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-   -   How to Increase the ITERATIONS (http://www.cfd-online.com/Forums/openfoam-pre-processing/62028-how-increase-iterations.html)

sivakumar October 21, 2008 05:47

hi friend, I am usi
 
hi friend,
I am using version1.5, my calculation always its saying maximum number of iteration reached after then its not calculating.
so i want to increase the number of ITERATION
how can i increase the iteration?????
can you help me to do that.

have a nice day
siva

tian October 21, 2008 06:05

Hi Siva, it seems that your
 
Hi Siva,

it seems that your boundary conditions are set up not correct.

Bye
Thomas

sivakumar October 21, 2008 06:50

hi Thomas, I have a
 
hi Thomas,
I have attached my BC here please have a look and tell me what is wrong in that

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.5 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

// FoamX Mesh Description File

FoamFile
{
version 2.0;
format ascii;
class polyBoundaryMesh;
object boundary;
}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //


(
INLE1
{
type patch;
physicalType inlet;
startFace 6030423;
nFaces 1711;
}

INLE2
{
type patch;
physicalType inlet;
startFace 6032134;
nFaces 1496;
}

INLE3
{
type patch;
physicalType inlet;
startFace 6033630;
nFaces 1834;
}

INLE4
{
type patch;
physicalType inlet;
startFace 6035464;
nFaces 1731;
}

OUTL5
{
type patch;
physicalType outlet;
startFace 6037195;
nFaces 1214;
}

OUTL6
{
type patch;
physicalType outlet;
startFace 6038409;
nFaces 1214;
}

SYMP7
{
type symmetryPlane;
physicalType symmetryPlane;
startFace 6039623;
nFaces 3615;
}

SYMP8
{
type symmetryPlane;
physicalType symmetryPlane;
startFace 6043238;
nFaces 3868;
}

WALL9
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6047106;
nFaces 1204;
}

WALL10
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6048310;
nFaces 36525;
}

WALL11
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6084835;
nFaces 13890;
}

WALL12
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6098725;
nFaces 9335;
}

WALL13
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6108060;
nFaces 47426;
}

WALL14
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6155486;
nFaces 169;
}

WALL15
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6155655;
nFaces 167;
}

WALL16
{
type wall;
physicalType fixedTemperatureWallFunctions;
startFace 6155822;
nFaces 1376;
}

defaultFaces
{
type wall;
physicalType adiabaticWallFunctions;
startFace 6157198;
nFaces 151051;
}

)

// ************************************************** *********************** //


bye
siva

tian October 21, 2008 06:54

Hi Siva, I also got this er
 
Hi Siva,

I also got this error sometimes. Than I had to change my pressure bc at time 0. Have a look in the time folder 0.

Bye
Thomas

sivakumar October 21, 2008 08:32

Hi Thomas, here i h
 
Hi Thomas,
here i have give my P file, please have a look and tell me what i have to change.
what u have changed? please dont mistake me.

// Field Dictionary

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p;
}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //


dimensions [1 -1 -2 0 0 0 0];

internalField uniform 100000;

boundaryField
{
INLE1
{
type zeroGradient;
}

INLE2
{
type zeroGradient;
}

INLE3
{
type zeroGradient;
}

INLE4
{
type zeroGradient;
}

OUTL5
{
type fixedValue;
value uniform 100000;
}

OUTL6
{
type fixedValue;
value uniform 100000;
}

SYMP7
{
type symmetryPlane;
}

SYMP8
{
type symmetryPlane;
}

WALL9
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL10
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL11
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL12
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL13
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL14
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL15
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

WALL16
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}

defaultFaces
{
type fixedFluxBuoyantPressure;
value uniform 100000;
}
}


// ************************************************** *********************** //
bye
siva

tian October 21, 2008 09:04

Hi Siva, can you give me yo
 
Hi Siva,

can you give me your email adresse? Maybe I can have a look to your case?

Thanks
Bye
Thomas

sivakumar October 21, 2008 09:32

Hi Thomas, ya sure
 
Hi Thomas,
ya sure here is my email id
sivamscomput@gmail.com.

bye,
siva

tian October 21, 2008 15:42

Hi Siva, if you sure you no
 
Hi Siva,

if you sure you not make some misstake you can increase the iteration if I am not wrong with:

relTol 0.05;
minIter 1;
maxIter 1000;

Bye
Thomas


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