chtMultiRegionFoam solid heat source problems

Almanzo2000 · March 7, 2022, 05:27

Hi,

I'm trying to do a sub-channel analysis with a solid heat source, metal heat conductor, and fluid region.

I'm using the Cooling Sphere tutorial as a template to change,

and I also use my own mesh,

but when solving the solid region it always diverge,

any Idea why?

Code:

Solving for solid region fuel
DICPCG:  Solving for e, Initial residual = 0.91080556, Final residual = 6.9552522e-07, No Iterations 20

    From function static Foam::scalar Foam::species::thermo<Thermo, Type>::T(const ThermoType&, Foam::scalar, Foam::scalar, Foam::scalar, FType, dFdTType, LimitType, bool) [with ThermoType = Foam::species::thermo<Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >, Foam::sensibleInternalEnergy>; FType = double (Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >::*)(double, double) const; dFdTType = double (Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >::*)(double, double) const; LimitType = double (Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >::*)(double) const; Thermo = Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >; Type = Foam::sensibleInternalEnergy; Foam::scalar = double]
    in file /home/ubuntu/OpenFOAM/OpenFOAM-9/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 313
    Energy -> temperature conversion failed to converge:
            iter            Test             e/h            Cv/p            Tnew
               0       869.56531       167320.37       337.65469      -380.10769
               1      -380.10769      -60096.652       -132.8083       1084.7175
               2       1084.7175       243791.53       375.26624      -243.48386
               3      -243.48386      -70266.402      -20.043428       8955.1014
               4       8955.1014   2.3372247e+08       111802.22       6862.3244
               5       6862.3244        74351074         46770.9       5267.1935
               6       5267.1935        23771955       19348.485       4025.4119
               7       4025.4119       7667991.1       7788.7363       3008.2214
               8       3008.2214       2505761.3       2932.9298       2067.0469
               9       2067.0469       822118.61       960.78068        946.3372
              10        946.3372       193698.92       349.71963      -335.65119
              11      -335.65119      -65116.767      -93.475167       1691.8479
              12       1691.8479       531592.63       619.55175       422.81719
              13       422.81719       31442.105       266.33449      -651.31968
              14      -651.31968       14356.362      -434.91242      -32.818266
              15      -32.818266      -59838.533       111.12248      -1785.8304
              16      -1785.8304       1855655.5      -3318.8958      -1149.9885
              17      -1149.9885       434288.03      -1331.5993      -632.62143
              18      -632.62143       6454.5651      -410.37648       3.6044791
              19       3.6044791      -55457.542       129.23706      -1537.5947
              20      -1537.5947       1147867.8      -2413.4228      -956.46759
              21      -956.46759       217313.62      -924.32557      -445.87779
              22      -445.87779      -49318.182      -195.96347       601.86543
              23       601.86543       82142.606       298.44843      -526.57135
              24      -526.57135      -30099.319      -281.99382       269.68109
              25       269.68109      -6632.5895       229.01841      -813.22309
              26      -813.22309       103401.46      -672.85832      -281.10654
              27      -281.10654       -68977.97      -48.736603       3528.3427
              28       3528.3427       4529973.3       4986.7123       2568.8707
              29       2568.8707       1488797.4       1775.0036       1586.6558
              30       1586.6558       469916.58       555.04296        281.2538
              31        281.2538      -3963.3894        232.2607       -798.0256
              32       -798.0256       93361.303      -648.50511      -261.40857
              33      -261.40857      -69787.119      -33.498549       5256.7548
              34       5256.7548        23570655       19219.726       4017.1277
              35       4017.1277       7603692.7       7734.4994       3001.1175
              36       3001.1175       2485006.5       2910.3287       2059.7654
              37       2059.7654       815153.83       952.25312       936.33362
              38       936.33362       190208.69       348.08212      -341.65869
              39      -341.65869      -64539.735      -98.636962       1585.5889
              40       1585.5889       469324.76       554.44771       279.85291
              41       279.85291      -4288.4908        231.8723      -799.83231
              42      -799.83231       94535.556      -651.37765      -263.77901
              43      -263.77901      -69705.571      -35.307074       4974.0385
              44       4974.0385        18608722       15951.847       3791.5197
              45       3791.5197       6017569.3       6358.4468       2805.0828
              46       2805.0828       1972117.5       2338.8209       1852.9983
              47       1852.9983       640954.74       743.00497       647.63309
              48       647.63309        95963.19       305.44277      -500.21132
              49      -500.21132      -37145.858       -252.8205        360.0501
              50        360.0501       15153.029       252.41207      -708.79978
              51      -708.79978       41602.777      -514.06466      -132.52916
              52      -132.52916      -68201.144       54.950664       -3525.326
              53       -3525.326        16832769      -15964.641      -2454.9977
              54      -2454.9977       5137415.3      -6747.0309      -1655.8236
              55      -1655.8236         1456993      -2822.4165       -1049.382
              56       -1049.382       311669.64      -1109.7384      -539.07509
              57      -539.07509      -26484.752       -296.2041        231.1804
              58        231.1804      -15234.196       217.66099       -868.7107
              59       -868.7107       143279.59       -765.4945      -348.89354
              60      -348.89354      -63803.437      -104.91635       1470.0235
              61       1470.0235       408724.37       496.38219       133.62996
              62       133.62996      -34905.836         184.563      -1056.9215
              63      -1056.9215       320096.16      -1125.5903      -546.31497
              64      -546.31497      -24310.133      -304.54285       209.99058
              65       209.99058      -19776.516       211.01764      -903.00202
              66      -903.00202       170555.54      -825.72833      -388.07101
              67      -388.07101      -59009.944      -140.13492       1007.9239
              68       1007.9239       215559.29       360.35479      -296.89257
              69      -296.89257      -68109.892      -61.295942        2746.175
              70        2746.175       1838885.9        2185.977       1788.4689
              71       1788.4689       594756.29       689.74141       557.00178
              72       557.00178       68913.658       291.22143      -554.01276
              73      -554.01276      -21931.417      -313.49875       188.27462
              74       188.27462      -24282.306       203.90501      -941.44395
              75      -941.44395       203639.97      -896.03522      -429.99356
              76      -429.99356      -52304.866      -180.15317       693.12137
              77       693.12137       110010.11       312.12884      -475.13883
              78      -475.13883      -43147.052      -226.04302       460.48189
              79       460.48189       41617.998       273.91789      -621.06699
              80      -621.06699       1799.0158      -395.50603       27.308975
              81       27.308975       -52260.98       140.38083      -1414.3167
              82      -1414.3167       874528.69      -2027.8714      -857.49329
              83      -857.49329       134800.66      -746.29018      -335.66109
              84      -335.66109      -65115.842      -93.483635       1691.6643
              85       1691.6643       531478.85       619.42868       422.56507
              86       422.56507       31374.964        266.2819      -651.53179
              87      -651.53179       14448.643      -435.19413      -33.218697
              88      -33.218697      -59882.989       110.91647       -1789.086
              89       -1789.086       1866481.6      -3331.9784      -1152.4915
              90      -1152.4915       437628.24      -1337.4087       -634.8742
              91       -634.8742       7382.3411      -413.30159     -0.90633967
              92     -0.90633967      -56035.602       127.05964      -1563.9675
              93      -1563.9675       1212670.4       -2501.254      -977.33853
              94      -977.33853       237021.75       -964.3965      -467.52815
              95      -467.52815      -44837.109      -218.09913       494.42192
              96       494.42192       51024.525       280.32131      -595.97721
              97      -595.97721       -7726.399      -363.97187       82.402644
              98       82.402644      -43853.125       164.41499      -1199.6244
              99      -1199.6244       503285.68      -1449.5022      -676.73916
             100      -676.73916       25845.263      -469.21523      -78.969035
             101      -78.969035      -64403.546       86.362878      -2281.6983


--> FOAM FATAL ERROR:
Maximum number of iterations exceeded: 100

    From function static Foam::scalar Foam::species::thermo<Thermo, Type>::T(const ThermoType&, Foam::scalar, Foam::scalar, Foam::scalar, FType, dFdTType, LimitType, bool) [with ThermoType = Foam::species::thermo<Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >, Foam::sensibleInternalEnergy>; FType = double (Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >::*)(double, double) const; dFdTType = double (Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >::*)(double, double) const; LimitType = double (Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >::*)(double) const; Thermo = Foam::ePolynomialThermo<Foam::rhoConst<Foam::specie> >; Type = Foam::sensibleInternalEnergy; Foam::scalar = double]
    in file /home/ubuntu/OpenFOAM/OpenFOAM-9/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 348.

I'm kinda new to chtMultiRegionFoam solver, so I'm using the default fvSchemes from the tutorial files.

Thanks!

smrutishah20 · July 7, 2023, 18:43

Hey did you find a solution for this? I am also using solid heat source and it is not passing the heat to fluid region.

Almanzo2000 · July 13, 2023, 06:52

Quote:

Originally Posted by smrutishah20

Hey did you find a solution for this? I am also using solid heat source and it is not passing the heat to fluid region.

What solver are you using? for me I use chtMultiRegionFoam

I suggest using the tutorial file as the foundation and changing some parameters if needed.

Another thing to check is the mesh, make sure to have a proper mesh in the boundary layer region.

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July 7, 2023, 18:43		#2
smrutishah20 New Member Smruti Join Date: Sep 2022 Posts: 2 Rep Power: 0	Hey did you find a solution for this? I am also using solid heat source and it is not passing the heat to fluid region.