Hi, I want to mesh a part of a 3-D domain (which is cyclic), and impose cyclic boundary conditions, but the problem is that in my solver I assume that the two surfaces of the 3-D cell are the same. I send you an exemple of a part of a sphere. And by following recommendations of a previous message : http://www.geuz.org/pipermail/gmsh/2010/005511.html I didn't get the same mesh when I extruded the surface by rotation. So, is there a solution to have the same surface mesh for the two surfaces ? (teta = 0 and teta = pi/4) In the given example (for a periodic mesh), surfaces of the cube didn't have the same mesh actually :(
Thanks for your help. ________________________________ De : "[email protected]" <[email protected]> À : [email protected] Envoyé le : Jeu 17 juin 2010, 18h 35min 49s Objet : gmsh Digest, Vol 89, Issue 19 Send gmsh mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://www.geuz.org/mailman/listinfo/gmsh or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of gmsh digest..." Today's Topics: 1. Help (Henri Pascal-Jenny) 2. Question about reclassify (Martin Vymazal) 3. Re: freefem (Luis Casillas) ---------------------------------------------------------------------- Message: 1 Date: Thu, 17 Jun 2010 11:26:36 +0200 From: "Henri Pascal-Jenny" <[email protected]> Subject: [Gmsh] Help To: <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" Hi I am facing the problem of finding the minimum-3D box enclosing AS CLOSE AS POSSIBLE a set of 3D mesh points . I would like to avoid the use of a too-sophisticated algorithm . (cf. http://en.wikipedia.org/wiki/Minimum_bounding_box_algorithms) Actually, when used straightforwardly, the method "BoundingBox" available in a gmesh-session returns a 3D box which box does not always correspond to the minimum volume enclosing the set of points ( imagine a thin and not fully-planar shape tilted in respect to the axes of a standard coordinates-frame ) In fact, the matter comes from the bulk orientation of the envelop of the set of points under consideration. The usage is : BoundingBox { expression, expression, expression, expression, expression, expression }; what forces the bounding box of the scene to the given expressions (X min, X max, Y min, Y max, Z min, Z max). Therefore, I am wandering if there is a way of operating the "BoundingBox" method in order to get in the end the truly-minimum 3D box enclosing. Actually, I guess that there is a preliminary thing to do related to the coordinates system ; maybe I am wrong. Well, I would appreciate it very much if anyone could supply me for any piece of information regarding my problem. Thanks a lot in advance for your attention and your cooperation. Regards Henri Pascal-Jenny -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.geuz.org/pipermail/gmsh/attachments/20100617/9522a6bb/attachment-0001.htm> ------------------------------ Message: 2 Date: Thu, 17 Jun 2010 17:37:03 +0200 From: Martin Vymazal <[email protected]> Subject: [Gmsh] Question about reclassify To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes"; format="flowed" Hello, I would like to ask if it is possible to launch the 'reclassify' command from command line. I normally use it from the gui, but since all the other mesh processing is done using scripts, it would be nice if I could do this also without opening the gui. I have one more little question. Suppose I run reclassify, I get a lot of surfaces and I hide some of them by clicking in the gui. Is it possible to create a new geo/msh file which contains only entities currently set as visible? What I mean is that I don't want to save a file which is the original mesh with additional info about visibility, but I'd like to have a new file in which the 'invisible' parts are completely absent. Thank you. Best regards, Martin Vymazal ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. ------------------------------ Message: 3 Date: Thu, 17 Jun 2010 09:41:22 -0600 From: Luis Casillas <[email protected]> Subject: Re: [Gmsh] freefem To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii"; Format="flowed" Hi, I continue with the attempt to export a mesh to freefempp, the strange thing is that I have had success in a few cases, but in most of them I get errors, I'm attaching a pair of meshes that don't work, thanks Luis -------------- next part -------------- A non-text attachment was scrubbed... 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