|
[Sponsors] |
[snappyHexMesh] Saving cells in SHM 3D to 2D: Is my strategy silly or smart ;-)? |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
March 16, 2024, 09:06 |
Saving cells in SHM 3D to 2D: Is my strategy silly or smart ;-)?
|
#1 |
New Member
Join Date: Sep 2022
Posts: 3
Rep Power: 4 |
Hi foamers,
I want to make a 2D mesh with SHM. I can do this with extrudeMesh. the problem is, that first, a 3D mesh is generated which needs a lot of RAM and makes the whole process slow. So, I tried to define the refinement regions just at the patch, that I want to extrude. Eg. width of object = 0.1, but the refinement region would only go from 0 to 0.001. this saves a lot of cells and computation time. the problem is, that my extrudeMeshDict seems so stop working with this approach. If anyone could help me with that, I would be very glad. |
|
March 18, 2024, 03:36 |
|
#2 |
Senior Member
M
Join Date: Dec 2017
Posts: 698
Rep Power: 12 |
What error are you getting?
I used this very approach recently and it worked like a charm. |
|
March 23, 2024, 13:28 |
|
#3 |
New Member
Join Date: Sep 2022
Posts: 3
Rep Power: 4 |
thank you very much for your reply and encouragement. there isn't really an error message but just the extrudeMeshDict isn't working anymore. the mesh doesn't collapse. It has worked as long as the refinementRegions went over the whole depth of the mesh.
Here is the output of extrudeMesh: /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2306 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : _fbf00d6bf2-20230626 OPENFOAM=2306 version=v2306 Arch : "LSB;label=32;scalar=64" Exec : extrudeMesh Date : Mar 23 2024 Time : 18:15:18 Host : compile-infinix1 PID : 22396 I/O : uncollated Case : /afs/physnet.uni-hamburg.de/users/AU/nnordblo/openfoam/Cases/FmM13_22_extruded/FmM13_22 nProcs : 1 trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20) allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh for time = 0 Selecting extrudeModel plane Selected extrudeModel for linearNormal using coeffs { constructFrom patch; sourceCase "$FOAM_CASE"; sourcePatches ( back ); exposedPatchName front; extrudeModel plane; thickness 0.1; flipNormals false; mergeFaces false; } Extruding from patch using model plane Collapsing edges < 0.0001 of bounding box Extruding patches 1(back) on mesh "/afs/physnet.uni-hamburg.de/users/AU/nnordblo/openfoam/Cases/FmM13_22_extruded/FmM13_22" Create mesh for time = 0 Adding overall 0 processor patches. Mesh bounding box : (-0.14 -0.064 -0.099) (0.257 0.14 0.001) with span : (0.397 0.204 0.1) Merge distance : 1e-05 Collapsing edges < 1e-05 ... Uncollapsed edges = 0 / 3616338 Number of points : 1458540 Not visited : 0 Not collapsed : 1458540 Collapsed : 0 Collapsing 0 cells Writing mesh to "/afs/physnet.uni-hamburg.de/users/AU/nnordblo/openfoam/Cases/FmM13_22_extruded/FmM13_22/constant/region0" End |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[snappyHexMesh] Too many cells in undesired part, very less cells in desirable part | Ash Kot | OpenFOAM Meshing & Mesh Conversion | 3 | August 7, 2023 15:56 |
[snappyHexMesh] snappyHexMesh stuck when snap is turned on | yukuns | OpenFOAM Meshing & Mesh Conversion | 3 | February 2, 2021 14:05 |
[snappyHexMesh] sHM layer process keeps getting killed | MBttR | OpenFOAM Meshing & Mesh Conversion | 4 | August 15, 2016 04:21 |
[OpenFOAM.org] Compile OF 2.3 on Mac OS X .... the patch | gschaider | OpenFOAM Installation | 225 | August 25, 2015 20:43 |
physical boundary error!! | kris | Siemens | 2 | August 3, 2005 01:32 |