Error in initializing a non uniform velocity field
 

Hi everyone,

I am trying to simulate 2d mixing layer problem in OF for which I have to initialize the velocity field with a known expression. I am trying to do it using SWAK4 FOAM. My U file and FSFdict file are given below. Here I have changed the expression, but Ux and Uy are simply fcn(X,Y) . When I ran funkySetFields -time 0, I got error message which is also given below.

Senior members, plz help me !!

__________________________________________________ __________________
funkySetFieldsDict
FoamFile
{
version 2.0;
format ascii;

root "/home/vikas/Desktop/2d_mix1";
case "VJTC";
instance "";
local "";

class dictionary;
object funkySetFieldsDict;
}

expressions
(
SetVelocityField
{
field U;

variables (
"Ux= pos().x*
"Uy=pos().y"

);

expression "vector(Ux Uy 0)";

condition "mag(pos().y)<1";
}
);
__________________________________________________ _____________________
0/U
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
top
{
type slip;

}

bottom
{
type slip;

}

left
{
type cyclic;

}
right
{
type cyclic;

}
frontAndBack
{
type empty;
}
}



// ************************************************** *********************** //__________________________________________________ ______________________
Error message
--> FOAM FATAL ERROR:
Parser Error for driver FieldValueExpressionDriver at "1.11-12" :"syntax error, unexpected scalarID"
"vector(Ux Uy 0)"

Context of the error:


- Driver constructed from scratch
Evaluating expression "vector(Ux Uy 0)"


From function parsingValue
in file lnInclude/CommonValueExpressionDriverI.H at line 1189.

FOAM exiting

__________________________________________________ ___________________

Thank You

Sorry friends... I have found my mistake (trivial one actually ). The 0/U file has internal field as uniform. I supplied a non uniform field and then fsf overwrote it as I wanted.

Hi Vikas

Interesting post. I am having a similar problem with funky set fields. Can you elaborate how you finally corrected the error.

Thank you.