[limpideyes]

Hello,

I would like to set up a custom wind profile at the inlet boundary condition. I've found the type, fixedProfile for OpenFOAM v9:

https://cpp.openfoam.org/v9/classFoa...d.html#details

inlet
{
        type            fixedProfile;
        profile         table;
        profileCoeffs
        {
            file                "UProfile";
            format              csv;
            nHeaderLine         0;
            refColumn           0;
            componentColumns    (1 2 3);
            separator           ",";
            mergeSeparators     no;
            outOfBounds         clamp;
            interpolationScheme linear;
        }
        direction        (0 1 0);
        origin           0;
}

What I want is to keep the custom inlet wind profile until the outlet.

My question is:
Once I set up with the fixedProfile at the inlet, does this profile maintain until reaching outlet?

Please advise,

Thanks in advance!

[alexvaleije]

Hi,

Without any further research, I would say no. The profile will develop according to the rest of the boundary conditions you set in the case. If you want to keep it you would have to set your BCs accordingly, using symmetry conditions or fixed values to help it during the calculation

Hope it helps. Regards

[limpideyes]

Thanks for your note, alexvaleije !

What is the symmetry conditions? And, does the fixed vaules mean a codedFixedValue?

[alexvaleije]

In short, symmetry boundary conditions are used in CFD to represent boundaries where the normal gradient of the variable to the surface is 0, and are commonly used for the side walls and sky in external flow simulations, since you want these boundaries to be far from your domain of study to not interact with it (and from for wind condition, it seems that you are running something similar to that)

In openfoam is represented (at least for older versions) with the term "symmetry".

As for your question regarding codedFixedValue, I did some some small research, and it seems to be a more developed condition than "fixedValue". The one that I am talking is this:

inlet
{
type fixedValue;
value uniform (1 0 0);
}

where you define a scalar value in the three directions. I imagine that the BC that you are using works similar to this

Regards,