Cloud Function Objects question?

jiejie · January 31, 2013, 22:45

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, 07:57

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, 09:53

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, 22:45	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 02:47. Reason: update on the problem

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Question about twoSymm Function	titio	OpenFOAM Running, Solving & CFD	6	April 28, 2020 03:28
question about cfx wall function	piyo	CFX	1	November 21, 2012 17:17
Field Function Question. Need help writing it :(((	kj878	Siemens	1	February 14, 2012 18:30
Question about Initialization of Signed Distance Function (LEVEL SET)	jl21_87	Main CFD Forum	0	January 10, 2012 21:50
Custom Field Function Question	Jason	FLUENT	0	August 4, 2004 10:23

May 1, 2013, 07:57		#2
haakon Senior Member Join Date: Dec 2011 Posts: 111 Rep Power: 19	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, 09:53		#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.