Thanks Dr. Matthias and Jean Pierre.
I built the cubic body as you told me, extruding both surfaces. After that I've built a physical body for the cubic one with those two bodies created by the extrusion, _ _I expect that this will fuse them as only one for the solver. Thank you for your advices. Félix Navarro Guirado | Físico Médico - Ingeniero [email protected] +34 655 641 421| +34 952 92 97 22 Avda Calderón de la Barca s/n, Urb. Magna Marbella, Edificio Sorolla, bajo, 29660 Marbella www.magna [1]medic.com [1] Fax: +34 952.90.64.56 El 2015-10-07 12:57, Zenker, Dr. Matthias escribió: > Hi, > > „conformal" means that the mesh should be unique for interfaces between > touching bodies. > > In order to achieve that, you need to make sure that no interface between > bodies is duplicated. > > If you have a smaller surface on top of a larger one, you have to define the > larger surface with the boundary line of the smaller one as a hole - that is > what you did with surfaces 200 and 201. > > Then just define your rectangular volume using both surfaces. You don't need > to make a compound or the like. > > HTH, > > Matthias > > VON: I+D Magna Medic [mailto:[email protected]] > GESENDET: Dienstag, 6. Oktober 2015 12:23 > AN: [email protected] > BETREFF: [Gmsh] Conformal surfaces. > > Dear gMeshers, > > I want to build three volumes as input mesh for my solver software (ELMER). > In order to make the current flow I've been adviced to make the surfaces > between them "conformal". > > The structure is very simple: a rectangular parallelepiped (30cm x 30 cm x 20 > cm height) and two cilinders touching that body on the top and bottom faces. > The cilinders act as electrodes (3mm height , 22 cm diameter). > > The only thing that I need to know is how to make the coincident surfaces > "conformal". I think that this means that they should be exactly equal or > maybe the same surface. > > My geo file looks like this: (for simplicity I'll detail the bottom cilinder > only) > > R = 0.11; > > Point(1) = {-0.15, -0.15, -0.1, 0.1}; //Bottom face for parallelepiped > Point(2) = {0.15, -0.15, -0.1, 0.1}; > Point(3) = {0.15, 0.15, -0.1, 0.1}; > Point(4) = {-0.15, 0.15, -0.1, 0.1}; > Line(1) = {3, 4}; > Line(2) = {4, 1}; > Line(3) = {1, 2}; > Line(4) = {2, 3}; > Line Loop(100) = {1, 2, 3, 4}; > > Point(5) = { 0, 0, -0.10, 0.1}; //Center for the base of the cilinder > Point(6) = { R, 0, -0.10, 0.1}; > Point(7) = { 0, -R, -0.10, 0.1}; > Point(8) = {-R, 0, -0.10, 0.1}; > Point(9) = { 0, R, -0.10, 0.1}; > //Arcs > Circle(5) = {6, 5, 7}; > Circle(6) = {7, 5, 8}; > Circle(7) = {8, 5, 9}; > Circle(8) = {9, 5, 6}; > Line Loop(101)= {5, 6, 7, 8}; > > Now I tried several strategies without good results. > > If I make a compound surface, the new one is different than the base of the > cilinder, let me explain: > > Plane Surface (200) = {100, 101}; > Plane Surface (201) = {101}; > Compound Surface (203) = {200, 201}; > > The mesh generated by the surface 203 is quite different from those generated > by 200 or 201. Then I tried: > > boundMaster[] = Boundary{Surface{203};}; > boundSlave[] = Boundary{Surface{201};}; > Periodic Surface 201 {boundSlave[]} = 203 {boundMaster[]}; > > But this throws an error because boundMaster is empty, this surprised me. And > if I try to select boundaries by hand gMSH throws "Impossible to take > boundaries of entity 203 (of type 307)". > > My second trial was: > > Plane Surface (200) = {100}; //Base of the parallelepiped > Plane Surface (201) = {101}; //Base of the cilinder > > boundMaster[] = Boundary{Surface{200};}; > boundSlave[] = Boundary{Surface{201};}; > Periodic Surface 201 {boundSlave[]} = 200 {boundMaster[]}; > > This trows: (even if create circles "In Surface 200") > > Error : parallel planes do not intersect > Error : parallel planes do not intersect > Error : Only rotations or translations can currently be computed > automatically for periodic faces: face 201 not meshed. > > What would you do? > > Thanks in advance, this is halting my work and any help would be appreciated. > > _____________________________________________________________________ > ERBE Elektromedizin GmbH > Firmensitz: 72072 Tuebingen > Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede > Registergericht: Stuttgart HRB 380137 Links: ------ [1] http://www.magnamedic.com/
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