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#1 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
I have a problem with DNS, I want a guide, the DNSFoam
my problem is a water injector, with a torpedo |
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#2 |
Senior Member
Mahdi Hosseinali
Join Date: Apr 2009
Location: NB, Canada
Posts: 273
Rep Power: 19 ![]() |
Can you tell us what is your problem?
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#3 |
Senior Member
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I think we have to guess, otherwise would be too easy!
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#4 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
omar@omar-laptop:~/Bureau/essaiDNS$ boxTurb
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.0.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 2.0.1-51f1de99a4bc Exec : boxTurb Date : Jun 14 2012 Time : 22:28:25 Host : omar-laptop PID : 2214 Case : /home/omar/Bureau/essaiDNS nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Disallowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh for time = 0 Reading field U Reading boxTurbDict --> FOAM FATAL ERROR: calculated number of cells is incorrect From function Kmesh::Kmesh(const fvMesh& mesh) in file Kmesh/Kmesh.C at line 84. FOAM aborting #0 Foam::error: ![]() #1 Foam::error::abort() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" #2 Foam::Kmesh::Kmesh(Foam::fvMesh const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/librandomProcesses.so" #3 in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/boxTurb" #4 __libc_start_main in "/lib/libc.so.6" #5 in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/boxTurb" Abandon |
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#5 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
I have no idea, for dnsFoam, when I my problem, does not calculate the solever
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#6 |
Senior Member
Bernhard
Join Date: Sep 2009
Location: Delft
Posts: 790
Rep Power: 22 ![]() |
I have no experience with dnsFoam, but maybe there is something wrong with your mesh? Can you share the output of 'checkMesh'?
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#7 |
Senior Member
Mahdi Hosseinali
Join Date: Apr 2009
Location: NB, Canada
Posts: 273
Rep Power: 19 ![]() |
you are trying to use boxTurb with your case? As you can see from its name that is only for a box, it makes initial condition for a homogeneous turbulence box, in your case you should only think of inlet condition, turbulence inside will be made itself.
btw DNSFoam adds forced turbulence during the simulation which you don't need either!!! just take another solver and with a fine mesh you are doing dns |
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#8 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
omar@omar-laptop:~/Bureau/essaiDNS$ blockMesh
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.0.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 2.0.1-51f1de99a4bc Exec : blockMesh Date : Jun 16 2012 Time : 00:09:02 Host : omar-laptop PID : 2386 Case : /home/omar/Bureau/essaiDNS nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Disallowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Creating block mesh from "/home/omar/Bureau/essaiDNS/constant/polyMesh/blockMeshDict" Creating curved edges Creating topology blocks Creating topology patches Creating block mesh topology Check topology Basic statistics Number of internal faces : 28 Number of boundary faces : 40 Number of defined boundary faces : 40 Number of undefined boundary faces : 0 Checking patch -> block consistency Creating block offsets Creating merge list . Creating polyMesh from blockMesh Creating patches Creating cells Creating points with scale 0.01 Writing polyMesh ---------------- Mesh Information ---------------- boundingBox: (0 0 -0.05) (0.4 0.05 0.05) nPoints: 137781 nCells: 128000 nFaces: 393600 nInternalFaces: 374400 ---------------- Patches ---------------- patch 0 (start: 374400 size: 1600) name: inlet patch 1 (start: 376000 size: 1600) name: outlet patch 2 (start: 377600 size: 6400) name: upperWal patch 3 (start: 384000 size: 3200) name: lowerWall patch 4 (start: 387200 size: 3200) name: axeWall patch 5 (start: 390400 size: 3200) name: front End omar@omar-laptop:~/Bureau/essaiDNS$ |
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#9 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
mar@omar-laptop:~/Bureau/essaiDNS$ checkMesh
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.0.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 2.0.1-51f1de99a4bc Exec : checkMesh Date : Jun 16 2012 Time : 00:09:52 Host : omar-laptop PID : 2565 Case : /home/omar/Bureau/essaiDNS nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Disallowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 0 Time = 0 Mesh stats points: 137781 faces: 393600 internal faces: 374400 cells: 128000 boundary patches: 6 point zones: 0 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 128000 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 1600 1701 ok (non-closed singly connected) outlet 1600 1701 ok (non-closed singly connected) upperWal 6400 6561 ok (non-closed singly connected) lowerWall 3200 3321 ok (non-closed singly connected) axeWall 3200 3321 ok (non-closed singly connected) front 3200 3402 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (0 0 -0.05) (0.4 0.05 0.05) Mesh (non-empty, non-wedge) directions (1 1 1) Mesh (non-empty) directions (1 1 1) Boundary openness (-2.54409e-17 -6.19965e-15 1.35568e-17) OK. Max cell openness = 2.04348e-15 OK. Max aspect ratio = 118.807 OK. Minumum face area = 1.07985e-08. Maximum face area = 3.56404e-05. Face area magnitudes OK. Min volume = 6.23376e-11. Max volume = 3.84201e-08. Total volume = 0.00148204. Cell volumes OK. Mesh non-orthogonality Max: 22.4534 average: 4.15421 Non-orthogonality check OK. Face pyramids OK. Max skewness = 1.00178 OK. Mesh OK. End omar@omar-laptop:~/Bureau/essaiDNS$ ^C omar@omar-laptop:~/Bureau/essaiDNS$ |
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#10 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
omar@omar-laptop:~/Bureau/essaiDNS$ boxTurb
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.0.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 2.0.1-51f1de99a4bc Exec : boxTurb Date : Jun 16 2012 Time : 00:29:02 Host : omar-laptop PID : 2949 Case : /home/omar/Bureau/essaiDNS nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Disallowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh for time = 0 Reading field U Reading boxTurbDict --> FOAM FATAL ERROR: calculated number of cells is incorrect From function Kmesh::Kmesh(const fvMesh& mesh) in file Kmesh/Kmesh.C at line 84. FOAM aborting #0 Foam::error: ![]() #1 Foam::error::abort() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" #2 Foam::Kmesh::Kmesh(Foam::fvMesh const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/librandomProcesses.so" #3 in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/boxTurb" #4 __libc_start_main in "/lib/libc.so.6" #5 in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/boxTurb" Abandon omar@omar-laptop:~/Bureau/essaiDNS$ |
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#11 |
New Member
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 15 ![]() |
omar@omar-laptop:~/Bureau/essaiDNS$ dnsFoam
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.0.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 2.0.1-51f1de99a4bc Exec : dnsFoam Date : Jun 16 2012 Time : 00:30:09 Host : omar-laptop PID : 2960 Case : /home/omar/Bureau/essaiDNS nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Disallowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh, no clear-out for time = 0 Reading transportProperties Reading field p Reading field U Reading/calculating face flux field phi Reading turbulenceProperties --> FOAM FATAL ERROR: calculated number of cells is incorrect From function Kmesh::Kmesh(const fvMesh& mesh) in file Kmesh/Kmesh.C at line 84. FOAM aborting #0 Foam::error: ![]() #1 Foam::error::abort() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" #2 Foam::Kmesh::Kmesh(Foam::fvMesh const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/librandomProcesses.so" #3 in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/dnsFoam" #4 __libc_start_main in "/lib/libc.so.6" #5 in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/dnsFoam" Abandon omar@omar-laptop:~/Bureau/essaiDNS$ ^C omar@omar-laptop:~/Bureau/essaiDNS$ |
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#12 |
Senior Member
Mahdi Hosseinali
Join Date: Apr 2009
Location: NB, Canada
Posts: 273
Rep Power: 19 ![]() |
As you see it says calculating number of cells is incorrect, this is because it is using fft to energize the fluid in the fourier space which does not apply to your case. your grid number should be 2^n in any direction, even in that case you won't get a reasonable velocity field from this solver
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