- **SU2**
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- - **Spring deformation return a torsional mesh**
(*http://www.cfd-online.com/Forums/su2/116301-spring-deformation-return-torsional-mesh.html*)

Spring deformation return a torsional mesh1 Attachment(s)
Hi,
I am using SU2_MDC to do the mesh deformation. Only part of the airfoil deformed, such as trailing edge. In 2D problem, Spring returns a torsional grid, as shown in the picture. TorsionalSpring returns a correct grid. In 3D problem, Spring can work some time, if the mesh is coarse. TorsionalSpring cannot work. How to deal with this problem? Thanks. Attachment 20830 |

Hi Sean,
We are in fact working on some techniques for deforming fine/viscous meshes in a more robust manner and plan to have this functionality working in a couple of months. For now, if you are interested in modifying the code, there are a couple of options that you can try: free-form deformation or the linear elasticity solver. These features exist in SU2 in other contexts but will need modification to work with grid deformation. Hope this helps! Tom |

Hi Tom,
Thanks for this reply. I am interested that the TorsionalSpringMethod work very well for 2D, even I have very small yplus, the height of the first cell is 5e-6m. But TorsionalSpringMethod can not work for 3D mesh. I noticed that there is only Set2DMatrix_Structure(geometry) in TorsionalSpringMethod. Set3DMatrix_Structure is not called by TorsionalSpringMethod. I added Set3DMatrix_Structure because there is already one, but still cannot work. Is there any problem about Set3DMatrix_Structure? Can I modify this function? I will appreciate if you can give more information on this function, such as theory or reference. Thanks. Sean |

Quote:
We are currently implementing a 3D deformation strategy based on linear elasticity deformations (much better than spring analogy), it will be finish in the next monthly review. Cheers, Francisco |

Francisco,
I am so exciting to hear about this update. I am looking forward to the new version of SU2. Thanks |

Quote:
Just wanted to let you know that in the new version of SU2 released today, V2.0.4, we have implemented a preliminary version of a grid deformation routine based on the linear elasticity equations. At the moment, it is only set up for use in 2-D, but the 3-D version should be finished by next month. Please feel free to give it a try with your 2-D meshes by using: GRID_DEFORM_METHOD= FEA Cheers, Tom |

Tom,
Hi, it is great update. SU2 is becoming more strong and powerful. I am looking forward to the stable release. Sean |

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