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AEMD September 11, 2013 11:56

sliding mesh file format
 
Hi,

I am trying to simulate a pitching airfoil using sliding mesh similar to the case described in:
http://adl.stanford.edu/papers/AIAA-2013-0632.pdf
I didn't find many information or tutorial on it and have some difficulty to get the preprocessing working using SU2_SMC.
It seems that the mesh file has to contain first a line "NZONE= number of zones" (2 in my case) and then a zone identifier "IZONE= zone ID" followed by the zone information (elements, points, markers) for each zone. Using this format, SU2_SMC gets stuck reading the first zone.
Is it the right procedure?
Thank you very much, the code is improving very fast!

economon September 12, 2013 03:54

Hi,

Unfortunately, we have frozen development on the sliding mesh interfaces for the time being while we upgrade many other portions of the code for a major V3.0 release next January. If you might be interested in developing some of the sliding mesh capabilities, please let me know.

In the meantime, I might suggest trying the rigid and deforming mesh motion capabilities in the code, if they suit your needs (check the config_template.cfg for more description of these options). These are under active development right now, and will have many improvements for SU2 V3.0.

Thanks for the support and for using SU2!
Tom

AEMD September 12, 2013 19:09

Thank you for your reply, I will use the rigid motion and deforming features of the code. Is it possible to introduce a prescribed motion as a function of time? That would be very interesting to simulate more complex motions.
Thanks

economon October 3, 2013 00:48

Quote:

Originally Posted by AEMD (Post 451429)
Thank you for your reply, I will use the rigid motion and deforming features of the code. Is it possible to introduce a prescribed motion as a function of time? That would be very interesting to simulate more complex motions.
Thanks

Yes, we have several options. First, the rigid motion options allow one to specify pitching, plunging, translating, or rotating motion in time using the options found in the file SU2/config_template.cfg. At the moment, the deforming mesh option is set up for pitching, and we are in the process of adding plunging, etc.

Lastly, we do in fact have a method for prescribing arbitrary motion of a surface by providing the node locations at each time step. The volume mesh is then deformed around the new surface. This capability is enabled by choosing the EXTERNAL motion option along with the specified motion files. If you are interested in this, don't hesitate to contact me for more details.

Cheers,
Tom

Sachchit May 19, 2015 07:28

Quote:

Originally Posted by AEMD (Post 451163)
Hi,

I am trying to simulate a pitching airfoil using sliding mesh similar to the case described in:
http://adl.stanford.edu/papers/AIAA-2013-0632.pdf
I didn't find many information or tutorial on it and have some difficulty to get the preprocessing working using SU2_SMC.
It seems that the mesh file has to contain first a line "NZONE= number of zones" (2 in my case) and then a zone identifier "IZONE= zone ID" followed by the zone information (elements, points, markers) for each zone. Using this format, SU2_SMC gets stuck reading the first zone.
Is it the right procedure?
Thank you very much, the code is improving very fast!

Hi,

For simulating FSI problem if
FluidStructureIteration(COutput *output, CIntegration ***integration_container, CGeometry ***geometry_container, CSolver ****solver_container, CNumerics *****numerics_container, CConfig **config_container, CSurfaceMovement **surface_movement, CVolumetricMovement **grid_movement, CFreeFormDefBox*** FFDBox)
is used than for solving FEA model using linear elasticity model it required to create 2 zone in the mesh. I have tried with NZONE=2 and IZONE but stuck with the same problem as AEMD. Can you explain a correct way to write a mesh file. I am using Gmsh and combining two different meshes in two IZONEs.

Is it necessary to have all boundaries of zones to be connected? If not how to give boundary marker to boundary which is explicit to one zone only. In SU2_CFD config_container[iZone] = new CConfig(config_file_name, SU2_CFD, iZone, nZone, VERB_HIGH) takes iZone as input. But to the best of my understanding implementation of class CConfig in config_structure.cpp shows no structure to link some configuration option explicitly to particular iZone only. If there is a way it would be great.

I am hoping to simulate AGARD 445.6 and make a testcase for showcasing SU2 aeroelasticity capability. Is there any updates regarding 3D FEA solver?

Thanks,


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