time-varying porosity values with porosity explicitPorositySource

Thangam · March 2, 2023, 10:38

I want to specify the value of blockage/porosity that changes over time. A simple example would something that has no blockage at the beginning but progressively has more blockage. Reading a tableFile or just scalar values i.e (time, D) within fvOptions/fvModels is what I'm looking for. How do I go about it?

From the tutorials: incompressible/pisoFoam/laminar/porousBlockage/constant/fvModels

Code:

porosity
{
    type            explicitPorositySource;

    explicitPorositySourceCoeffs
    {
        selectionMode   cellZone;
        cellZone        porousBlockage;
        
        type            DarcyForchheimer;
        
        D 100;  // This value needs to be non-uniform/time-varying.
    
        d   ($D $D $D);
  
         f   (0 0 0);
        
        coordinateSystem porousBlockage;
    }
}

jennyjjl · March 4, 2025, 23:21

Hi Thangam,

are you able to solve this problem? I have the same case to consider. Thanks!

March 2, 2023, 10:38	time-varying porosity values with porosity explicitPorositySource	#1
Thangam Member Thangam Natarajan Join Date: Dec 2010 Location: Perth Posts: 70 Rep Power: 17	I want to specify the value of blockage/porosity that changes over time. A simple example would something that has no blockage at the beginning but progressively has more blockage. Reading a tableFile or just scalar values i.e (time, D) within fvOptions/fvModels is what I'm looking for. How do I go about it? From the tutorials: incompressible/pisoFoam/laminar/porousBlockage/constant/fvModels Code: porosity { type explicitPorositySource; explicitPorositySourceCoeffs { selectionMode cellZone; cellZone porousBlockage; type DarcyForchheimer; D 100; // This value needs to be non-uniform/time-varying. d ($D $D $D); f (0 0 0); coordinateSystem porousBlockage; } }

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March 4, 2025, 23:21		#2
jennyjjl New Member jenny Join Date: Feb 2025 Posts: 4 Rep Power: 2	Hi Thangam, are you able to solve this problem? I have the same case to consider. Thanks!