mesh morphing to manually transform a patch

taalf · September 16, 2019, 03:37

Hi all,

In the config_template.cfg file from SU2 6.2, one can find (line 1069):

% - TRANSLATE_GRID ( x_Disp, y_Disp, z_Disp ), as a unit vector
% - ROTATE_GRID ( x_Orig, y_Orig, z_Orig, x_End, y_End, z_End ) axis, DV_VALUE in deg.

Is it possible to apply this transform only on some patch(es) selected using DV_MARKER, so that other patches stay untouched and the internal mesh is morphed?

Best regards,

pcg · September 16, 2019, 05:51

I believe those are rigid body motions only.

taalf · September 16, 2019, 07:45

Hi,

Could do the job using the DV_KIND= SURFACE_FILE approach (cf. tutorial SU2-6.2.0/TestCases/deformation/naca0012).

By launching SU2_DEF a first time, it creates some file containing all points of selected patches. Then, one edits this file with desired point coordinates after deformation, then re-launch SU2_DEF.

For translation, this is straighforward. For rotation, this needs a bit of scripting to edit the file.

Important parameters are also in the "GRID DEFORMATION PARAMETERS" section. I changed the DEFORM_STIFFNESS_TYPE value from INVERSE_VOLUME to WALL_DISTANCE to have cleaner results.

Hope this can help some more people.

All the best,

September 16, 2019, 03:37	mesh morphing to manually transform a patch	#1
taalf Member William Tougeron Join Date: Jan 2011 Location: Czech Republic Posts: 70 Rep Power: 16	Hi all, In the config_template.cfg file from SU2 6.2, one can find (line 1069): % - TRANSLATE_GRID ( x_Disp, y_Disp, z_Disp ), as a unit vector % - ROTATE_GRID ( x_Orig, y_Orig, z_Orig, x_End, y_End, z_End ) axis, DV_VALUE in deg. Is it possible to apply this transform only on some patch(es) selected using DV_MARKER, so that other patches stay untouched and the internal mesh is morphed? Best regards,

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September 16, 2019, 05:51		#2
pcg Senior Member Pedro Gomes Join Date: Dec 2017 Posts: 467 Rep Power: 14	I believe those are rigid body motions only.

September 16, 2019, 07:45		#3
taalf Member William Tougeron Join Date: Jan 2011 Location: Czech Republic Posts: 70 Rep Power: 16	Hi, Could do the job using the DV_KIND= SURFACE_FILE approach (cf. tutorial SU2-6.2.0/TestCases/deformation/naca0012). By launching SU2_DEF a first time, it creates some file containing all points of selected patches. Then, one edits this file with desired point coordinates after deformation, then re-launch SU2_DEF. For translation, this is straighforward. For rotation, this needs a bit of scripting to edit the file. Important parameters are also in the "GRID DEFORMATION PARAMETERS" section. I changed the DEFORM_STIFFNESS_TYPE value from INVERSE_VOLUME to WALL_DISTANCE to have cleaner results. Hope this can help some more people. All the best,