|
[Sponsors] |
![]() |
![]() |
#1 |
Member
Sadegh Ebadi
Join Date: Apr 2015
Posts: 75
Rep Power: 11 ![]() |
Hello everybody
I want to simulate sandia Spray H heptane combustion via sprayFoam Please look at this: http://www.ca.sandia.gov/ecn/cvdata/...h/frameset.php First I simulated the nonreactive case with O2 set to zero. And after some difficulties I concluded that I should run my case in 3D form (because 2D wedge gave wrong results for LPL) in order to obtain right liquid penetration length (LPL) and vapor penetration length (VPL) so I used a 30 degree sector of a cylinder (the chamber in spray H is a cylinder 108*108 mm) after that I wanted to simulate the reactive case with O2 set to 21% but my case diverges and gives unusual temperatures sometimes it gets negative but most often it rises up to more than 6000 celsius degrees, that is out of Janaf thermo range. I hope I described everything clearly. Now can anyone help me to solve these problems and simulate spray H combustion case? |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Member
Arvind Jay
Join Date: Sep 2012
Posts: 96
Rep Power: 15 ![]() |
Try using the temperature limiters and it has helped me in the past.
Code:
/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 3.0.1 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "constant"; object fvOptions; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // temperatureLimit { type limitTemperature; active true; limitTemperatureCoeffs { selectionMode all; max 5000; //Tmax min 250.0; } }/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 3.0.1 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "constant"; object fvOptions; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // temperatureLimit { type limitTemperature; active true; limitTemperatureCoeffs { selectionMode all; max 5000; //Tmax min 250.0; } } -J |
|
![]() |
![]() |
![]() |
![]() |
#3 | |
Member
Sadegh Ebadi
Join Date: Apr 2015
Posts: 75
Rep Power: 11 ![]() |
Quote:
How should I do that? Should I set the min and max correspondence to that of thermo.dat file? My openFoam version is 4.1 does it have difference? |
||
![]() |
![]() |
![]() |
![]() |
#4 | |
Member
Sadegh Ebadi
Join Date: Apr 2015
Posts: 75
Rep Power: 11 ![]() |
Quote:
|
||
![]() |
![]() |
![]() |
![]() |
#5 |
Member
Arvind Jay
Join Date: Sep 2012
Posts: 96
Rep Power: 15 ![]() |
Could you provide additional details?
-J |
|
![]() |
![]() |
![]() |
Tags |
janafthermo, janafthermo error, spray flame, sprayfoam |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
[OpenFOAM.org] compile error in dynamicMesh and thermophysicalModels libraries | NickG | OpenFOAM Installation | 3 | December 30, 2019 00:21 |
[blockMesh] blockMesh with double grading. | spwater | OpenFOAM Meshing & Mesh Conversion | 92 | January 12, 2019 09:00 |
[swak4Foam] GroovyBC the dynamic cousin of funkySetFields that lives on the suburb of the mesh | gschaider | OpenFOAM Community Contributions | 300 | October 29, 2014 18:00 |
OpenFOAM without MPI | kokizzu | OpenFOAM Installation | 4 | May 26, 2014 09:17 |
DecomposePar links against liblamso0 with OpenMPI | jens_klostermann | OpenFOAM Bugs | 11 | June 28, 2007 17:51 |