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February 6, 2015, 04:20
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Conjugate heat transfer high speed gas flow
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#1 |
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New Member
Jakob Trydal
Join Date: Mar 2014
Posts: 1
Rep Power: 0  |
Hi!
First, I must say that this forum has been of great help so far. Many of the problems I have encountered have been solved by reading different threads. Now I hope someone can help point me in the right direction with my current problem. I am trying to simulate pressurization of a gas pipeline. This involves high speed gas flow through an orifice. The geometry looks something like this:  The input pressure is 235 bar, and the gas temperature is 260 K. Due to the high pressure, very high flowrates occur. I am interested in the temperature distribution in the pipe material. If the temperature drops below a certain limit, the material can become brittle and fail at much lower stresses than normal. I have tried to use chtMultiRegionFoam, and I have managed to create a mesh with one fluid and one solid region. However, it has come to my attention that this solver might not be appropriate for the problem. As far as I have understood, even though it is a compressible solver, it assumes that rho is not a function of pressure, only of temperature. One possible solution I can think of is replacing the fluid solver in chtMultiRegionFoam with rhoCentralFoam or sonicFoam. However, I don’t think my programming skills is sufficient to do something like that. I have tried to search the forum to see if something like this has been done, but I was unable to find anything. I am wondering if it is possible to solve the fluid and pipe regions with different solvers (e.g. rhoCentralFoam and laplacianFoam), and somehow couple these, without creating a new solver? Maybe this is impossible, but any help would be appreciated! Best Regards Jakob |
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November 10, 2016, 12:06
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#2 |
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New Member
Alaa Bejaoui
Join Date: Oct 2016
Posts: 2
Rep Power: 0 |
Hello Jakob,
I have exactly the same Problem. Did you find a solution to your problem? I’dbeverythankful Best Regardsfrom Germany |
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December 29, 2016, 04:31
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#3 |
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Member
Join Date: Sep 2016
Posts: 63
Rep Power: 9 |
Dear Jakob,
I am pretty new in OpenFOAM, but if the perfectGas is chosen for the equation of state, is the density still pressure independent? Your experience would be very helpful for me. Thank you very much in advance! Sitajeje |
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December 29, 2016, 11:34
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#4 |
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New Member
Dawid Gacek
Join Date: Nov 2015
Location: Poland
Posts: 4
Rep Power: 10 |
Hello everyone!
@sitajeje - If you chose perfectGas, density is dependent of pressure and temperature. Here you can read more about that http://cfd.direct/openfoam/user-guide/thermophysical/ |
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May 18, 2021, 05:17
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#5 |
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New Member
Alosha Lovett
Join Date: Apr 2021
Posts: 4
Rep Power: 5 |
Hi Jakob,
I am doing something very similar however have approached it using sonicFoam. Did you ever manage to progress at all? I am a little stuck on how to implement appropriate heat transfer between my gas and bounding geometry. Thanks, Alex. |
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August 30, 2021, 12:40
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Tabulated thermophysical properties
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#6 |
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New Member
Joao Coelho
Join Date: Jun 2021
Posts: 23
Rep Power: 4 |
For future reference, the new OpenFOAM 9 allows any option for thermophysical properties, which do not limit us in what choice to use for each property.
I was trying to simulate the flow of cryogenic fuel inside a pipe, considering all thermodynamic properties changes. Being so, I was able to use tabulated properties for every property of interest. transport tabulated; thermo hTabulated; equationOfState rhoTabulated; thermodynamics { Hf 0; Sf 0; Hs { low (Plow Tlow); high (Phigh Thigh); values Np Nt ( ( ... ... ... ...) // for Plow, Nt values of Hs, For Nt uniform distributed values of T between Tlow and Thigh . . . //repeat Np times (for Np uniform distributed values of P between Plow and Phigh) . . . ( ... ... ... ...) // for Phigh, Nt values of Hs, For Nt uniform distributed values of T between Tlow and Thigh ); } .... Repeat table for Cp and Cv } transport { ... Repeat table for mu and kappa } equationOfState { ... Repeat table for rho } You can do all this by retrieving data from CoolProp or REFPROP for example. Nevertheless, I had some problems at the beginning of the run using this setup. It turned out it was a consequence of fast changes in the properties in the first time steps. I advise you to start with constant properties (rho, Cp, etc) until you reach at least a physical solution and then upgrade the solution with these changes. The OF page for these models (tabulated, hTabulated and rhoTabulated) did not mention the use of the table in this format. I realise it was like that looking at the source code. I believe they forgot to update their description. Hope this can help anyone trying to use these features in the future. Disclaimer: I am not an expert in CFD, neither in OpenFOAM. I simply tried to do this by trial and error. If you have any questions, feel free to post them here, but the most probable thing is I won't know how to answer if I did not have the same problem. But leave it here anyway, more knowledgeable people may help you. P.S. - I had run this with buoyantPimpleFoam/chtMultiRegion (which requires psiThermo). Recently, I tried using the same feature for rhoCentralFoam (which requires rhoThermo) but it does not work, and it said I needed to use pengRobinson or perfectGas for EoS. After some research, I found this in the commit description: The thermophysical property package is constructed automatically from the etc/codeTemplates/dynamicCode files for the corresponding base thermo type (e.g. fluidThermo), currently these are provided only for fluidThermo but the others will be added shortly. https://github.com/OpenFOAM/OpenFOAM...5cfb4b529bb087 I guess it was not added yet for rhoThermo. Last edited by jcoelho5; August 31, 2021 at 07:34. Reason: new info |
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January 21, 2022, 06:26
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#7 |
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Member
Stanley John
Join Date: Sep 2018
Posts: 79
Rep Power: 7 |
Can yo kindly post your thermophysical file?
It am still bit unsure. |
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January 21, 2022, 09:50
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#8 |
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New Member
Joao Coelho
Join Date: Jun 2021
Posts: 23
Rep Power: 4 |
thermoType
{ type heRhoThermo; mixture pureMixture; transport tabulated; thermo hTabulated; equationOfState rhoTabulated; specie specie; energy sensibleEnthalpy; } mixture { specie { molWeight 16.22239; } #include "thermoProp_tables_FUEL" } // ************************************************** *********************** // in another file (constant/thermoProp_tables_FUEL), I have the following: (changing linearly from 50 bar to 100 bar; 75K to 925K) HTML Code:
thermodynamics
{
Hf 0;
Sf 0;
Hs
{
low (5.000e+06 75.0);
high (1.000e+07 925.0);
values
11 18
(
(-1.178803e+05 5.104859e+04 2.422008e+05 6.487439e+05 7.939995e+05 9.227508e+05 1.051353e+06 1.184809e+06 1.328738e+06 1.477549e+06 1.634881e+06 1.800852e+06 1.975394e+06 2.158334e+06 2.349433e+06 2.548414e+06 2.754973e+06 2.968791e+06 )
(-1.170362e+05 5.171680e+04 2.413779e+05 6.356783e+05 7.875740e+05 9.184711e+05 1.048230e+06 1.182433e+06 1.326888e+06 1.476098e+06 1.633741e+06 1.799962e+06 1.974708e+06 2.157819e+06 2.349063e+06 2.548168e+06 2.754834e+06 2.968747e+06 )
(-1.161919e+05 5.238880e+04 2.406817e+05 6.218159e+05 7.810957e+05 9.142002e+05 1.045127e+06 1.180078e+06 1.325056e+06 1.474663e+06 1.632616e+06 1.799084e+06 1.974033e+06 2.157313e+06 2.348701e+06 2.547929e+06 2.754702e+06 2.968709e+06 )
(-1.153474e+05 5.306449e+04 2.400937e+05 6.071368e+05 7.745729e+05 9.099414e+05 1.042045e+06 1.177743e+06 1.323243e+06 1.473245e+06 1.631504e+06 1.798218e+06 1.973369e+06 2.156818e+06 2.348348e+06 2.547698e+06 2.754577e+06 2.968676e+06 )
(-1.145027e+05 5.374375e+04 2.395995e+05 5.916930e+05 7.680153e+05 9.056980e+05 1.038984e+06 1.175429e+06 1.321448e+06 1.471843e+06 1.630407e+06 1.797365e+06 1.972716e+06 2.156331e+06 2.348003e+06 2.547474e+06 2.754458e+06 2.968649e+06 )
(-1.136579e+05 5.442646e+04 2.391877e+05 5.756641e+05 7.614343e+05 9.014736e+05 1.035947e+06 1.173138e+06 1.319672e+06 1.470458e+06 1.629325e+06 1.796525e+06 1.972074e+06 2.155854e+06 2.347666e+06 2.547258e+06 2.754346e+06 2.968629e+06 )
(-1.128129e+05 5.511252e+04 2.388487e+05 5.594160e+05 7.548431e+05 8.972718e+05 1.032936e+06 1.170869e+06 1.317916e+06 1.469090e+06 1.628257e+06 1.795697e+06 1.971443e+06 2.155387e+06 2.347338e+06 2.547049e+06 2.754241e+06 2.968614e+06 )
(-1.119677e+05 5.580184e+04 2.385747e+05 5.435082e+05 7.482566e+05 8.930967e+05 1.029950e+06 1.168623e+06 1.316180e+06 1.467739e+06 1.627204e+06 1.794882e+06 1.970822e+06 2.154930e+06 2.347018e+06 2.546847e+06 2.754142e+06 2.968604e+06 )
(-1.111224e+05 5.649432e+04 2.383590e+05 5.285828e+05 7.416911e+05 8.889520e+05 1.026993e+06 1.166402e+06 1.314464e+06 1.466405e+06 1.626165e+06 1.794079e+06 1.970213e+06 2.154481e+06 2.346706e+06 2.546653e+06 2.754049e+06 2.968601e+06 )
(-1.102770e+05 5.718987e+04 2.381960e+05 5.151530e+05 7.351646e+05 8.848417e+05 1.024065e+06 1.164204e+06 1.312769e+06 1.465088e+06 1.625141e+06 1.793289e+06 1.969615e+06 2.154043e+06 2.346403e+06 2.546466e+06 2.753963e+06 2.968603e+06 )
(-1.094314e+05 5.788839e+04 2.380811e+05 5.034469e+05 7.286961e+05 8.807701e+05 1.021168e+06 1.162032e+06 1.311094e+06 1.463789e+06 1.624132e+06 1.792512e+06 1.969027e+06 2.153614e+06 2.346108e+06 2.546286e+06 2.753884e+06 2.968611e+06 )
);
}
Cp
{
low (5.000e+06 75.0);
high (1.000e+07 925.0);
values
11 18
(
(3.363368e+03 3.500509e+03 4.680558e+03 3.432670e+03 2.642175e+03 2.548970e+03 2.610251e+03 2.734956e+03 2.893184e+03 3.060625e+03 3.233022e+03 3.405569e+03 3.575525e+03 3.741261e+03 3.901774e+03 4.056434e+03 4.204853e+03 4.346815e+03 )
(3.362161e+03 3.493151e+03 4.571544e+03 3.733175e+03 2.704999e+03 2.578750e+03 2.628339e+03 2.747325e+03 2.902316e+03 3.067615e+03 3.238557e+03 3.410064e+03 3.579248e+03 3.744396e+03 3.904448e+03 4.058741e+03 4.206862e+03 4.348580e+03 )
(3.360974e+03 3.485994e+03 4.477441e+03 4.092451e+03 2.770596e+03 2.608976e+03 2.646494e+03 2.759675e+03 2.911413e+03 3.074564e+03 3.244054e+03 3.414526e+03 3.582944e+03 3.747506e+03 3.907101e+03 4.061029e+03 4.208856e+03 4.350332e+03 )
(3.359806e+03 3.479030e+03 4.395113e+03 4.516157e+03 2.838809e+03 2.639591e+03 2.664695e+03 2.771996e+03 2.920470e+03 3.081471e+03 3.249512e+03 3.418954e+03 3.586610e+03 3.750591e+03 3.909733e+03 4.063300e+03 4.210834e+03 4.352069e+03 )
(3.358656e+03 3.472251e+03 4.322282e+03 4.999728e+03 2.909405e+03 2.670531e+03 2.682920e+03 2.784277e+03 2.929482e+03 3.088332e+03 3.254930e+03 3.423348e+03 3.590247e+03 3.753652e+03 3.912343e+03 4.065552e+03 4.212796e+03 4.353794e+03 )
(3.357525e+03 3.465649e+03 4.257248e+03 5.516967e+03 2.982058e+03 2.701726e+03 2.701143e+03 2.796509e+03 2.938444e+03 3.095146e+03 3.260307e+03 3.427706e+03 3.593854e+03 3.756687e+03 3.914932e+03 4.067786e+03 4.214743e+03 4.355504e+03 )
(3.356412e+03 3.459218e+03 4.198709e+03 6.009435e+03 3.056345e+03 2.733097e+03 2.719340e+03 2.808683e+03 2.947351e+03 3.101910e+03 3.265641e+03 3.432028e+03 3.597431e+03 3.759697e+03 3.917500e+03 4.070001e+03 4.216673e+03 4.357201e+03 )
(3.355317e+03 3.452949e+03 4.145653e+03 6.393163e+03 3.131741e+03 2.764560e+03 2.737486e+03 2.820787e+03 2.956198e+03 3.108622e+03 3.270931e+03 3.436314e+03 3.600977e+03 3.762681e+03 3.920046e+03 4.072199e+03 4.218588e+03 4.358885e+03 )
(3.354240e+03 3.446838e+03 4.097274e+03 6.597493e+03 3.207623e+03 2.796026e+03 2.755554e+03 2.832812e+03 2.964980e+03 3.115279e+03 3.276176e+03 3.440563e+03 3.604493e+03 3.765640e+03 3.922570e+03 4.074378e+03 4.220488e+03 4.360554e+03 )
(3.353180e+03 3.440877e+03 4.052926e+03 6.611357e+03 3.283271e+03 2.827400e+03 2.773518e+03 2.844748e+03 2.973691e+03 3.121878e+03 3.281374e+03 3.444775e+03 3.607978e+03 3.768572e+03 3.925073e+03 4.076538e+03 4.222371e+03 4.362211e+03 )
(3.352138e+03 3.435061e+03 4.012081e+03 6.483608e+03 3.357892e+03 2.858585e+03 2.791352e+03 2.856585e+03 2.982327e+03 3.128419e+03 3.286526e+03 3.448948e+03 3.611431e+03 3.771479e+03 3.927554e+03 4.078680e+03 4.224240e+03 4.363854e+03 )
);
}
Cv
{
low (5.000e+06 75.0);
high (1.000e+07 925.0);
values
11 18
(
(2.337519e+03 2.005374e+03 1.880687e+03 1.760242e+03 1.722873e+03 1.809590e+03 1.949279e+03 2.116728e+03 2.298235e+03 2.483265e+03 2.667948e+03 2.849435e+03 3.026106e+03 3.197016e+03 3.361599e+03 3.519517e+03 3.670584e+03 3.814727e+03 )
(2.338665e+03 2.006754e+03 1.877775e+03 1.784391e+03 1.730230e+03 1.813340e+03 1.951619e+03 2.118341e+03 2.299420e+03 2.484160e+03 2.668640e+03 2.849980e+03 3.026540e+03 3.197365e+03 3.361881e+03 3.519745e+03 3.670768e+03 3.814875e+03 )
(2.339805e+03 2.008129e+03 1.875521e+03 1.809042e+03 1.737548e+03 1.817046e+03 1.953930e+03 2.119936e+03 2.300593e+03 2.485047e+03 2.669328e+03 2.850523e+03 3.026974e+03 3.197714e+03 3.362163e+03 3.519973e+03 3.670953e+03 3.815024e+03 )
(2.340938e+03 2.009497e+03 1.873790e+03 1.833482e+03 1.744795e+03 1.820704e+03 1.956210e+03 2.121511e+03 2.301755e+03 2.485927e+03 2.670012e+03 2.851063e+03 3.027406e+03 3.198062e+03 3.362445e+03 3.520202e+03 3.671138e+03 3.815173e+03 )
(2.342064e+03 2.010860e+03 1.872481e+03 1.856547e+03 1.751937e+03 1.824307e+03 1.958459e+03 2.123068e+03 2.302905e+03 2.486800e+03 2.670691e+03 2.851600e+03 3.027836e+03 3.198409e+03 3.362726e+03 3.520431e+03 3.671324e+03 3.815323e+03 )
(2.343184e+03 2.012217e+03 1.871518e+03 1.876574e+03 1.758939e+03 1.827851e+03 1.960675e+03 2.124606e+03 2.304045e+03 2.487666e+03 2.671366e+03 2.852135e+03 3.028265e+03 3.198756e+03 3.363008e+03 3.520660e+03 3.671510e+03 3.815473e+03 )
(2.344297e+03 2.013568e+03 1.870842e+03 1.891655e+03 1.765763e+03 1.831331e+03 1.962859e+03 2.126125e+03 2.305173e+03 2.488526e+03 2.672037e+03 2.852668e+03 3.028693e+03 3.199102e+03 3.363289e+03 3.520889e+03 3.671696e+03 3.815625e+03 )
(2.345404e+03 2.014912e+03 1.870406e+03 1.900366e+03 1.772371e+03 1.834743e+03 1.965008e+03 2.127625e+03 2.306290e+03 2.489378e+03 2.672704e+03 2.853198e+03 3.029120e+03 3.199448e+03 3.363571e+03 3.521118e+03 3.671883e+03 3.815776e+03 )
(2.346504e+03 2.016251e+03 1.870172e+03 1.902632e+03 1.778724e+03 1.838081e+03 1.967123e+03 2.129105e+03 2.307395e+03 2.490224e+03 2.673367e+03 2.853726e+03 3.029545e+03 3.199793e+03 3.363852e+03 3.521348e+03 3.672071e+03 3.815929e+03 )
(2.347599e+03 2.017583e+03 1.870110e+03 1.899848e+03 1.784788e+03 1.841343e+03 1.969203e+03 2.130566e+03 2.308489e+03 2.491063e+03 2.674026e+03 2.854252e+03 3.029969e+03 3.200138e+03 3.364134e+03 3.521578e+03 3.672259e+03 3.816082e+03 )
(2.348687e+03 2.018909e+03 1.870194e+03 1.894030e+03 1.790528e+03 1.844523e+03 1.971246e+03 2.132008e+03 2.309572e+03 2.491896e+03 2.674681e+03 2.854776e+03 3.030392e+03 3.200482e+03 3.364415e+03 3.521809e+03 3.672447e+03 3.816236e+03 )
);
}
}
transport
{
mu
{
low (5.000e+06 75.0);
high (1.000e+07 925.0);
values
11 18
(
(4.581839e-04 9.894276e-05 4.098806e-05 1.037836e-05 1.148123e-05 1.286222e-05 1.424161e-05 1.558284e-05 1.688270e-05 1.813810e-05 1.935452e-05 2.053499e-05 2.168239e-05 2.279934e-05 2.388818e-05 2.495100e-05 2.598965e-05 2.700579e-05 )
(4.610169e-04 9.950840e-05 4.171352e-05 1.076275e-05 1.164671e-05 1.297667e-05 1.433268e-05 1.566000e-05 1.695053e-05 1.819876e-05 1.940961e-05 2.058557e-05 2.172921e-05 2.284297e-05 2.392907e-05 2.498949e-05 2.602602e-05 2.704027e-05 )
(4.638521e-04 1.000730e-04 4.240857e-05 1.121877e-05 1.182464e-05 1.309640e-05 1.442668e-05 1.573901e-05 1.701969e-05 1.826038e-05 1.946542e-05 2.063671e-05 2.177649e-05 2.288698e-05 2.397027e-05 2.502824e-05 2.606261e-05 2.707494e-05 )
(4.666897e-04 1.006367e-04 4.307752e-05 1.175900e-05 1.201539e-05 1.322144e-05 1.452360e-05 1.581987e-05 1.709017e-05 1.832294e-05 1.952194e-05 2.068840e-05 2.182420e-05 2.293135e-05 2.401177e-05 2.506724e-05 2.609942e-05 2.710980e-05 )
(4.695298e-04 1.011994e-04 4.372380e-05 1.239602e-05 1.221930e-05 1.335181e-05 1.462343e-05 1.590255e-05 1.716196e-05 1.838645e-05 1.957916e-05 2.074064e-05 2.187236e-05 2.297608e-05 2.405357e-05 2.510650e-05 2.613645e-05 2.714486e-05 )
(4.723725e-04 1.017611e-04 4.435016e-05 1.313933e-05 1.243665e-05 1.348751e-05 1.472615e-05 1.598705e-05 1.723505e-05 1.845087e-05 1.963707e-05 2.079342e-05 2.192095e-05 2.302116e-05 2.409566e-05 2.514601e-05 2.617370e-05 2.718010e-05 )
(4.752179e-04 1.023219e-04 4.495888e-05 1.399022e-05 1.266762e-05 1.362854e-05 1.483173e-05 1.607334e-05 1.730942e-05 1.851622e-05 1.969568e-05 2.084673e-05 2.196997e-05 2.306660e-05 2.413805e-05 2.518577e-05 2.621116e-05 2.721553e-05 )
(4.780661e-04 1.028818e-04 4.555186e-05 1.493606e-05 1.291232e-05 1.377487e-05 1.494016e-05 1.616140e-05 1.738507e-05 1.858248e-05 1.975497e-05 2.090058e-05 2.201941e-05 2.311238e-05 2.418073e-05 2.522578e-05 2.624883e-05 2.725114e-05 )
(4.809172e-04 1.034408e-04 4.613072e-05 1.594826e-05 1.317078e-05 1.392647e-05 1.505140e-05 1.625122e-05 1.746197e-05 1.864963e-05 1.981493e-05 2.095494e-05 2.206927e-05 2.315850e-05 2.422369e-05 2.526602e-05 2.628671e-05 2.728693e-05 )
(4.837714e-04 1.039989e-04 4.669681e-05 1.698867e-05 1.344287e-05 1.408329e-05 1.516542e-05 1.634277e-05 1.754013e-05 1.871767e-05 1.987555e-05 2.100983e-05 2.211954e-05 2.320496e-05 2.426694e-05 2.530651e-05 2.632479e-05 2.732290e-05 )
(4.866288e-04 1.045561e-04 4.725135e-05 1.802188e-05 1.372837e-05 1.424527e-05 1.528219e-05 1.643602e-05 1.761952e-05 1.878658e-05 1.993683e-05 2.106522e-05 2.217022e-05 2.325176e-05 2.431046e-05 2.534723e-05 2.636308e-05 2.735905e-05 )
);
}
kappa
{
low (5.000e+06 75.0);
high (1.000e+07 925.0);
values
11 18
(
(2.303868e-01 1.716501e-01 1.037495e-01 3.273543e-02 3.567220e-02 4.129326e-02 4.843069e-02 5.659053e-02 6.554126e-02 7.510357e-02 8.514228e-02 9.555263e-02 1.062521e-01 1.171734e-01 1.282594e-01 1.394611e-01 1.507356e-01 1.620455e-01 )
(2.307379e-01 1.722519e-01 1.051569e-01 3.442327e-02 3.616692e-02 4.172952e-02 4.876216e-02 5.686126e-02 6.577181e-02 7.530486e-02 8.532135e-02 9.571415e-02 1.063994e-01 1.173088e-01 1.283849e-01 1.395780e-01 1.508450e-01 1.621484e-01 )
(2.310882e-01 1.728494e-01 1.064978e-01 3.642646e-02 3.686556e-02 4.218282e-02 4.910239e-02 5.713733e-02 6.600601e-02 7.550876e-02 8.550237e-02 9.587718e-02 1.065479e-01 1.174452e-01 1.285111e-01 1.396955e-01 1.509550e-01 1.622518e-01 )
(2.314378e-01 1.734427e-01 1.077814e-01 3.879661e-02 3.760880e-02 4.265350e-02 4.945143e-02 5.741875e-02 6.624384e-02 7.571525e-02 8.568532e-02 9.604172e-02 1.066975e-01 1.175826e-01 1.286382e-01 1.398138e-01 1.510656e-01 1.623557e-01 )
(2.317866e-01 1.740319e-01 1.090149e-01 4.156309e-02 3.839834e-02 4.314178e-02 4.980929e-02 5.770551e-02 6.648530e-02 7.592432e-02 8.587020e-02 9.620775e-02 1.068484e-01 1.177210e-01 1.287660e-01 1.399327e-01 1.511768e-01 1.624601e-01 )
(2.321347e-01 1.746172e-01 1.102039e-01 4.470003e-02 3.923538e-02 4.364783e-02 5.017597e-02 5.799757e-02 6.673036e-02 7.613595e-02 8.605699e-02 9.637525e-02 1.070004e-01 1.178603e-01 1.288947e-01 1.400522e-01 1.512885e-01 1.625650e-01 )
(2.324821e-01 1.751985e-01 1.113532e-01 4.809115e-02 4.012053e-02 4.417168e-02 5.055143e-02 5.829489e-02 6.697898e-02 7.635010e-02 8.624567e-02 9.654422e-02 1.071536e-01 1.180006e-01 1.290241e-01 1.401725e-01 1.514008e-01 1.626703e-01 )
(2.328288e-01 1.757761e-01 1.124670e-01 5.152980e-02 5.722869e-02 4.471324e-02 5.093562e-02 5.859744e-02 6.723114e-02 7.656677e-02 8.643622e-02 9.671464e-02 1.073080e-01 1.181418e-01 1.291544e-01 1.402934e-01 1.515137e-01 1.627762e-01 )
(2.331747e-01 1.763500e-01 1.135485e-01 5.479075e-02 4.203361e-02 4.527229e-02 5.132844e-02 5.890516e-02 6.748680e-02 7.678591e-02 8.662862e-02 9.688648e-02 1.074635e-01 1.182839e-01 1.292853e-01 1.404149e-01 1.516271e-01 1.628826e-01 )
(2.335200e-01 1.769204e-01 1.146006e-01 5.773374e-02 4.305846e-02 4.584847e-02 5.172977e-02 5.921797e-02 6.774591e-02 7.700750e-02 8.682285e-02 9.705975e-02 1.076201e-01 1.184270e-01 1.294171e-01 1.405371e-01 1.517411e-01 1.629894e-01 )
(2.338645e-01 1.774872e-01 1.156257e-01 6.033915e-02 4.412509e-02 4.644127e-02 5.213946e-02 5.953581e-02 6.800842e-02 7.723150e-02 8.701887e-02 9.723440e-02 1.077778e-01 1.185709e-01 1.295496e-01 1.406599e-01 1.518556e-01 1.630967e-01 )
);
}
}
equationOfState
{
rho
{
low (5.000e+06 75.0);
high (1.000e+07 925.0);
values
11 18
(
(4.769768e+02 4.103729e+02 3.160783e+02 5.848828e+01 4.018529e+01 3.192277e+01 2.682432e+01 2.326460e+01 2.062766e+01 1.853533e+01 1.684881e+01 1.545587e+01 1.428342e+01 1.328143e+01 1.241429e+01 1.165589e+01 1.098657e+01 1.039123e+01 )
(4.772255e+02 4.109196e+02 3.184894e+02 6.706308e+01 4.477428e+01 3.531370e+01 2.958190e+01 2.561472e+01 2.269333e+01 2.037882e+01 1.851737e+01 1.698225e+01 1.569149e+01 1.458921e+01 1.363581e+01 1.280231e+01 1.206693e+01 1.141299e+01 )
(4.774733e+02 4.114603e+02 3.207435e+02 7.646878e+01 4.947280e+01 3.873684e+01 3.234989e+01 2.796698e+01 2.475814e+01 2.221956e+01 2.018234e+01 1.850474e+01 1.709560e+01 1.589312e+01 1.485361e+01 1.394518e+01 1.314394e+01 1.243158e+01 )
(4.777202e+02 4.119950e+02 3.228635e+02 8.681263e+01 5.427992e+01 4.219065e+01 3.512735e+01 3.032079e+01 2.682173e+01 2.405731e+01 2.184359e+01 2.002322e+01 1.849570e+01 1.719311e+01 1.606764e+01 1.508448e+01 1.421757e+01 1.344700e+01 )
(4.779661e+02 4.125239e+02 3.248671e+02 9.817165e+01 5.919342e+01 4.567335e+01 3.791325e+01 3.267556e+01 2.888373e+01 2.589185e+01 2.350095e+01 2.153762e+01 1.989171e+01 1.848915e+01 1.727790e+01 1.622020e+01 1.528782e+01 1.445923e+01 )
(4.782111e+02 4.130472e+02 3.267686e+02 1.105394e+02 6.420969e+01 4.918296e+01 4.070653e+01 3.503070e+01 3.094377e+01 2.772294e+01 2.515429e+01 2.304783e+01 2.128359e+01 1.978119e+01 1.848436e+01 1.735233e+01 1.635469e+01 1.546829e+01 )
(4.784552e+02 4.135650e+02 3.285797e+02 1.237496e+02 6.932350e+01 5.271729e+01 4.350611e+01 3.738559e+01 3.300146e+01 2.955035e+01 2.680345e+01 2.455376e+01 2.267126e+01 2.106919e+01 1.968699e+01 1.848084e+01 1.741817e+01 1.647416e+01 )
(4.786984e+02 4.140775e+02 3.303102e+02 1.374162e+02 7.452788e+01 5.627395e+01 4.631083e+01 3.973962e+01 3.505643e+01 3.137384e+01 2.844829e+01 2.605532e+01 2.405468e+01 2.235313e+01 2.088577e+01 1.960574e+01 1.847825e+01 1.747685e+01 )
(4.789408e+02 4.145848e+02 3.319681e+02 1.509713e+02 7.981396e+01 5.985034e+01 4.911954e+01 4.209218e+01 3.710827e+01 3.319319e+01 3.008867e+01 2.755241e+01 2.543378e+01 2.363297e+01 2.208068e+01 2.072700e+01 1.953493e+01 1.847635e+01 )
(4.791822e+02 4.150870e+02 3.335603e+02 1.638402e+02 8.517098e+01 6.344365e+01 5.193102e+01 4.444263e+01 3.915661e+01 3.500816e+01 3.172445e+01 2.904496e+01 2.680851e+01 2.490866e+01 2.327169e+01 2.184462e+01 2.058820e+01 1.947266e+01 )
(4.794228e+02 4.155842e+02 3.350927e+02 1.756357e+02 9.058626e+01 6.705092e+01 5.474404e+01 4.679036e+01 4.120105e+01 3.681853e+01 3.335549e+01 3.053287e+01 2.817881e+01 2.618018e+01 2.445880e+01 2.295858e+01 2.163805e+01 2.046579e+01 )
);
}
}
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February 8, 2022, 02:43
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#9 | |
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New Member
lee wei
Join Date: Dec 2020
Posts: 11
Rep Power: 5 |
Hi, Joao Coelho,
Thanks for your post, but I want to know what Quote:
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February 8, 2022, 07:48
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#10 | |
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New Member
Joao Coelho
Join Date: Jun 2021
Posts: 23
Rep Power: 4 |
Quote:
For simplicity, let's assume it was "values 3 2" ----- | T1 | T2 | ----------------------- p1 | v(1,1) | v(1,2) | ----------------------- p2 | v(2,1) | v(2,2) | ----------------------- p3 | v(3,1) | v(3,2) | ----------------------- v(1,1) is the property (for example Cp) @ pressure p1 and Temperature T1 ... v(3,2) is the property (for example Cp) @ pressure p3 and Temperature T2 So, you have 3 values of P, varying from Phigh and Plow (100bar and 50bar in the example I gave --- would result in p1=50, p2=75, p3=100 bar using the 3x2 table), and 2 values of T between Thigh and Tlow (925K and 75K in the example I gave; would result in T1=75K and T2=925K). Basically, you decide how "refined" you want your table. It depends on your particular case. |
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February 8, 2022, 08:05
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#11 |
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New Member
lee wei
Join Date: Dec 2020
Posts: 11
Rep Power: 5 |
Hi, Joao,
I got it, your reply is quite clear and really helpful, thanks. lee |
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February 8, 2022, 09:22
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#12 | ||
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New Member
lee wei
Join Date: Dec 2020
Posts: 11
Rep Power: 5 |
Hi, Joao,
Sorry to bother, but I have another related question, you mentioned in the former post that you had used "rhoTabulated" with chtMultiRegionFoam, actually I want to use the "icoTabulated" with chtMultiRegionFoam, in which rho is only dependent with temperature. I want to know have you try the "icoTabulated" method as well? my simulation stucked by the error below when I set icoTabulated method into the thermalProperties file. Quote:
Quote:
Lee |
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June 14, 2022, 04:37
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#13 | |
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New Member
Joao Coelho
Join Date: Jun 2021
Posts: 23
Rep Power: 4 |
Quote:
Hope it helps. |
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October 25, 2022, 15:56
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#14 |
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New Member
Thomas M
Join Date: Aug 2018
Posts: 20
Rep Power: 7 |
Also looking for something like chtMultiRegionSonicFoam.
Sonic conjugate heat transfer model |
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March 17, 2023, 07:53
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#15 | |
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New Member
Sreehari Perumanath
Join Date: Jun 2022
Posts: 28
Rep Power: 3 |
Quote:
Could you please tell me how you evaluated Hs for your system? Also, do you know how to evaluate Es of a system? I have a system for which I know Cv as a function of p,T, and I'd like to use eTabulated for my "thermo". But I don't know how to specify Es(p,T) within "thermodynamics". Please share if you have any insights. Many thanks, SP |
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2Likes
rimitiveEntry::dict() const
Linear Mode
