0 0) (10 5) (999999999 5));
}

but I'm not sure how to achieve this. I tried

inlet
    {
        type            flowRateInletVelocity;
        value           uniform ( 0 0 0 );
        massFlowRate    uniformValue table ((0 0) (10 5) (999999999 5));
        extrapolateProfile yes;
        rho             rho;
        rhoInlet        1800;
    }

but I get the error
[4] --> FOAM FATAL ERROR:
[4] Cannot find file "points" in directory "cavity/polyMesh" in times "0" down to constant


I found this older post time-varying flowRateInletVelocity bc for OF5 but it is not much helpful.


Any solution to this problem or suggestions to alternatives will be appreciated.


Best,
Chris


Edit: Btw I'm using openfoam v9.