[breznak]

Hello,

I have a given velocity profile in csv file. The file looks like this:

X, Y, Z, Ux, Uy, Uz ,
-1.95E-02,-1.70E-02,4.08E-01,0.00E+00,0.00E+00,0.00E+00,
-1.94E-02,-1.70E-02,4.08E-01,0.00E+00,0.00E+00,0.00E+00,
-1.94E-02,-1.69E-02,4.08E-01,-1.76E-03,-1.57E-03,4.35E-01,
-1.95E-02,-1.69E-02,4.08E-01,0.00E+00,0.00E+00,0.00E+00,
-1.94E-02,-1.68E-02,4.08E-01,-2.13E-03,-6.79E-04,5.45E-01,
...
and so on

It means there are Ux Uy Uz values for every each coordinates.

And my ../0/U looks like this:

inlet
{
    type         uniformFixedValue;
    uniformValue
    {
        type             tableFile;
        format           csv;
        nHeaderLine      4;              // number of header lines
        refColumn        0;              // time column index
        componentColumns (1);            // data column index
        separator        ",";            // optional (defaults to ",")
        mergeSeparators  no;             // merge multiple separators
        file             "U_inlet.csv";
   }
   
}

How should I rewrite csv file? My simulation is steady so I am using simpleFoam so there cannot be time values...

[Vinzmann]

Why do you use a csv for your velocity BC if your simulation is steady state?
You should consider using a transient solver or just use the last value for U for your simulation.