CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Maximum number of iterations exceeded when calculating T with AMI baffles only

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 26, 2017, 09:41
Default Maximum number of iterations exceeded when calculating T with AMI baffles only
  #1
Member
 
Bruno Lebon
Join Date: Dec 2012
Posts: 33
Rep Power: 14
blebon is on a distinguished road
I get the following error when running adaptive meshing with heat transfer only when creating baffles:

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 4.1
Exec   : buoyantPimpleRelativeDyMFoam
Date   : Aug 26 2017
Time   : 13:08:54
Host   : 
PID    : 71504
Case   : run/direct_chill_AMI_baffles
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Selecting dynamicFvMesh solidBodyMotionFvMesh
Selecting solid-body motion function rotatingMotion
Applying solid body motion to cellZone rotatingZone
Reading thermophysical properties

Selecting thermodynamics package
{
    type            heRhoThermo;
    mixture         pureMixture;
    transport       const;
    thermo          hConst;
    equationOfState rhoConst;
    specie          specie;
    energy          sensibleInternalEnergy;
}

AMI: Creating addressing and weights between 96728 source faces and 96728 target faces
AMI: Patch source sum(weights) min/max/average = 1, 1.0006151, 1.0000008
AMI: Patch target sum(weights) min/max/average = 1, 1.0006151, 1.0000008
Reading transportProperties

Reading casting velocity

Reading field U

Reading/calculating face flux field phi

Creating turbulence model

Selecting turbulence model type RAS
Selecting RAS turbulence model kOmegaSST
Selecting patchDistMethod meshWave
bounding k, min: 0 max: 0.1 average: 0.1
bounding omega, min: 0 max: 1 average: 1
kOmegaSSTCoeffs
{
    alphaK1         0.85;
    alphaK2         1;
    alphaOmega1     0.5;
    alphaOmega2     0.856;
    gamma1          0.55555556;
    gamma2          0.44;
    beta1           0.075;
    beta2           0.0828;
    betaStar        0.09;
    a1              0.31;
    b1              1;
    c1              10;
    F3              false;
}


Reading g

Reading hRef
Calculating field g.h

Reading field p_rgh

Creating field dpdt

Creating field kinetic energy K

No MRF models present

Radiation model not active: radiationProperties not found
Selecting radiationModel none
Creating finite volume options from "constant/fvOptions"

Selecting finite volume options model type mushyZoneSource
    Source: melt1
    - selecting all cells
    - selected 4187281 cell(s) with volume 0.00070747277

PIMPLE: Operating solver in PISO mode

Reading/calculating face velocity rhoUf

Courant Number mean: 8.9612124e-05 max: 0.00078561122

Starting time loop

Courant Number mean: 8.8724876e-05 max: 0.00077783289
deltaT = 1.1764706e-05
Time = 1.176470588e-05

AMI: Creating addressing and weights between 96728 source faces and 96728 target faces
AMI: Patch source sum(weights) min/max/average = 0.9999976, 1.0006151, 1.0000007
AMI: Patch target sum(weights) min/max/average = 0.9999976, 1.0006151, 1.0000007
DICPCG:  Solving for pcorr, Initial residual = 1, Final residual = 0.0079730276, No Iterations 10
time step continuity errors : sum local = 0.0013459109, global = -0.00080712699, cumulative = -0.00080                   712699
Execution time for mesh.update() = 19.84 s
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
PIMPLE: iteration 1
- selecting all cells
- selected 4187281 cell(s) with volume 0.00070747277
- selecting all cells
- selected 4187281 cell(s) with volume 0.00070747277
DILUPBiCG:  Solving for Ux, Initial residual = 0.25250652, Final residual = 7.8829779e-09, No Iteratio                   ns 50
DILUPBiCG:  Solving for Uy, Initial residual = 0.29979727, Final residual = 7.9730354e-09, No Iteratio                   ns 49
DILUPBiCG:  Solving for Uz, Initial residual = 0.0012666971, Final residual = 9.3209637e-09, No Iterations 30
- selecting all cells
- selected 4187281 cell(s) with volume 0.00070747277
DILUPBiCG:  Solving for e, Initial residual = 0.044821635, Final residual = 8.8728646e-09, No Iterations 35


--> FOAM FATAL ERROR:
Maximum number of iterations exceeded

    From function Foam::scalar Foam::species::thermo<Thermo, Type>::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo<Thermo, Type>::*)(Foam::scalar, Foam::scalar)const, Foam::scalar (Foam::species::thermo<Thermo, Type>::*)(Foam::scalar, Foam::scalar)const, Foam::scalar (Foam::species::thermo<Thermo, Type>::*)(Foam::scalar)const) const [with Thermo = Foam::hConstThermo<Foam::rhoConst<Foam::specie> >; Type = Foam::sensibleInternalEnergy; Foam::scalar = double; Foam::species::thermo<Thermo, Type> = Foam::species::thermo<Foam::hConstThermo<Foam::rhoConst<Foam::specie> >, Foam::sensibleInternalEnergy>]
    in file /user/mxam/mxstbbl/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::error::abort() at ??:?
#2  Foam::heRhoThermo<Foam::rhoThermo, Foam::pureMixture<Foam::constTransport<Foam::species::thermo<Foam::hConstThermo<Foam::rhoConst<Foam::specie> >, Foam::sensibleInternalEnergy> > > >::calculate() at ??:?
#3  Foam::heRhoThermo<Foam::rhoThermo, Foam::pureMixture<Foam::constTransport<Foam::species::thermo<Foam::hConstThermo<Foam::rhoConst<Foam::specie> >, Foam::sensibleInternalEnergy> > > >::correct() at ??:?
#4  ? at ??:?
#5  __libc_start_main in "/lib64/libc.so.6"
#6  ? at ??:?
Aborted
The mesh looks all right:

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 4.1
Exec   : moveDynamicMesh -checkAMI
Date   : Aug 26 2017
Time   : 13:16:26
Host   : 
PID    : 71534
Case   : run/direct_chill_AMI_baffles
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Selecting dynamicFvMesh solidBodyMotionFvMesh
Selecting solid-body motion function rotatingMotion
Applying solid body motion to cellZone rotatingZone
Writing VTK files with weights of AMI patches.


PIMPLE: Operating solver in PISO mode

Time = 1e-05
PIMPLE: iteration 1
--> FOAM Warning :
    From function virtual bool Foam::solidBodyMotionFvMesh::update()
    in file solidBodyMotionFvMesh/solidBodyMotionFvMesh.C at line 228
    Did not find volVectorField U Not updating Uboundary conditions.
    Point usage OK.
    Upper triangular ordering OK.
    Topological cell zip-up check OK.
    Face vertices OK.
  <<Number of duplicate (not baffle) faces found: 4. This might indicate a problem.
  <<Number of faces with non-consecutive shared points: 4. This might indicate a problem.
    Mesh topology OK.
    Boundary openness (-3.6710028e-16 4.4562628e-16 6.7448791e-17) OK.
    Max cell openness = 5.9972489e-16 OK.
    Max aspect ratio = 25.272324 OK.
    Minimum face area = 2.7957022e-09. Maximum face area = 6.910027e-07.  Face area magnitudes OK.
    Min volume = 4.0550359e-13. Max volume = 3.4550135e-10.  Total volume = 0.00070747277.  Cell volumes OK.
    Mesh non-orthogonality Max: 68.822452 average: 7.674973
    Non-orthogonality check OK.
    Face pyramids OK.
    Max skewness = 3.3704271 OK.
    Mesh geometry OK.
Mesh OK.
Calculating AMI weights between owner patch: AMI1 and neighbour patch: AMI2
AMI: Creating addressing and weights between 96728 source faces and 96728 target faces
AMI: Patch source sum(weights) min/max/average = 0.99999763, 1.0006151, 1.0000007
AMI: Patch target sum(weights) min/max/average = 0.99999763, 1.0006151, 1.0000007
ExecutionTime = 51.69 s  ClockTime = 52 s
This problem occurs only if I create baffles (for sliding the rotatingZone). If I run the same solver for a few iterations, but without creating the baffles (i.e. no createBaffles and mergeOrSplitBaffles -split after snappyHexMesh), I get the following:

Code:
Starting time loop

Courant Number mean: 8.7933632e-05 max: 0.00077478393
deltaT = 1.1764706e-05
Time = 1.1764706e-05

DICPCG:  Solving for pcorr, Initial residual = 1, Final residual = 0.0090929751, No Iterations 13
time step continuity errors : sum local = 0.00051673172, global = -3.383239e-08, cumulative = -3.383239e-08
Execution time for mesh.update() = 1.35 s
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
PIMPLE: iteration 1
- selecting all cells
- selected 3470648 cell(s) with volume 0.00070742718
- selecting all cells
- selected 3470648 cell(s) with volume 0.00070742718
DILUPBiCG:  Solving for Ux, Initial residual = 0.2182415, Final residual = 6.5444622e-09, No Iterations 37
DILUPBiCG:  Solving for Uy, Initial residual = 0.26917409, Final residual = 8.6276434e-09, No Iterations 37
DILUPBiCG:  Solving for Uz, Initial residual = 0.034115545, Final residual = 8.0461001e-09, No Iterations 30
- selecting all cells
- selected 3470648 cell(s) with volume 0.00070742718
DILUPBiCG:  Solving for e, Initial residual = 0.046034907, Final residual = 7.1364143e-09, No Iterations 29
DICPCG:  Solving for p_rgh, Initial residual = 0.8427223, Final residual = 0.0082917735, No Iterations 119
- selecting all cells
- selected 3470648 cell(s) with volume 0.00070742718
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.4750221e-09, global = -9.8323748e-11, cumulative = -3.3930714e-08
DICPCG:  Solving for p_rgh, Initial residual = 0.17367083, Final residual = 9.4662022e-09, No Iterations 443
- selecting all cells
- selected 3470648 cell(s) with volume 0.00070742718
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 4.5486516e-15, global = 4.9450138e-18, cumulative = -3.3930714e-08
DILUPBiCG:  Solving for omega, Initial residual = 0.089374264, Final residual = 7.5486908e-09, No Iterations 23
DILUPBiCG:  Solving for k, Initial residual = 0.99999999, Final residual = 9.4425125e-09, No Iterations 41
ExecutionTime = 27.5 s  ClockTime = 28 s
What is going wrong here? My boundary conditions should be correct since the same solver works with the same mesh albeit without baffles.

Also, I am using rhoConst and hConst, so I did not expect the T calculation from e to diverge.

Code:
thermoType
{
    type            heRhoThermo;
    mixture         pureMixture;
    transport       const;
    thermo          hConst;
    equationOfState rhoConst;
    specie          specie;
    energy          sensibleInternalEnergy;
}
I can get the case running with same boundary and initial conditions with MRF also.
blebon is offline   Reply With Quote

Old   August 26, 2017, 18:43
Default Solved by removing cyclicAMI value
  #2
Member
 
Bruno Lebon
Join Date: Dec 2012
Posts: 33
Rep Power: 14
blebon is on a distinguished road
Weird resolution for this:

I managed to get rid of the error by removing the value key in the cyclicAMI boundary condition for T:

Code:
"AMI.*"
    {
        type            cyclicAMI;
    }
instead of

Code:
"AMI.*"
    {
        type            cyclicAMI;
        value           0;
    }
blebon is offline   Reply With Quote

Reply

Tags
ami, baffles


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
courant number increases to rather large values 6863523 OpenFOAM Running, Solving & CFD 22 July 6, 2023 00:48
Problem with chtMultiregionFoam radiation boundary condition baran_foam OpenFOAM Running, Solving & CFD 10 December 17, 2019 18:36
High Courant Number @ icoFoam Artex85 OpenFOAM Running, Solving & CFD 11 February 16, 2017 14:40
compressible flow in turbocharger riesotto OpenFOAM 50 May 26, 2014 02:47
pimpleFoam: turbulence->correct(); is not executed when using residualControl hfs OpenFOAM Running, Solving & CFD 3 October 29, 2013 09:35


All times are GMT -4. The time now is 10:36.