|
[Sponsors] |
Negative Volumes SU2_DEF for a wing-body junction case |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
December 17, 2014, 12:04 |
Negative Volumes SU2_DEF for a wing-body junction case
|
#1 |
Member
Zeno
Join Date: Sep 2013
Location: Delft, The Netherlands
Posts: 63
Rep Power: 12 |
Dear Developers,
I was testing the SU2_DEF capabilities in terms of deformation of a mesh at the wing-body corner. My wing is a Rood wing and my body is a simple flat plate attached to it. The mesh is completely structured and more info about the case can be found here: http://cfd.mace.manchester.ac.uk/cgi...html&1&0&0&0&0 I want to perform a deformation of the flat plate in the spanwise direction only (y-axis). Attached is the configuration file I used. To test SU2_DEF I moved one design variable in the spanwise direction and checked the surface mesh deformation and the volumetric mesh deformation (see figures). The surface mesh deformation is fine, however, the volumetric mesh deformation produces negative volume cells from the first linear iteration. I then reduced DV_VALUE of a orderd of magnitude every time until I got no negative volume cells. However, this happened for a DV_VALUE=-0.00001 meaning the deformation of the flat plate is negligible. The aim of my work is to optimize the junction area and I am expecting large deformations of the body in that area. Hence, I can't afford having such a small DV_VALUE (which, if I understood correctly, it will take the value of the scaling factor of the OPT_OBJECTIVE term) because it would take an awfully large number of cycles to get to the final shape and I expect negative volume cells to pop up anyways at a certain point. Do you have any suggestions on how to solve this problem? Thank you very much, Zeno |
|
Tags |
junction flows, mesh deformation, negative volume cells, su2_def |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[blockMesh] Errors during blockMesh meshing | Madeleine P. Vincent | OpenFOAM Meshing & Mesh Conversion | 51 | May 30, 2016 10:51 |
Who know the LANN Wing Case. | boling | Main CFD Forum | 1 | April 19, 2015 07:57 |
[ICEM] Wing Body Tutorial - Improved blocking | Far | ANSYS Meshing & Geometry | 2 | August 3, 2013 20:16 |
Highly skewed and inverted volumes in wing mesh | makaero | FLUENT | 0 | December 8, 2009 19:32 |
Standart test case for blunt body | Munikrishna | Main CFD Forum | 0 | August 17, 2005 09:24 |