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February 17, 2010, 10:03 |
Mesh deformation using user fortran
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#1 |
New Member
Join Date: Jul 2009
Posts: 4
Rep Power: 17 |
Hi all,
I'm performing a FSI simulation using CFX and a custom code for the structural part. It deals with membranes. At the moment I'm performing a CFX run, stopping it and exporting the pressures on a specified boundary. Then I import them on the custom code to compute the membrane deformations. At this point I create a new mesh and restart a CFX calculation. I need 7-8 iterations of this procedure to achieve a convergence. I would like to use CFX 12 mesh deformation capabilities in order to avoid remeshing. I can provide the displacements of each node of the structural grid, and eventually interpolate the displacements to obtain the same nodes of the cfx grid (but I would prefer this to be done by CFX). I think that user fortran is needed to set the displacements of each node of the mesh. Is there any example available that can help me writing the routines? I need to load the displacements from a file (I can decide the format since i have full control on the output of the custom code) and set the mesh motion. Thanks in advance |
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February 17, 2010, 16:56 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,826
Rep Power: 144 |
There are a few examples which get provided in the CFX tutorials for this.
FSI is already in CFX and ANSYS Mechanical and is a pretty good coupling from all reports (I have never used it). Why do you need a custom code? |
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February 18, 2010, 03:25 |
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#3 |
New Member
Join Date: Jul 2009
Posts: 4
Rep Power: 17 |
Thanks Glenn,
I've looked at the tutorials but the mesh deformation is made using CEL functions (valve) or with a coupling with ANSYS (Oscillating plate). I'll check the documentation in depth. I need the custom code for the structural part because there's a lot of work on it, I'm confident of its results for our specific problem and I don't want to create a brand new model in ANSYS Mechanical (I don't even know if it's possible to do it, it's not my work, I 'm involved in the CFD part). |
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February 18, 2010, 16:49 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,826
Rep Power: 144 |
In CFX V11 the ball valve tutorial one used a fortran method. I think it was removed in V12. If you can get your hands on the documentation for V11 you will see the fortran they used.
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mesh deformation, user fortran |
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