There was some errors in your .geo file and I attach here a new version.
You can control the refinement of the mesh by modifying the lc and lc2 characteristic length parameters at the beginning
of the file.
But I also have some problems if I click on the "Refine" button (is it what you were also doing ?). "Refine" is just
supposed to divide each triangle in 4 parts, it is not a smart mesh refinement tool, just a quick hack.
Dave
Javier Piñeiro wrote:
Dear David
I attach you the .geo file and the .msh I created over it. If you try to
refine the msh, it will do it after giving a good list of errors. Over
the .geo file, meshing you will obtain the same mesh, and if you try to
refine it there, at least in my case, the program crashes.
Than you for your help
Javier
2009/7/30 David Colignon <[email protected]
<mailto:[email protected]>>
Javier Piñeiro wrote:
Dear All
I am currently working on my MSc Thesis at Cranfield University
(UK) about Open Source and CFD, and Gmsh is one of the software
packages I am evaluating.
My problem is that the startpoint for the comparartive is a mesh
developed in Gambit. It is a quite big file, with around 500000
cells and 34 Mb. The format file is .msh, but Gmsh is not able
to open it (even though it opens .msh).
Hi Javier,
I suppose Gambit and Gmsh use .msh as an extension for mesh file,
but it doesn't mean that the format of the files is the same (open
both with a text editor to see the differences). I am not aware that
Gmsh is able to open Gambit mesh files... Gmsh has its own format
for mesh files:
http://www.geuz.org/gmsh/doc/texinfo/gmsh-full.html#SEC56
Does anyone know what the problem might be? Is there a way to
convert the file to something readible by Gmsh, if possible in
open source?
Gmsh can also import and export meshes in I-deas UNV, Nastran
BDF, STL, Medit MESH and VRML 1.0 files format
Is
the size of the file or the number of cells a limitation
I also tried to do the mesh from scratch on Gmsh, including the
geometry. I got a mesh but if I try to refine it the program
crashes.
Can you send us your .geo file ?
Cheers,
Dave
--
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Sart-Tilman B28
Université de Liège
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
Fax: +32 (0)4 366 29 10
WWW: http://hpc.montefiore.ulg.ac.be/
Agenda:
http://www.google.com/calendar/embed?src=david.colignon%40gmail.com
Changing the options in the characteristic length does not have
any effect, it generates exactly the same mesh. Does anyone know
something about this?
Thank you in advanced for your help
Kind regards
Javier Pineiro
--
Javier Piñeiro Pérez
------------------------------------------------------------------------
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--
Javier Piñeiro Pérez
lc = 10. ;
lc2 = 1000. ;
Point(1) = {0, 0, 0, lc};
Point(2) = {0.5, 2.339, 0, lc};
Point(3) = {1, 3.7271, 0, lc};
Point(4) = {2, 5.8025, 0, lc};
Point(5) = {4, 8.9238, 0, lc};
Point(6) = {8, 13.735, 0, lc};
Point(7) = {12, 17.8581, 0, lc};
Point(8) = {20, 25.3735, 0, lc};
Point(9) = {30, 33.0215, 0, lc};
Point(10) = {40, 39.1283, 0, lc};
Point(11) = {50, 44.2753, 0, lc};
Point(12) = {60, 48.7571, 0, lc};
Point(13) = {80, 56.4308, 0, lc};
Point(14) = {100, 62.9981, 0, lc};
Point(15) = {120, 68.6204, 0, lc};
Point(16) = {140, 73.43600000000001, 0, lc};
Point(17) = {160, 77.5707, 0, lc};
Point(18) = {180, 81.06870000000001, 0, lc};
Point(19) = {200, 83.92019999999999, 0, lc};
Point(20) = {220, 86.1433, 0, lc};
Point(21) = {240, 87.8308, 0, lc};
Point(22) = {260, 89.084, 0, lc};
Point(23) = {280, 90.0016, 0, lc};
Point(24) = {300, 90.68040000000001, 0, lc};
Point(25) = {320, 91.1857, 0, lc};
Point(26) = {340, 91.50790000000001, 0, lc};
Point(27) = {360, 91.6266, 0, lc};
Point(28) = {380, 91.52119999999999, 0, lc};
Point(29) = {400, 91.1712, 0, lc};
Point(30) = {420, 90.56570000000001, 0, lc};
Point(31) = {440, 89.7175, 0, lc};
Point(32) = {460, 88.64270000000001, 0, lc};
Point(33) = {480, 87.35720000000001, 0, lc};
Point(34) = {500, 85.8772, 0, lc};
Point(35) = {520, 84.2145, 0, lc};
Point(36) = {540, 82.3712, 0, lc};
Point(37) = {560, 80.348, 0, lc};
Point(38) = {580, 78.1451, 0, lc};
Point(39) = {600, 75.7633, 0, lc};
Point(40) = {620, 73.2055, 0, lc};
Point(41) = {640, 70.48220000000001, 0, lc};
Point(42) = {660, 67.60460000000001, 0, lc};
Point(43) = {680, 64.5843, 0, lc};
Point(44) = {700, 61.4329, 0, lc};
Point(45) = {720, 58.1599, 0, lc};
Point(46) = {740, 54.7675, 0, lc};
Point(47) = {760, 51.2565, 0, lc};
Point(48) = {780, 47.6281, 0, lc};
Point(49) = {800, 43.8836, 0, lc};
Point(50) = {820, 40.0245, 0, lc};
Point(51) = {840, 36.0536, 0, lc};
Point(52) = {860, 31.974, 0, lc};
Point(53) = {880, 27.7891, 0, lc};
Point(54) = {900, 23.5025, 0, lc};
Point(55) = {920, 19.1156, 0, lc};
Point(56) = {940, 14.6239, 0, lc};
Point(57) = {960, 10.0232, 0, lc};
Point(58) = {970, 7.6868, 0, lc};
Point(59) = {980, 5.3335, 0, lc};
Point(60) = {1000, 0, 0, lc};
Point(61) = {990, 2.969, 0, lc};
Point(62) = {0.5, -4.67, 0, lc};
Point(63) = {1, -5.9418, 0, lc};
Point(64) = {2, -7.8113, 0, lc};
Point(65) = {4, -10.5126, 0, lc};
Point(66) = {8, -14.2862, 0, lc};
Point(67) = {12, -16.9733, 0, lc};
Point(68) = {20, -20.2723, 0, lc};
Point(69) = {30, -22.6056, 0, lc};
Point(70) = {40, -24.5211, 0, lc};
Point(71) = {50, -26.0452, 0, lc};
Point(72) = {60, -27.1277, 0, lc};
Point(73) = {80, -28.4595, 0, lc};
Point(74) = {100, -29.3786, 0, lc};
Point(75) = {120, -29.9633, 0, lc};
Point(76) = {140, -30.2404, 0, lc};
Point(77) = {160, -30.2546, 0, lc};
Point(78) = {180, -30.049, 0, lc};
Point(79) = {200, -29.6656, 0, lc};
Point(80) = {220, -29.1445, 0, lc};
Point(81) = {240, -28.5181, 0, lc};
Point(82) = {260, -27.8164, 0, lc};
Point(83) = {280, -27.0696, 0, lc};
Point(84) = {300, -26.3079, 0, lc};
Point(85) = {320, -25.5565, 0, lc};
Point(86) = {340, -24.8176, 0, lc};
Point(87) = {360, -24.087, 0, lc};
Point(88) = {380, -23.3606, 0, lc};
Point(89) = {400, -22.6341, 0, lc};
Point(90) = {420, -21.9042, 0, lc};
Point(91) = {440, -21.1708, 0, lc};
Point(92) = {460, -20.4353, 0, lc};
Point(93) = {480, -19.6986, 0, lc};
Point(94) = {500, -18.9619, 0, lc};
Point(95) = {520, -18.2262, 0, lc};
Point(96) = {540, -17.4914, 0, lc};
Point(97) = {560, -16.7572, 0, lc};
Point(98) = {580, -16.0232, 0, lc};
Point(99) = {600, -15.2893, 0, lc};
Point(100) = {620, -14.5551, 0, lc};
Point(101) = {640, -13.8207, 0, lc};
Point(102) = {660, -13.0862, 0, lc};
Point(103) = {680, -12.3515, 0, lc};
Point(104) = {700, -11.6169, 0, lc};
Point(105) = {720, -10.8823, 0, lc};
Point(106) = {740, -10.1478, 0, lc};
Point(107) = {760, -9.4133, 0, lc};
Point(108) = {780, -8.678800000000001, 0, lc};
Point(109) = {800, -7.9443, 0, lc};
Point(110) = {820, -7.2098, 0, lc};
Point(111) = {840, -6.4753, 0, lc};
Point(112) = {860, -5.7408, 0, lc};
Point(113) = {880, -5.0063, 0, lc};
Point(114) = {900, -4.2718, 0, lc};
Point(115) = {920, -3.5373, 0, lc};
Point(116) = {940, -2.8028, 0, lc};
Point(117) = {960, -2.0683, 0, lc};
Point(118) = {980, -1.3339, 0, lc};
Point(119) = {970, -1.7011, 0, lc};
Point(120) = {990, -0.9666, 0, lc};
Point(121) = {-5000, 0, 0, lc2};
Point(122) = {0, 5000, 0, lc2};
Point(123) = {0, -5000, 0, lc2};
Point(124) = {10000, -5000, 0, lc2};
Point(125) = {10000, 5000, 1.2, lc2};
Line(1) = {60, 61};
Line(2) = {61, 59};
Line(3) = {59, 58};
Line(4) = {58, 57};
Line(5) = {57, 56};
Line(6) = {56, 55};
Line(7) = {55, 54};
Line(8) = {54, 53};
Line(9) = {53, 52};
Line(10) = {52, 51};
Line(11) = {51, 50};
Line(12) = {50, 49};
Line(13) = {49, 48};
Line(14) = {48, 47};
Line(15) = {47, 46};
Line(16) = {46, 45};
Line(17) = {45, 44};
Line(18) = {44, 43};
Line(19) = {43, 42};
Line(20) = {42, 41};
Line(21) = {41, 40};
Line(22) = {40, 39};
Line(23) = {39, 38};
Line(24) = {38, 37};
Line(25) = {37, 36};
Line(26) = {36, 35};
Line(27) = {35, 34};
Line(28) = {34, 33};
Line(29) = {33, 32};
Line(30) = {32, 31};
Line(31) = {31, 30};
Line(32) = {30, 29};
Line(33) = {29, 28};
Line(34) = {28, 27};
Line(35) = {27, 26};
Line(36) = {26, 25};
Line(37) = {25, 24};
Line(38) = {24, 23};
Line(39) = {23, 22};
Line(40) = {22, 22};
Line(41) = {22, 21};
Line(42) = {21, 20};
Line(43) = {20, 19};
Line(44) = {19, 18};
Line(45) = {18, 17};
Line(46) = {17, 16};
Line(47) = {16, 15};
Line(48) = {15, 14};
Line(49) = {14, 13};
Line(50) = {13, 12};
Line(51) = {12, 11};
Line(52) = {11, 10};
Line(53) = {10, 9};
Line(54) = {9, 8};
Line(55) = {8, 7};
Line(56) = {7, 6};
Line(57) = {6, 5};
Line(58) = {5, 4};
Line(59) = {4, 3};
Line(60) = {3, 2};
Line(61) = {2, 1};
Line(62) = {1, 62};
Line(63) = {62, 63};
Line(64) = {63, 64};
Line(65) = {64, 65};
Line(66) = {65, 66};
Line(67) = {66, 67};
Line(68) = {67, 68};
Line(69) = {68, 69};
Line(70) = {69, 70};
Line(71) = {70, 71};
Line(72) = {71, 72};
Line(73) = {72, 73};
Line(74) = {73, 74};
Line(75) = {74, 75};
Line(76) = {75, 76};
Line(77) = {76, 77};
Line(78) = {77, 78};
Line(79) = {78, 79};
Line(80) = {79, 80};
Line(81) = {80, 81};
Line(82) = {81, 82};
Line(83) = {82, 83};
Line(84) = {83, 84};
Line(85) = {84, 84};
Line(86) = {84, 85};
Line(87) = {85, 86};
Line(88) = {86, 87};
Line(89) = {87, 88};
Line(90) = {88, 89};
Line(91) = {89, 90};
Line(92) = {90, 91};
Line(93) = {91, 92};
Line(94) = {92, 93};
Line(95) = {93, 94};
Line(96) = {94, 95};
Line(97) = {95, 96};
Line(98) = {96, 97};
Line(99) = {97, 98};
Line(100) = {98, 99};
Line(101) = {99, 100};
Line(102) = {100, 101};
Line(103) = {101, 102};
Line(104) = {102, 103};
Line(105) = {103, 104};
Line(106) = {104, 105};
Line(107) = {105, 106};
Line(108) = {106, 107};
Line(109) = {107, 108};
Line(110) = {108, 109};
Line(111) = {109, 110};
Line(112) = {110, 111};
Line(113) = {111, 112};
Line(114) = {112, 113};
Line(115) = {113, 114};
Line(116) = {114, 115};
Line(117) = {115, 116};
Line(118) = {116, 117};
Line(119) = {117, 119};
Line(120) = {119, 118};
Line(121) = {118, 120};
Line(122) = {120, 60};
Circle(124) = {123, 1, 121};
Circle(125) = {121, 1, 122};
Line(126) = {122, 125};
Line(127) = {125, 124};
Line(128) = {124, 123};
Line Loop(130) = {126, 127, 128, 124, 125};
Line Loop(131) = {-22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11,
-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, -122, -121, -120, -119, -118, -117,
-116, -115, -114, -113, -112, -111, -110, -109, -108, -107, -106, -105, -104,
-103, -102, -101, -100, -99, -98, -97, -96, -95, -94, -93, -92, -91, -90, -89,
-88, -87, -86, -84, -83, -82, -81, -80, -79, -78, -77, -76, -75, -74, -73, -72,
-71, -70, -69, -68, -67, -66, -65, -64, -63, -62, -61, -60, -59, -58, -57, -56,
-55, -54, -53, -52, -51, -50, -49, -48, -47, -46, -45, -44, -43, -42, -41, -39,
-38, -37, -36, -35, -34, -33, -32, -31, -30, -29, -28, -27, -26, -25, -24, -23};
Plane Surface(132) = {130,131};
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