[Akshay_11235]

Hello everyone,


I am trying to implement a simple codeStream implementation for inlet boundary condition.



I have a .dat file which is stored in postProcessing/volFlowRateSurface/0/surfaceFieldValue.dat which looks something like this

# Region type : sampledSurface sampleSurfaceDict
# Faces  :    2880
# Area   :    1.596839e+02
# Time            areaNormalIntegrate(U)
0.001             (1.339634e+00 0.000000e+00 0.000000e+00)
0.002             (2.785413e+00 0.000000e+00 0.000000e+00)

I want to read the value t-1 for the time instance t. I dont know how to read the .csv file in codeStream



So far I could not even build the boundary condition logic since I cannot import the value.


I assume it should follow something like this.

    INLET
    {

        type            variableHeightFlowRateInletVelocity;
        flowRate          //Set the value for flowRate using codeStream       
         #codeStream
        {
            codeInclude
        #{
            #include "fvCFD.H" 
            #include "IOstream"  //Not sure if this is the right library to include for reading a .csv file  
        #};
        codeOptions
        #{
            -I$(LIB_SRC)/finiteVolume/lnInclude \
            -I$(LIB_SRC)/meshTools/lnInclude
        #};
        codeLibs
        #{
            -lmeshTools \
            -lfiniteVolume
        #};
            
        code
        #{
            //This sets the time index, which will be used to locate the outflow value from file
            scalar t = this->db().time().value() //Introduce t scalar for indexing the .csv file later         

             //Import the csv file (say) with name "foo"

             //Set initial flow rate value
            if(t = 0)     
            {
                scalar flowRate = 0

                flowrate.write("",os)

            }
            else
            {
                //Index the .csv file 

                //Pseudo Code as below
                scalar Inflow      //construct a variable
                //Index through the .csv file 

                Inflow = foo[t-1]


                flowRate.write("",os)
            }
                

        #};        
        
        };

        alpha        alpha.water;
        value        uniform (0 0 0);
}