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Problems with inputting ansys mesh(.cgns) to SU2 |
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May 31, 2022, 03:29 |
Problems with inputting ansys mesh(.cgns) to SU2
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#1 |
New Member
jim
Join Date: May 2022
Posts: 6
Rep Power: 4 |
Hello everyone,
I'm trying to use the mesh made in Ansys workbench(fluent) to work in the inv_naca0012 simulation which can be find in https://su2code.github.io/docs_v7/Quick-Start/ . I had have read the manuals and knew that SU2 can use mesh file type such as .cgns and .su2 , however when i tried to export the mesh(.cgns) from ansys and input it in the inv_naca0012.cfg the following issue occured, ------------------- Geometry Preprocessing ( Zone 0 ) ------------------- Reading the CGNS file: ansys_mesh_naca0012_2.cgns. WARNING: The CGNS file version (3.21) is old and may cause high memory usage issues, consider updating the file with the cgnsupdate tool. CGNS file contains 1 database(s). Database 1, BASE#1: cell dimension of 2, physical dimension of 3. 1 total zone(s). Zone 1, ansys_mesh_naca0012_2: 71616 total vertices, 71118 total elements. Loading CoordinateX values. Loading CoordinateY values. Number of connectivity sections is 3. Section SURFACE_BODY_1_1 contains 71118 elements of type Mixed. Section FARFIELD contains 941 elements of type Line. Section AIRFOIL contains 200 elements of type Line. Loading volume section SURFACE_BODY_1_1 from file. Loading surface section FARFIELD from file. Loading surface section AIRFOIL from file. Two dimensional problem. 71616 grid points. 71118 volume elements. 2 surface markers. 941 boundary elements in index 0 (Marker = FARFIELD). Error in "short unsigned int CConfig::GetMarker_CfgFile_TagBound(std::__cxx11:: string) const": ------------------------------------------------------------------------- The configuration file doesn't have any definition for marker FARFIELD ------------------------------ Error Exit ------------------------------- It seems like SU2 can't recognize the boundary condition although that i have set the b.c. in the configuration file, MARKER_EULER= ( airfoil ) MARKER_FAR= ( farfield ) The mesh for naca0012 is a unstructured C-type mesh, and has two nameselection as to farfield and airfoil. Have anyone encountered this problem and how to resolve this, Thanks so much for your help. Test condition Info: OS: Windows 10 SU2 Version: 7.3.1 Blackbird Mesh File: Made from ansys Configuration File: inv_NACA0012.cfg Operation Running: SU2_CFD |
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May 31, 2022, 05:26 |
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#2 |
Member
na
Join Date: Jul 2018
Posts: 90
Rep Power: 8 |
upper- lower case
as far as I see: MARKER_EULER= ( AIRFOIL ) MARKER_FAR= ( FARFIELD ) should do the trick. Best, Tobi |
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May 31, 2022, 09:34 |
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#3 |
New Member
jim
Join Date: May 2022
Posts: 6
Rep Power: 4 |
Hello TKatt,
Thanks for the quick reply, I have change all my b.c. to capital and some how it works but soon diverge(i think its because i put the "type line" that are not really b.c. to marker_far). And the lines that in ansys mesh are for sizing(numbers of divisions), has no physical meaning to the flow. Hence, i made a mesh with a circle, no other lines ,and it runs perfectly. so, if i have a complicated mesh with lots of lines for sizing , how to deal with those lines in SU2 ? because if i don't give them a marker SU2 will not run and i don't see any command that categorize those lines that are in no use. Thanks for the tips, best, JIM GIGI |
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.cgns, ansys, markers, mesh, su2 |
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