How to manipulat a volScalarField like this...

masspec · June 22, 2010, 17:38

Hey there,

I　get a volScalarField　Ａ，and another volScalarField B. And B is dependent on A as follows:

if the value of a particular element in A is larger than a threshold,
then the corresponding value of that element in B is a function of A as f1.

else the value of B is a function of A as f2.

I do not know how can I　manipulate the volScalarField to attain such objective, and looking for some help......

Thanks a lot.

tiddlycorona · June 22, 2010, 20:29

I　think what you need is just how to have access to the field value at a cell, judge it and accordingly made modification to another field.

forAll (A, celli) {

if (A[celli]) > Threshold)
B[celli] = f1(A[celli]);
else
B[celli] = f2(A[celli]);

}

Not sure if it is right. Hope more experienced Foamers can tell us how to do it.

June 22, 2010, 17:38	How to manipulat a volScalarField like this...	#1
masspec New Member Xingzhi You Join Date: May 2010 Posts: 7 Rep Power: 15	Hey there, I　get a volScalarField　Ａ，and another volScalarField B. And B is dependent on A as follows: if the value of a particular element in A is larger than a threshold, then the corresponding value of that element in B is a function of A as f1. else the value of B is a function of A as f2. I do not know how can I　manipulate the volScalarField to attain such objective, and looking for some help...... Thanks a lot.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to create initiate a volScalarField p without reading from disk NO_READ does not seem to work	dbxmcf	OpenFOAM Running, Solving & CFD	14	March 25, 2022 06:08
if-loop, volScalarField comparison	volker	OpenFOAM	7	March 6, 2020 20:03
Problems with creating a volScalarField	georlade	OpenFOAM Programming & Development	4	December 4, 2016 12:31
Definition of a linear function as volScalarField	titio	OpenFOAM Running, Solving & CFD	1	October 3, 2010 16:51
dimensioned volScalarField	lions85	OpenFOAM	1	November 12, 2009 02:41

June 22, 2010, 20:29		#2
tiddlycorona New Member Hans Join Date: Jun 2010 Posts: 2 Rep Power: 0	I　think what you need is just how to have access to the field value at a cell, judge it and accordingly made modification to another field. forAll (A, celli) { if (A[celli]) > Threshold) B[celli] = f1(A[celli]); else B[celli] = f2(A[celli]); } Not sure if it is right. Hope more experienced Foamers can tell us how to do it.