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Using rhoSimpleFoam for simulating steady state flow in a CD nozzle |
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January 14, 2020, 08:14
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Using rhoSimpleFoam for simulating steady state flow in a CD nozzle
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#1 |
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New Member
Vignesh
Join Date: Nov 2019
Location: Dresden, Germany
Posts: 2
Rep Power: 0  |
Hello everyone,
I'm trying to simulate a steady state CFD simulation in a CD nozzle using the solver rhoSimpleFoam. I'm facing some issues and I'm not able to validate my results. I have attached all my files below. I've created a very simple mesh in blockMesh, and have introduced mesh grading to refine the areas near the boundary. I attach my checkMesh results below Code:
Build : v1906 OPENFOAM=1906
Arch : "LSB;label=32;scalar=64"
Exec : checkMesh
Create time
Create mesh for time = 0
Time = 0
Mesh stats
points: 121402
internal points: 0
faces: 240700
internal faces: 119300
cells: 60000
faces per cell: 6
boundary patches: 5
point zones: 0
face zones: 0
cell zones: 0
Overall number of cells of each type:
hexahedra: 60000
prisms: 0
wedges: 0
pyramids: 0
tet wedges: 0
tetrahedra: 0
polyhedra: 0
Checking topology...
Boundary definition OK.
Cell to face addressing OK.
Point usage OK.
Upper triangular ordering OK.
Face vertices OK.
Number of regions: 1 (OK).
Checking patch topology for multiply connected surfaces...
Patch Faces Points Surface topology
inlet 100 202 ok (non-closed singly connected)
outlet 100 202 ok (non-closed singly connected)
upperWall 600 1202 ok (non-closed singly connected)
lowerWall 600 1202 ok (non-closed singly connected)
frontAndBack 120000 121402 ok (non-closed singly connected)
Checking faceZone topology for multiply connected surfaces...
No faceZones found.
Checking basic cellZone addressing...
No cellZones found.
Checking geometry...
Overall domain bounding box (0 0 -0.0005) (0.007 0.00065 0.0005)
Mesh has 2 geometric (non-empty/wedge) directions (1 1 0)
Mesh has 2 solution (non-empty) directions (1 1 0)
All edges aligned with or perpendicular to non-empty directions.
Boundary openness (-9.4603783e-18 -2.5693272e-15 -9.6253206e-16) OK.
Max cell openness = 3.1682644e-16 OK.
Max aspect ratio = 4.1564656 OK.
Minimum face area = 2.6926964e-11. Maximum face area = 1.1995734e-08. Face area magnitudes OK.
Min volume = 2.6926964e-14. Max volume = 1.3989641e-13. Total volume = 4.025e-09. Cell volumes OK.
Mesh non-orthogonality Max: 2.4483775 average: 1.6573628
Non-orthogonality check OK.
Face pyramids OK.
Max skewness = 0.1068957 OK.
Coupled point location match (average 0) OK.
Mesh OK.
End
For my boundary conditions, I specify that it is a pressure driven flow, with totalPressure BC at the inlet and fixedValue at the outlet. For velocity, I specify zeroGradient at both inlet and outlet, with noSlip at the top wall For temperature, I specify fixedValue at the inlet and zeroGradient at the outlet. I also use symmetryPlane BC for the lower wall. I have attached my boundary conditions below. Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1906 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
location "0";
object p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [1 -1 -2 0 0 0 0];
internalField uniform 101325;
boundaryField
{
inlet
{
type totalPressure;
p0 uniform 200000;
U U;
phi phi;
rho rho;
psi none;
gamma 1.4;
}
outlet
{
type fixedValue;
value uniform 101325;
U U;
phi phi;
rho rho;
psi none;
gamma 1.4;
}
upperWall
{
type zeroGradient;
}
lowerWall
{
type symmetryPlane;
}
frontAndBack
{
type empty;
}
defaultFaces
{
type empty;
}
}
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1906 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
location "0";
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 1 -1 0 0 0 0];
internalField uniform (0 0 0);
boundaryField
{
inlet
{
type zeroGradient;
}
outlet
{
type zeroGradient;
}
upperWall
{
type fixedValue;
value uniform (0 0 0);
}
lowerWall
{
type symmetryPlane;
}
frontAndBack
{
type empty;
}
}
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1906 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
location "0";
object T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 0 0 1 0 0 0];
internalField uniform 298;
boundaryField
{
inlet
{
type totalTemperature;
T0 uniform 298;
gamma 1.4;
}
outlet
{
type zeroGradient;
}
upperWall
{
type zeroGradient;
}
lowerWall
{
type symmetryPlane;
}
frontAndBack
{
type empty;
}
}
I have read many posts in this forum, and people have recommended using the above boundary conditions for this case, so I'm not sure if there is a problem with this. I'm attaching my fvSchemes, fvOptions and fvSolution files below. I'm not particularly sure as to which solver to use for this case, so I've just gone with the ones used in the tutorials. Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1906 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object fvSchemes;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
ddtSchemes
{
default steadyState;
}
gradSchemes
{
default Gauss linear;
}
divSchemes
{
default none;
div(phi,U) bounded Gauss upwind;
div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
div(phi,e) bounded Gauss upwind;
div(phi,epsilon) bounded Gauss upwind;
div(phi,k) bounded Gauss upwind;
div(phid,p) Gauss upwind;
div(phi,Ekp) bounded Gauss upwind;
div((phi|interpolate(rho)),p) Gauss upwind;
}
laplacianSchemes
{
default Gauss linear corrected;
}
interpolationSchemes
{
default linear;
}
gradSchemes
{
default faceMDLimited Gauss linear 0.5;
}
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1906 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
solvers
{
p
{
solver GAMG;
smoother GaussSeidel;
tolerance 1e-6;
relTol 0.01;
}
"(U|k|omega|e)"
{
solver PBiCGStab;
preconditioner DILU;
tolerance 1e-6;
relTol 0.01;
}
}
SIMPLE
{
residualControl
{
p 1e-4;
U 1e-4;
"(k|omega|e)" 1e-4;
}
nNonOrthogonalCorrectors 0;
pMinFactor 0.1;
pMaxFactor 2;
}
relaxationFactors
{
fields
{
p 0.7;
rho 0.01;
}
equations
{
U 0.3;
e 0.7;
"(k|omega)" 0.7;
}
}
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v1906 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object fvOptions;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
limitT
{
type limitTemperature;
min 101;
max 1000;
selectionMode all;
}
I'm getting some pretty weird results, and I'm not able to validate my pressure and velocity plots with the literature. Code:
# Solver information # Time U_solver Ux_initial Ux_final Ux_iters Uy_initial Uy_final Uy_iters U_converged p_solver p_initial p_final p_iters p_converged 1 DILUPBiCGStab 1.00000000e+00 5.63145200e-03 1 1.00000000e+00 1.18017460e-03 1 false GAMG 1.00000000e+00 3.08416040e-03 1 true 2 DILUPBiCGStab 5.45963700e-01 1.69905430e-03 1 3.80739180e-01 1.41675240e-03 1 false GAMG 2.26367420e-01 1.35376850e-03 3 true 3 DILUPBiCGStab 4.30959060e-01 1.18852260e-03 1 2.92858160e-01 9.58617740e-04 1 false GAMG 5.43492460e-02 3.31423630e-04 5 true 4 DILUPBiCGStab 3.20779760e-01 8.65311860e-04 1 3.13826670e-01 9.23813840e-04 1 false GAMG 1.69414160e-02 1.34136910e-04 5 true 5 DILUPBiCGStab 2.56209780e-01 6.71257920e-04 1 1.71144620e-01 1.22977570e-03 1 false GAMG 1.21129840e-02 1.03227820e-04 7 true 6 DILUPBiCGStab 2.17978780e-01 6.08204110e-04 1 9.04764450e-02 7.59603610e-04 1 false GAMG 6.80493660e-03 3.89629250e-05 9 true 7 DILUPBiCGStab 1.88510680e-01 5.48296570e-04 1 5.44852170e-02 5.07802030e-04 1 false GAMG 3.11672060e-03 1.45205410e-05 8 true 8 DILUPBiCGStab 1.65910160e-01 5.03121960e-04 1 5.41494690e-02 2.58120990e-04 1 false GAMG 1.78527080e-03 1.27787290e-05 10 true 9 DILUPBiCGStab 1.48527580e-01 4.63248670e-04 1 5.09946720e-02 1.67642980e-04 1 false GAMG 1.64403040e-03 1.33992420e-05 7 true 10 DILUPBiCGStab 1.35567040e-01 4.37185820e-04 1 4.29566890e-02 1.33335920e-04 1 false GAMG 1.14007820e-03 5.09410220e-06 9 true 11 DILUPBiCGStab 1.25101200e-01 4.15358040e-04 1 3.67467390e-02 1.16270810e-04 1 false GAMG 6.55856160e-04 5.55730280e-06 10 true 12 DILUPBiCGStab 1.16331370e-01 3.94785310e-04 1 3.33904360e-02 1.14179040e-04 1 false GAMG 4.08227720e-04 2.61137050e-06 10 true 13 DILUPBiCGStab 1.08920730e-01 3.77537340e-04 1 3.04151770e-02 1.00107160e-04 1 false GAMG 3.19891450e-04 1.40731650e-06 10 true 14 DILUPBiCGStab 1.02434070e-01 3.60374460e-04 1 2.76140780e-02 8.70842780e-05 1 false GAMG 3.38320430e-04 2.80018250e-06 8 true 15 DILUPBiCGStab 9.68027690e-02 3.45042220e-04 1 2.51560640e-02 7.97026030e-05 1 false GAMG 2.95921630e-04 2.04757530e-06 10 true 16 DILUPBiCGStab 9.18175200e-02 3.30619640e-04 1 2.31945540e-02 7.53207720e-05 1 false GAMG 2.78887010e-04 2.13555550e-06 10 true 17 DILUPBiCGStab 8.73560160e-02 3.17040200e-04 1 2.14896960e-02 7.10223110e-05 1 false GAMG 2.61539370e-04 1.78062630e-06 10 true 18 DILUPBiCGStab 8.33385690e-02 3.04377940e-04 1 2.00176410e-02 6.69856460e-05 1 false GAMG 2.39387170e-04 1.52502490e-06 10 true 19 DILUPBiCGStab 7.96829250e-02 2.92397810e-04 1 1.87329790e-02 6.35358290e-05 1 false GAMG 2.24885040e-04 1.49790800e-06 10 true 20 DILUPBiCGStab 7.63413040e-02 2.81126890e-04 1 1.75887980e-02 6.02910410e-05 1 false GAMG 2.10218520e-04 1.53493880e-06 10 true 21 DILUPBiCGStab 7.32650410e-02 2.70438530e-04 1 1.65726370e-02 5.73083060e-05 1 false GAMG 1.91872990e-04 1.52267420e-06 10 true 22 DILUPBiCGStab 7.04232370e-02 2.60365690e-04 1 1.56758180e-02 5.46103790e-05 1 false GAMG 1.81844850e-04 1.50381060e-06 10 true 23 DILUPBiCGStab 6.77782630e-02 2.50757110e-04 1 1.48653250e-02 5.21972350e-05 1 false GAMG 1.72173430e-04 1.45175550e-06 10 true 24 DILUPBiCGStab 6.53140050e-02 2.41670020e-04 1 1.41437450e-02 4.99757360e-05 1 false GAMG 1.73370400e-04 1.46278090e-06 10 true 25 DILUPBiCGStab 6.30025590e-02 2.32989500e-04 1 1.34863160e-02 4.79381780e-05 1 false GAMG 1.71632110e-04 1.44063250e-06 10 true 26 DILUPBiCGStab 6.08374200e-02 2.24776930e-04 1 1.28970280e-02 4.60580520e-05 1 false GAMG 1.79620720e-04 1.48070940e-06 10 true 27 DILUPBiCGStab 5.87925880e-02 2.16906900e-04 1 1.23541050e-02 4.43544230e-05 1 false GAMG 1.78122980e-04 1.47343430e-06 10 true 28 DILUPBiCGStab 5.68701380e-02 2.09467830e-04 1 1.18693010e-02 4.27715320e-05 1 false GAMG 1.92241980e-04 1.55318520e-06 10 true 29 DILUPBiCGStab 5.50387110e-02 2.02284800e-04 1 1.14108410e-02 4.13368420e-05 1 false GAMG 1.83502800e-04 1.52036720e-06 10 true 30 DILUPBiCGStab 5.33225160e-02 1.95563590e-04 1 1.10138510e-02 3.99818580e-05 1 false GAMG 2.19881880e-04 1.69307790e-06 10 true 31 DILUPBiCGStab 5.16611490e-02 1.88944310e-04 1 1.06115980e-02 3.87271670e-05 1 false GAMG 1.94226080e-04 1.05166710e-06 9 true 32 DILUPBiCGStab 5.01307010e-02 1.82932710e-04 1 1.03014500e-02 3.75655170e-05 1 false GAMG 2.83234270e-04 2.64408350e-06 9 true 33 DILUPBiCGStab 4.85968080e-02 1.76766330e-04 1 9.92182590e-03 3.64379860e-05 1 false GAMG 2.07138410e-04 1.01193740e-06 11 true 34 DILUPBiCGStab 4.72464770e-02 1.71468870e-04 1 9.69155610e-03 3.55057620e-05 1 false GAMG 3.93283910e-04 3.05400540e-06 9 true 35 DILUPBiCGStab 4.58148180e-02 1.65662860e-04 1 9.31109310e-03 3.43954260e-05 1 false GAMG 2.28560780e-04 1.92363650e-06 11 true 36 DILUPBiCGStab 4.45977370e-02 1.60842140e-04 1 9.16470370e-03 3.39266820e-05 1 false GAMG 4.28370440e-04 3.43084120e-06 9 true 37 DILUPBiCGStab 4.32852850e-02 1.55414630e-04 1 8.82190370e-03 3.25834400e-05 1 false GAMG 2.43366240e-04 1.66772150e-06 11 true 38 DILUPBiCGStab 4.21815780e-02 1.51078060e-04 1 8.64352460e-03 3.19734930e-05 1 false GAMG 4.77693940e-04 3.41435100e-06 9 true 39 DILUPBiCGStab 4.09662000e-02 1.46093860e-04 1 8.34459010e-03 3.09677080e-05 1 false GAMG 2.72134740e-04 2.10972370e-06 11 true 40 DILUPBiCGStab 3.99430810e-02 1.42052270e-04 1 8.22838910e-03 3.06635910e-05 1 false GAMG 4.75725740e-04 3.50940940e-06 9 true I've attached my residuals log for the first 40 iterations. I notice that U_converged is always false, all the way, while p_converged is showing true. I don't know if it's a problem with my boundary conditions, mesh or system properties. I've been breaking my head with this for a while. Can someone please help me out? I'd really appreciate it. |
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February 3, 2020, 10:57
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#2 |
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Member
Petros Ampatzidis
Join Date: Oct 2018
Location: Bath, UK
Posts: 64
Rep Power: 8 |
Hi Vignesh,
I am faced with a similar issue. I am running simpleFoam and although SIMPLE solution seems to converge before reaching the dedicated number of iterations, U_converged is always False in the residuals file. Have you found any solution to your problem? Petros |
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July 7, 2020, 20:43
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#3 | |
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Member
Daniel
Join Date: Sep 2010
Location: the Netherlands
Posts: 44
Rep Power: 16 |
Did anyone face a similar problem and found a solution? Or know about a similar (solved) thread?
Quote:
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July 18, 2020, 08:21
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#4 | |
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Super Moderator
Tobias Holzmann
Join Date: Oct 2010
Location: Bad Wörishofen
Posts: 2,711
Blog Entries: 6
Rep Power: 52   |
Quote:
I am not sure why you ask this and I believe it is the reason that you mis-understand things here. All your quantities for Ux, Uy and Uz are larger than 1e-4. Code:
Ux = 3.99e-2 Uy = 8.22e-3 Uz = empty 
__________________
Keep foaming, Tobias Holzmann |
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February 10, 2021, 15:14
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U_converged = false
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#5 |
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New Member
Benjamin Norris
Join Date: Oct 2020
Location: California
Posts: 17
Rep Power: 6 |
Hi Tobi et al.,
Apologies to hijack this thread, but I am having the same issue with my interFoam model. The model simulates a wave train across a rough bottom. My model uses the k-epsilon turbulence closure scheme and I have set the fvSolutions to what I think are tight tolerances for pressure, velocity, and turbulence. When I check the residuals, I am also seeing U_converged = false for all timesteps, while the other parameters (p_rgh, k, epsilon) = true. The initial values for Ux and Uz are O(10^-4) and final values O(10^-10). I think (?) these values are appropriate, but I am still an OpenFOAM beginner and have much to learn. I have attached my case as a zip file, and a subset of the residuals (between timesteps 74 and 74.25 s) are below. Please note my case does not include the mesh because it is too large to upload to this forum. I do not think my issue is related to the mesh as checkMesh returns "ok" for all fields. Thank you. Ben Code:
# Solver information # Time U_solver Ux_initial Ux_final Ux_iters Uz_initial Uz_final Uz_iters U_converged k_solver k_initial k_final k_iters k_converged p_rgh_solver p_rgh_initial p_rgh_final p_rgh_iters p_rgh_converged epsilon_solver epsilon_initial epsilon_final epsilon_iters epsilon_converged 74 DILUPBiCGStab 4.006390e-04 1.671520e-09 1 1.256120e-03 4.949610e-09 1 false DILUPBiCGStab 1.073630e-03 2.223450e-09 1 true DICPCG 2.547670e-03 9.928240e-07 97 true DILUPBiCGStab 1.509320e-03 2.957190e-09 1 true 74.0078 DILUPBiCGStab 3.675810e-04 1.131180e-09 1 1.186660e-03 3.313750e-09 1 false DILUPBiCGStab 9.478730e-04 1.447630e-09 1 true DICPCG 2.815580e-03 9.289800e-07 99 true DILUPBiCGStab 1.335080e-03 1.985770e-09 1 true 74.0156 DILUPBiCGStab 3.668450e-04 1.132490e-09 1 1.180980e-03 3.317960e-09 1 false DILUPBiCGStab 9.483030e-04 1.464180e-09 1 true DICPCG 2.830190e-03 9.412030e-07 99 true DILUPBiCGStab 1.340930e-03 1.957330e-09 1 true 74.0234 DILUPBiCGStab 3.665610e-04 1.135770e-09 1 1.179020e-03 3.361480e-09 1 false DILUPBiCGStab 9.490000e-04 1.468220e-09 1 true DICPCG 2.845550e-03 9.390510e-07 99 true DILUPBiCGStab 1.347280e-03 1.982700e-09 1 true 74.0312 DILUPBiCGStab 3.660440e-04 1.141450e-09 1 1.178930e-03 3.456610e-09 1 false DILUPBiCGStab 9.497780e-04 1.478040e-09 1 true DICPCG 2.860480e-03 9.420370e-07 99 true DILUPBiCGStab 1.353560e-03 2.001070e-09 1 true 74.0391 DILUPBiCGStab 3.659540e-04 1.142890e-09 1 1.178020e-03 3.431430e-09 1 false DILUPBiCGStab 9.509160e-04 1.490620e-09 1 true DICPCG 2.876190e-03 9.454020e-07 99 true DILUPBiCGStab 1.359840e-03 1.989490e-09 1 true 74.0469 DILUPBiCGStab 3.659140e-04 1.144960e-09 1 1.175950e-03 3.434170e-09 1 false DILUPBiCGStab 9.512020e-04 1.507280e-09 1 true DICPCG 2.892380e-03 9.479810e-07 99 true DILUPBiCGStab 1.365800e-03 1.982210e-09 1 true 74.0547 DILUPBiCGStab 3.653190e-04 1.144550e-09 1 1.176260e-03 3.372510e-09 1 false DILUPBiCGStab 9.518550e-04 1.529590e-09 1 true DICPCG 2.908370e-03 9.511380e-07 99 true DILUPBiCGStab 1.371740e-03 1.971270e-09 1 true 74.0625 DILUPBiCGStab 3.653970e-04 1.144830e-09 1 1.171660e-03 3.349070e-09 1 false DILUPBiCGStab 9.527360e-04 1.544620e-09 1 true DICPCG 2.926000e-03 9.579410e-07 99 true DILUPBiCGStab 1.377870e-03 1.947170e-09 1 true 74.0703 DILUPBiCGStab 3.649560e-04 1.148800e-09 1 1.172070e-03 3.391810e-09 1 false DILUPBiCGStab 9.533970e-04 1.564550e-09 1 true DICPCG 2.943060e-03 9.605520e-07 99 true DILUPBiCGStab 1.384170e-03 1.929200e-09 1 true 74.0771 DILUPBiCGStab 3.347940e-04 7.702510e-10 1 1.111930e-03 2.289350e-09 1 false DILUPBiCGStab 8.366920e-04 9.786550e-10 1 true DICPCG 3.296090e-03 9.393230e-07 101 true DILUPBiCGStab 1.216480e-03 1.284080e-09 1 true 74.084 DILUPBiCGStab 3.340760e-04 7.755790e-10 1 1.106820e-03 2.312830e-09 1 false DILUPBiCGStab 8.373840e-04 9.887800e-10 1 true DICPCG 3.312030e-03 9.217870e-07 101 true DILUPBiCGStab 1.220410e-03 1.272920e-09 1 true 74.0908 DILUPBiCGStab 3.336870e-04 7.737800e-10 1 1.106140e-03 2.216780e-09 1 false DILUPBiCGStab 8.378130e-04 1.002850e-09 1 true DICPCG 3.327590e-03 9.159130e-07 101 true DILUPBiCGStab 1.224260e-03 1.264000e-09 1 true 74.0977 DILUPBiCGStab 3.332820e-04 7.764860e-10 1 1.103290e-03 2.220500e-09 1 false DILUPBiCGStab 8.383610e-04 1.011400e-09 1 true DICPCG 3.343770e-03 9.146800e-07 101 true DILUPBiCGStab 1.228140e-03 1.251800e-09 1 true 74.1045 DILUPBiCGStab 3.328540e-04 7.782340e-10 1 1.103420e-03 2.223400e-09 1 false DILUPBiCGStab 8.385670e-04 1.027800e-09 1 true DICPCG 3.360250e-03 9.172290e-07 101 true DILUPBiCGStab 1.231930e-03 1.244180e-09 1 true 74.1113 DILUPBiCGStab 3.327080e-04 7.779960e-10 1 1.101150e-03 2.195090e-09 1 false DILUPBiCGStab 8.389420e-04 1.045750e-09 1 true DICPCG 3.377620e-03 9.121430e-07 101 true DILUPBiCGStab 1.235520e-03 1.239760e-09 1 true 74.1182 DILUPBiCGStab 3.322000e-04 7.798310e-10 1 1.100970e-03 2.194550e-09 1 false DILUPBiCGStab 8.392080e-04 1.055850e-09 1 true DICPCG 3.394440e-03 8.984390e-07 101 true DILUPBiCGStab 1.239010e-03 1.228510e-09 1 true 74.125 DILUPBiCGStab 3.320890e-04 7.820510e-10 1 1.100670e-03 2.186770e-09 1 false DILUPBiCGStab 8.397360e-04 1.066090e-09 1 true DICPCG 3.413100e-03 9.991530e-07 100 true DILUPBiCGStab 1.242330e-03 1.218330e-09 1 true 74.1319 DILUPBiCGStab 3.353430e-04 8.229510e-10 1 1.104640e-03 2.288990e-09 1 false DILUPBiCGStab 8.531190e-04 1.142360e-09 1 true DICPCG 3.387290e-03 9.689490e-07 100 true DILUPBiCGStab 1.265160e-03 1.266340e-09 1 true 74.1389 DILUPBiCGStab 3.350330e-04 8.278180e-10 1 1.104040e-03 2.298910e-09 1 false DILUPBiCGStab 8.532030e-04 1.155770e-09 1 true DICPCG 3.406550e-03 9.633850e-07 100 true DILUPBiCGStab 1.268200e-03 1.253300e-09 1 true 74.1458 DILUPBiCGStab 3.349180e-04 8.313580e-10 1 1.101420e-03 2.297410e-09 1 false DILUPBiCGStab 8.532190e-04 1.172850e-09 1 true DICPCG 3.427010e-03 9.628180e-07 100 true DILUPBiCGStab 1.270850e-03 1.240410e-09 1 true 74.1528 DILUPBiCGStab 3.345940e-04 8.339030e-10 1 1.100810e-03 2.319730e-09 1 false DILUPBiCGStab 8.536660e-04 1.192870e-09 1 true DICPCG 3.446500e-03 9.684660e-07 100 true DILUPBiCGStab 1.273410e-03 1.228900e-09 1 true 74.1593 DILUPBiCGStab 3.203330e-04 6.804190e-10 1 1.070920e-03 1.891990e-09 1 false DILUPBiCGStab 7.976560e-04 9.301900e-10 1 true DICPCG 3.673590e-03 9.381040e-07 101 true DILUPBiCGStab 1.191260e-03 9.862140e-10 1 true 74.1657 DILUPBiCGStab 3.204180e-04 6.821850e-10 1 1.067000e-03 1.885890e-09 1 false DILUPBiCGStab 7.984470e-04 9.402180e-10 1 true DICPCG 3.692980e-03 9.364430e-07 101 true DILUPBiCGStab 1.194080e-03 9.694410e-10 1 true 74.1722 DILUPBiCGStab 3.197700e-04 6.841930e-10 1 1.066180e-03 1.883800e-09 1 false DILUPBiCGStab 7.984390e-04 9.475690e-10 1 true DICPCG 3.711180e-03 9.510730e-07 101 true DILUPBiCGStab 1.195660e-03 9.586410e-10 1 true 74.1787 DILUPBiCGStab 3.199420e-04 6.867710e-10 1 1.064600e-03 1.904370e-09 1 false DILUPBiCGStab 7.995010e-04 9.493260e-10 1 true DICPCG 3.731820e-03 9.656830e-07 101 true DILUPBiCGStab 1.198060e-03 9.466950e-10 1 true 74.1852 DILUPBiCGStab 3.194780e-04 6.895830e-10 1 1.063310e-03 1.921970e-09 1 false DILUPBiCGStab 8.002090e-04 9.330530e-10 1 true DICPCG 3.750980e-03 9.899740e-07 101 true DILUPBiCGStab 1.199810e-03 9.310270e-10 1 true 74.1917 DILUPBiCGStab 3.194320e-04 6.921130e-10 1 1.063340e-03 1.931700e-09 1 false DILUPBiCGStab 8.002920e-04 9.400920e-10 1 true DICPCG 3.771640e-03 9.938730e-07 101 true DILUPBiCGStab 1.200870e-03 9.139940e-10 1 true 74.1981 DILUPBiCGStab 3.194180e-04 6.953000e-10 1 1.060560e-03 1.938390e-09 1 false DILUPBiCGStab 8.009430e-04 9.412560e-10 1 true DICPCG 3.792370e-03 9.927820e-07 101 true DILUPBiCGStab 1.202940e-03 9.092870e-10 1 true 74.2046 DILUPBiCGStab 3.189950e-04 6.971790e-10 1 1.061010e-03 1.937030e-09 1 false DILUPBiCGStab 8.016590e-04 9.425830e-10 1 true DICPCG 3.813560e-03 9.747890e-07 101 true DILUPBiCGStab 1.205390e-03 8.899870e-10 1 true 74.2111 DILUPBiCGStab 3.190290e-04 6.997840e-10 1 1.058620e-03 1.941140e-09 1 false DILUPBiCGStab 8.024820e-04 9.443380e-10 1 true DICPCG 3.834910e-03 9.552270e-07 101 true DILUPBiCGStab 1.207820e-03 8.702000e-10 1 true 74.2176 DILUPBiCGStab 3.186930e-04 7.014400e-10 1 1.060100e-03 1.941760e-09 1 false DILUPBiCGStab 8.029270e-04 9.444550e-10 1 true DICPCG 3.856600e-03 9.510220e-07 101 true DILUPBiCGStab 1.210220e-03 8.509680e-10 1 true 74.2241 DILUPBiCGStab 3.184910e-04 7.031740e-10 1 1.059660e-03 1.942760e-09 1 false DILUPBiCGStab 8.033520e-04 9.453160e-10 1 true DICPCG 3.879160e-03 9.501790e-07 101 true DILUPBiCGStab 1.212510e-03 8.418080e-10 1 true 74.2306 DILUPBiCGStab 3.186290e-04 7.052020e-10 1 1.056830e-03 1.943750e-09 1 false DILUPBiCGStab 8.042540e-04 9.453210e-10 1 true DICPCG 3.902040e-03 9.557760e-07 101 true DILUPBiCGStab 1.215020e-03 8.363900e-10 1 true 74.237 DILUPBiCGStab 3.180920e-04 7.070520e-10 1 1.058550e-03 1.945430e-09 1 false DILUPBiCGStab 8.052120e-04 9.448860e-10 1 true DICPCG 3.925490e-03 9.498730e-07 101 true DILUPBiCGStab 1.217810e-03 8.338450e-10 1 true 74.2435 DILUPBiCGStab 2.231170e-04 4.982210e-10 1 7.489500e-04 1.303840e-09 1 false DILUPBiCGStab 8.064960e-04 9.430960e-10 1 true DICPCG 3.861300e-03 9.689160e-07 100 true DILUPBiCGStab 1.220680e-03 8.260530e-10 1 true 74.25 DILUPBiCGStab 2.233570e-04 5.020770e-10 1 7.468910e-04 1.309890e-09 1 false DILUPBiCGStab 8.075350e-04 9.421010e-10 1 true DICPCG 3.885940e-03 9.699520e-07 100 true DILUPBiCGStab 1.223710e-03 8.177950e-10 1 true |
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March 6, 2024, 03:09
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U_converged is all false
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#6 |
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New Member
Zhang Xuan
Join Date: Aug 2021
Posts: 1
Rep Power: 0 |
I also have the same problem.
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June 30, 2024, 01:46
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#7 |
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Senior Member
Kumaresh
Join Date: Oct 2016
Posts: 355
Rep Power: 12  |
Hello everyone,
It seems this thread is still open and not resolved. I am facing the same issue. I implemented the below snippet in the function object in OpenFOAM ESI version. solverInfo { type solverInfo; libs ("libutilityFunctionObjects.so"); fields (U p k epsilon); writeResidualFields no; executeControl timeStep; executeInterval 10; } Here is my output, where "U_converged" results in "FALSE", where p, k, and epsilon shows convergence. #Time U_solver Ux_initial Ux_final Ux_iters Uy_initial Uy_final Uy_iters Uz_initial Uz_final Uz_iters U_converged k_solver k_initial k_final k_iters k_converged p_solver p_initial p_final p_iters p_converged epsilon_solver epsilon_initial epsilon_final epsilon_iters epsilon_converged 1.20E-08 smoothSolver 3.70E-05 4.68E-17 15 3.71E-05 4.72E-17 15 1.62E-06 2.49E-17 15 FALSE smoothSolver 1.00E+00 3.57E-12 15 TRUE GAMG 1.00E+00 8.07E-04 13 TRUE smoothSolver 9.84E-06 8.04E-19 15 TRUE 2.64E-08 smoothSolver 1.86E-03 5.01E-17 15 1.85E-03 5.04E-17 15 8.22E-05 2.37E-17 15 FALSE smoothSolver 6.46E-03 1.61E-14 15 TRUE GAMG 1.81E-01 1.62E-04 13 TRUE smoothSolver 7.43E-06 4.49E-19 15 TRUE I tried checking parameters in fvOptions for solution convergence, but no success. Can someone help me out here ? Thank you |
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| Tags |
| nozzle, rhosimplefoam |
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