Cloud Function Objects question?

jiejie · January 31, 2013, 23:45

Dear foamers

I just wonder whether anyone used the VoidFraction under the src/lagrangian/intermediate/submodels/CloudFunctionObjects?

I have a set of two phase flow data (bubble/fluid) with lagrangian tracking and I am trying to calculate the void fraction of the flow field.

I have put the followings in the kinematicCloudProperties:

Code:

cloudFunctions
{
   voidFraction;
}

However, I got the void fraction is zero everywhere in the kinematicCloudTheta:

Code:

dimensions      [0 0 0 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    movingWall
    {
        type            calculated;
        value           uniform 0;
    }
    walls
    {
        type            calculated;
        value           uniform 0;
    }
}

I am not sure where I got it every. I really appreciate any advice suggested.

haakon · May 1, 2013, 08:57

I have the exact same issue as you, and cannot get it to work either. I have filed a bug report on it: http://www.openfoam.org/mantisbt/view.php?id=829

vishal_s · April 10, 2018, 10:53

Hello,

Hello Jie, Did you solved the void fraction issue in CollidingParcel case ? can you please share their file or suggest me where and how to incorporate the line " td.cloud().functions().postMove(p, cellI, dt);" in CollidingParcel.C. Moreover, dt is not mention in the CollidingParcel.H file. so it will give an error while compiling

I am using OF-2.2.2.

January 31, 2013, 23:45	Cloud Function Objects question?	#1
jiejie Senior Member Jie Join Date: Jan 2010 Location: Australia Posts: 134 Rep Power: 16	Dear foamers I just wonder whether anyone used the VoidFraction under the src/lagrangian/intermediate/submodels/CloudFunctionObjects? I have a set of two phase flow data (bubble/fluid) with lagrangian tracking and I am trying to calculate the void fraction of the flow field. I have put the followings in the kinematicCloudProperties: Code: cloudFunctions { voidFraction; } However, I got the void fraction is zero everywhere in the kinematicCloudTheta: Code: dimensions [0 0 0 0 0 0 0]; internalField uniform 0; boundaryField { movingWall { type calculated; value uniform 0; } walls { type calculated; value uniform 0; } } I am not sure where I got it every. I really appreciate any advice suggested. Last edited by jiejie; February 1, 2013 at 03:47. Reason: update on the problem

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May 1, 2013, 08:57		#2
haakon Senior Member Join Date: Dec 2011 Posts: 111 Rep Power: 20	I have the exact same issue as you, and cannot get it to work either. I have filed a bug report on it: http://www.openfoam.org/mantisbt/view.php?id=829

April 10, 2018, 10:53		#3
vishal_s Member vishal Join Date: Mar 2013 Posts: 73 Rep Power: 13	Hello, Hello Jie, Did you solved the void fraction issue in CollidingParcel case ? can you please share their file or suggest me where and how to incorporate the line " td.cloud().functions().postMove(p, cellI, dt);" in CollidingParcel.C. Moreover, dt is not mention in the CollidingParcel.H file. so it will give an error while compiling I am using OF-2.2.2.