Thanks a lot, Blaise. Yes. As you said, I have to define a node set to find the edges we are interested in for Exodus II file.
On Sun, Sep 22, 2024 at 9:26 AM Blaise Bourdin <bour...@mcmaster.ca> wrote: > > > On Sep 21, 2024, at 9:54 AM, neil liu <liufi...@gmail.com> wrote: > > Caution: External email. > > Thanks a lot, David. That works. > Then I tried another example from Cubit. The script is defined as follows, > > reset > brick x 1 > mesh vol 1 > block 1 volume 1 > sideset 1 surface 1 > block 2 surface 1 #sides of these elements can now be referenced in a > sideset > block 2 element type quad > sideset 2 curve 1 > > Then the mesh was exported as a exodus file (attached), and imported into > Petsc. > Here, the code was stuck by the function, DMPlexCreateExodus(). > I think maybe this is due to block 1 is 3D while block 2 is 2D. > But this seems necessary to define an edge using sideset. > > > > That is corrrect. > As far as I understand, one of the few assumptions in dmplex is that > “cells” have the same topological dimension > Here sideset 1 and 2 have different dimensions. > As far as I remember, exodusII does not have “Edge sets”, so your best bet > would be to define a node set for curve 1. > > Regards, > Blaise > > > Thanks, > > Xiaodong > > On Fri, Sep 20, 2024 at 3:15 PM David Andrs <and...@gmail.com> wrote: > >> Before you export the mesh from Cubit, change the element type to >> something like QUAD4. PETSc does not automatically remap SHELL elements to >> QUADs. >> >> -- >> David >> >> On Fri, Sep 20, 2024 at 8:05 AM neil liu <liufi...@gmail.com> wrote: >> >>> Dear Petsc developers and users, >>> >>> I am trying to read an exodus II file from coreform cubit, but without >>> success, >>> Then I used petsc's built-in exodus file, >>> /share/petsc/datafiles/meshes/sevenside.exo. >>> This file can be read by petsc successfully. >>> >>> And I did a test. This file, sevenside.exo, is imported into coreform >>> Cubit, and then is saved as a new exodus file. This new exodus file can not >>> be read by petsc successfully. >>> >>> [0]PETSC ERROR: Invalid argument >>> [0]PETSC ERROR: Unrecognized element type SHELL >>> [0]PETSC ERROR: See >>> https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!behGY_YKaZKejR7vV7vkVTAHTWR_Y1UTNxgJ-4rMSCrvsMTFm_QsFVjhbC6HhjoPQ4ThPerrFQAqNC0N2WoY9A$ >>> >>> <https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!fcN-KL0rs3WRHNRfT47zioS4djjyXM7OCr32LT2olmZHm3X1NIk-WMdU9-UR3rNotQSpINEm8NrcMtWTCFqKEg$> >>> for >>> trouble shooting. >>> [0]PETSC ERROR: Petsc Release Version 3.21.1, Apr 26, 2024 >>> [0]PETSC ERROR: ./app on a arch-linux-c-opt named localhost.localdomain >>> by xiaodongliu Fri Sep 20 09:36:16 2024 >>> [0]PETSC ERROR: Configure options -download-mumps -download-scalapack >>> --with-cc=gcc --with-fc=gfortran --with-cxx=g++ --download-fblaslapack >>> --download-mpich --with-scalar-type=complex --download-triangle >>> --with-debugging=no --download-parmetis --download-metis -download-ptscotch >>> --download-bison --download-hdf5 >>> -download-mmg=/home/xiaodongliu/Documents/3rdPartyLib/d5c43d1bcefe598d51428f6a7fee10ec29478b79.tar.gz >>> --download-ctetgen --download-pragmatic --download-eigen >>> --download-netcdf=/home/xiaodongliu/Documents/3rdPartyLib/netcdf-c-4.9.2-p1.tar.gz >>> --download-zlib --download-pnetcdf --download-exodusii >>> [0]PETSC ERROR: #1 ExodusGetCellType_Internal() at >>> /home/xiaodongliu/Documents/petsc-with-docs-3.21.1/petsc-3.21.1/src/dm/impls/plex/plexexodusii.c:1470 >>> [0]PETSC ERROR: #2 DMPlexCreateExodus() at >>> /home/xiaodongliu/Documents/petsc-with-docs-3.21.1/petsc-3.21.1/src/dm/impls/plex/plexexodusii.c:1551 >>> [0]PETSC ERROR: #3 DMPlexCreateExodusFromFile() at >>> /home/xiaodongliu/Documents/petsc-with-docs-3.21.1/petsc-3.21.1/src/dm/impls/plex/plexexodusii.c:1390 >>> >>> Thanks a lot. >>> >>> Xiaodong >>> Compose: >>> Inquiry about reading an exodus II file from coreform Cubit >>> [image: Minimize][image: Pop-out][image: Close] >>> PETSc users list >>> >> <test.e> > > > — > Canada Research Chair in Mathematical and Computational Aspects of Solid > Mechanics (Tier 1) > Professor, Department of Mathematics & Statistics > Hamilton Hall room 409A, McMaster University > 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada > https://urldefense.us/v3/__https://www.math.mcmaster.ca/bourdin__;!!G_uCfscf7eWS!behGY_YKaZKejR7vV7vkVTAHTWR_Y1UTNxgJ-4rMSCrvsMTFm_QsFVjhbC6HhjoPQ4ThPerrFQAqNC3T_iAGGQ$ > | +1 (905) 525 9140 ext. 27243 > >
