# Surface triangle mesh with strict constraint

 Register Blogs Members List Search Today's Posts Mark Forums Read

 October 4, 2012, 13:56 Surface triangle mesh with strict constraint #1 New Member   Arno Mayrhofer Join Date: Jan 2010 Location: University of Manchester Posts: 4 Rep Power: 7 Dear all, as I'm from the meshfree community my skills in meshing are practically non-existent. However, I have the following problem at hand which I can't seem to be able to find a solution for. Let's assume I have a general shell geometry and I would want a surface mesh of this shell. First of all, I can only use triangles and secondly I want to impose a limit on the edge length of the triangles. Now, I tried Icem, gmsh and Salome and although they let me impose a limit, it is not strictly enforced. That means that if I set my max edge length = 0.1, there would always be edges with length > 0.1. Unfortunately that renders the meshing useless as I really need strict enforcement of this constraint. Thus my simple question, is there a meshing software that can achieve this? Bonus question: The actual constraint that I have is the distance from the triangles barycentre to the vertices. Again, I'd need strict enforcement but I guess there is no meshing software that actually even has such a constraint or am I wrong? Thanks in advance for your help, Arno

 October 4, 2012, 18:56 #2 Senior Member   Julien de Charentenay Join Date: Jun 2009 Location: Australia Posts: 229 Rep Power: 9 Hi Arno, I do not know of a meshing software that would fit your requirements. But how hard is it to subdivide a triangle to meet the distance requirements? Julien __________________ --- Julien de Charentenay

 October 5, 2012, 03:34 #3 New Member   Arno Mayrhofer Join Date: Jan 2010 Location: University of Manchester Posts: 4 Rep Power: 7 Hi Julien, thanks for your reply. Well obviously it's not hard to just split a triangle into two. But for computational reasons I'd like to have as less triangles as possible. As you might now meshfree methods are already slow, so I'd like to avoid every additional load if I can. Cheers, Arno

 October 5, 2012, 04:47 #4 Super Moderator   Oliver Gloth Join Date: Mar 2009 Location: Todtnau, Germany Posts: 115 Rep Power: 8 Hi Arno, we develop an open-source tool called enGrid which has its own surface mesher. Although the feature you require is not there, it would probably not be too difficult to implement it. If you want to try, I could point you in the right direction. Or, alternatively, if you have a small budget we could implement it for you. One (current) requirement of enGrid, however, could be a show-stopper: As geometry you need to provide a water-tight STL geometry (or similar) -- you cannot import CAD geometries directly. Cheers, Oliver

 October 5, 2012, 04:57 #5 New Member   Arno Mayrhofer Join Date: Jan 2010 Location: University of Manchester Posts: 4 Rep Power: 7 Hi Oliver, I'm a PhD student, so funds for these kinds of things are not available unfortunately. Also, I probably won't have time to work on it during my day to day work, so it'd be a free time project. I'll send you a pm with my email so that we can discuss further things in private without spamming around here. The STL requirement is not a problem for me. From your website I see that I could use STEP or IGES which is pretty much all I need. Cheers, Arno

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Anorky ANSYS Meshing & Geometry 4 November 12, 2014 01:27 vishwa OpenFOAM Native Meshers: snappyHexMesh and Others 23 August 6, 2014 03:50 Ganesh FLUENT 13 January 22, 2014 05:11 everest ANSYS Meshing & Geometry 39 June 5, 2013 19:02 chelvistero OpenFOAM 11 January 15, 2010 20:43

All times are GMT -4. The time now is 09:46.