[Gmsh] Error "Self intersecting surface mesh, computing intersections" depending of characteristic length cl
PLAUSSU Jean-Raoul CNRS
jean-raoul.plaussu at cea.fr
Mon Apr 15 16:08:22 CEST 2013
Hello,
I programmed the following 3D geo file.
Gmsh can mesh it with big characteristic lengths cl1=500 and cl2=100, giving 686 triangles. That means there isn't any syntax error in my file.
But reducing the characteristic length cl to cl=1 in order to get more triangles, and then meshing the volume, Gmsh gives the following error message:
Error : Self intersecting surface mesh, computing intersections (this could take a while)
Info : 1327 intersecting faces have been saved into 'intersect.pos'
Info : Done meshing 3D (42.7131 s)
Info : 32123 vertices 69639 elements
Error : ------------------------------
Error : Mesh generation error summary
Error : 0 warnings
Error : 1 error
Error : Check the full log for details
Error : ------------------------------
What could be the cause of this error?
How could I solve it?
L_P = 300;
L_I = 100;
L_N = 300;
L_ox = 200;
R = 5;
t_ox = 1.4;
cl1 = 5;
cl2 = 1;
// Points physiques
Point(5) = {0, 0, -L_I/2, cl1};
Point(6) = {R, 0, -L_I/2, cl1};
Point(7) = {-R, 0, -L_I/2, cl1};
Point(8) = {0, R, -L_I/2, cl1};
Point(9) = {0, -R, -L_I/2, cl1};
Point(10) = {0, 0, L_I/2, cl1};
Point(11) = {R, 0, L_I/2, cl1};
Point(12) = {-R, 0, L_I/2, cl1};
Point(13) = {0, R, L_I/2, cl1};
Point(14) = {0, -R, L_I/2, cl1};
Point(15) = {0, 0, -L_I/2-L_P, cl2};
Point(16) = {R, 0, -L_I/2-L_P, cl2};
Point(17) = {-R, 0, -L_I/2-L_P, cl2};
Point(18) = {0, R, -L_I/2-L_P, cl2};
Point(19) = {0, -R, -L_I/2-L_P, cl2};
Point(20) = {0, 0, L_I/2+L_N, cl2};
Point(21) = {R, 0, L_I/2+L_N, cl2};
Point(22) = {-R, 0, L_I/2+L_N, cl2};
Point(23) = {0, R, L_I/2+L_N, cl2};
Point(24) = {0, -R, L_I/2+L_N, cl2};
Point(25) = {0, 0, -L_ox/2, cl1};
Point(26) = {R, 0, -L_ox/2, cl1};
Point(27) = {-R, 0, -L_ox/2, cl1};
Point(28) = {0, R, -L_ox/2, cl1};
Point(29) = {0, -R, -L_ox/2, cl1};
Point(30) = {0, 0, L_ox/2, cl1};
Point(31) = {R, 0, L_ox/2, cl1};
Point(32) = {-R, 0, L_ox/2, cl1};
Point(33) = {0, R, L_ox/2, cl1};
Point(34) = {0, -R, L_ox/2, cl1};
Point(35) = {R+t_ox, 0, -L_ox/2, cl2};
Point(36) = {-(R+t_ox), 0, -L_ox/2, cl2};
Point(37) = {0, R+t_ox, -L_ox/2, cl2};
Point(40) = {R+t_ox, 0, L_ox/2, cl2};
Point(41) = {-(R+t_ox), 0, L_ox/2, cl2};
Point(42) = {0, R+t_ox, L_ox/2, cl2};
Point(44) = {R+t_ox, 0, L_I/2, cl2};
Point(45) = {-(R+t_ox), 0, L_I/2, cl2};
Point(46) = {0, R+t_ox, L_I/2, cl2};
Point(48) = {R+t_ox, 0, -L_I/2, cl2};
Point(49) = {-(R+t_ox), 0, -L_I/2, cl2};
Point(50) = {0, R+t_ox, -L_I/2, cl2};
//Points géométriques pour maillage non uniforme
Point(52) = {0, 0, 0.9*(L_I/2+L_N), cl2}; // extremites fil
Point(53) = {R, 0, 0.9*(L_I/2+L_N), cl2};
Point(54) = {-R, 0, 0.9*(L_I/2+L_N), cl2};
Point(55) = {0, R, 0.9*(L_I/2+L_N), cl2};
Point(56) = {0, -R, 0.9*(L_I/2+L_N), cl2};
Point(57) = {0, 0, 0.9*(-L_I/2-L_P), cl2};
Point(58) = {R, 0, 0.9*(-L_I/2-L_P), cl2};
Point(59) = {-R, 0, 0.9*(-L_I/2-L_P), cl2};
Point(60) = {0, R, 0.9*(-L_I/2-L_P), cl2};
Point(61) = {0, -R, 0.9*(-L_I/2-L_P), cl2};
Point(62) = {0.9*R, 0, -L_ox/2, cl2}; // surface fil
Point(63) = {-0.9*R, 0, -L_ox/2, cl2};
Point(64) = {0, 0.9*R, -L_ox/2, cl2};
Point(65) = {0, -0.9*R, -L_ox/2, cl2};
Point(66) = {0.9*R, 0, L_ox/2, cl2};
Point(67) = {-0.9*R, 0, L_ox/2, cl2};
Point(68) = {0, 0.9*R, L_ox/2, cl2};
Point(69) = {0, -0.9*R, L_ox/2, cl2};
Point(70) = {0.9*R, 0, L_I/2, cl2};
Point(71) = {-0.9*R, 0, L_I/2, cl2};
Point(72) = {0, 0.9*R, L_I/2, cl2};
Point(73) = {0, -0.9*R, L_I/2, cl2};
Point(74) = {0.9*R, 0, -L_I/2, cl2};
Point(75) = {-0.9*R, 0, -L_I/2, cl2};
Point(76) = {0, 0.9*R, -L_I/2, cl2};
Point(77) = {0, -0.9*R, -L_I/2, cl2};
Point(78) = {0.9*R, 0, 0.9*(L_I/2+L_N), cl2};
Point(79) = {-0.9*R, 0, 0.9*(L_I/2+L_N), cl2};
Point(80) = {0, 0.9*R, 0.9*(L_I/2+L_N), cl2};
Point(81) = {0, -0.9*R, 0.9*(L_I/2+L_N), cl2};
Point(82) = {0.9*R, 0, 0.9*(-L_I/2-L_P), cl2};
Point(83) = {-0.9*R, 0, 0.9*(-L_I/2-L_P), cl2};
Point(84) = {0, 0.9*R, 0.9*(-L_I/2-L_P), cl2};
Point(85) = {0, -0.9*R, 0.9*(-L_I/2-L_P), cl2};
Circle(5) = {74, 5, 76};
Circle(6) = {76, 5, 75};
Circle(7) = {75, 5, 77};
Circle(8) = {77, 5, 74};
Circle(9) = {62, 25, 64};
Circle(10) = {64, 25, 63};
Circle(11) = {63, 25, 65};
Circle(12) = {65, 25, 62};
Circle(13) = {8, 5, 6};
Circle(14) = {6, 5, 9};
Circle(15) = {9, 5, 7};
Circle(16) = {7, 5, 8};
Circle(17) = {28, 25, 26};
Circle(18) = {26, 25, 29};
Circle(19) = {29, 25, 27};
Circle(20) = {27, 25, 28};
Circle(21) = {72, 10, 70};
Circle(22) = {70, 10, 73};
Circle(23) = {73, 10, 71};
Circle(24) = {71, 10, 72};
Circle(25) = {13, 10, 11};
Circle(26) = {11, 10, 14};
Circle(27) = {14, 10, 12};
Circle(28) = {12, 10, 13};
Circle(29) = {68, 30, 66};
Circle(30) = {66, 30, 69};
Circle(31) = {69, 30, 67};
Circle(32) = {67, 30, 68};
Circle(33) = {33, 30, 31};
Circle(34) = {31, 30, 34};
Circle(35) = {34, 30, 32};
Circle(36) = {32, 30, 33};
Circle(37) = {42, 30, 41};
Circle(38) = {42, 30, 40};
Circle(39) = {44, 10, 46};
Circle(40) = {46, 10, 45};
Circle(41) = {50, 5, 49};
Circle(42) = {50, 5, 48};
Circle(43) = {37, 25, 35};
Circle(44) = {36, 25, 37};
Circle(45) = {82, 57, 85};
Circle(46) = {85, 57, 83};
Circle(47) = {83, 57, 84};
Circle(48) = {84, 57, 82};
Circle(49) = {58, 57, 61};
Circle(50) = {61, 57, 59};
Circle(51) = {59, 57, 60};
Circle(52) = {60, 57, 58};
Circle(53) = {17, 15, 18};
Circle(54) = {18, 15, 16};
Circle(55) = {16, 15, 19};
Circle(56) = {19, 15, 17};
Circle(57) = {23, 20, 21};
Circle(58) = {21, 20, 24};
Circle(59) = {24, 20, 22};
Circle(60) = {22, 20, 23};
Circle(61) = {80, 52, 79};
Circle(62) = {79, 52, 81};
Circle(63) = {81, 52, 78};
Circle(64) = {78, 52, 80};
Circle(65) = {55, 52, 53};
Circle(66) = {53, 52, 56};
Circle(67) = {56, 52, 54};
Circle(68) = {54, 52, 55};
Line Loop(69) = {57, 58, 59, 60};
Plane Surface(70) = {69};
Line Loop(71) = {64, 61, 62, 63};
Plane Surface(72) = {71};
Line Loop(73) = {65, 66, 67, 68};
Plane Surface(74) = {71, 73};
Line Loop(75) = {29, 30, 31, 32};
Plane Surface(76) = {75};
Line Loop(77) = {33, 34, 35, 36};
Plane Surface(78) = {75, 77};
Line Loop(79) = {21, 22, 23, 24};
Plane Surface(80) = {79};
Line Loop(81) = {25, 26, 27, 28};
Plane Surface(82) = {79, 81};
Line Loop(85) = {6, 7, 8, 5};
Plane Surface(86) = {85};
Line Loop(87) = {16, 13, 14, 15};
Plane Surface(88) = {85, 87};
Line Loop(89) = {10, 11, 12, 9};
Plane Surface(90) = {89};
Line Loop(91) = {20, 17, 18, 19};
Plane Surface(92) = {89, 91};
Line Loop(93) = {47, 48, 45, 46};
Plane Surface(94) = {93};
Line Loop(95) = {51, 52, 49, 50, 45, 46, 47, 48};
Plane Surface(96) = {95};
Line Loop(97) = {53, 54, 55, 56};
Plane Surface(98) = {97};
Line(99) = {31, 40};
Line(100) = {11, 44};
Line(101) = {6, 48};
Line(102) = {26, 35};
Line(103) = {27, 36};
Line(104) = {7, 49};
Line(105) = {12, 45};
Line(106) = {32, 41};
Line Loop(107) = {43, -102, -17, -20, 103, 44};
Plane Surface(108) = {107};
Line Loop(109) = {42, -101, -13, -16, 104, -41};
Plane Surface(110) = {109};
Line Loop(111) = {39, 40, -105, 28, 25, 100};
Plane Surface(112) = {111};
Line Loop(113) = {38, -99, -33, -36, 106, -37};
Plane Surface(114) = {113};
Line(115) = {24, 56};
Line(116) = {56, 34};
Line(117) = {34, 14};
Line(118) = {14, 9};
Line(119) = {9, 29};
Line(120) = {29, 61};
Line(121) = {61, 19};
Line(122) = {81, 69};
Line(123) = {69, 73};
Line(124) = {73, 77};
Line(125) = {77, 65};
Line(126) = {65, 85};
Line(127) = {21, 53};
Line(128) = {53, 31};
Line(129) = {31, 11};
Line(130) = {11, 6};
Line(131) = {6, 26};
Line(132) = {26, 58};
Line(133) = {58, 16};
Line(134) = {78, 66};
Line(135) = {66, 70};
Line(136) = {70, 74};
Line(137) = {74, 62};
Line(138) = {62, 82};
Line(139) = {22, 54};
Line(140) = {54, 32};
Line(141) = {32, 12};
Line(142) = {12, 7};
Line(143) = {7, 27};
Line(144) = {27, 59};
Line(145) = {59, 17};
Line(146) = {79, 67};
Line(147) = {67, 71};
Line(148) = {71, 75};
Line(149) = {75, 63};
Line(150) = {63, 83};
Line(151) = {80, 68};
Line(152) = {68, 72};
Line(153) = {72, 76};
Line(154) = {76, 64};
Line(155) = {64, 84};
Line(156) = {23, 55};
Line(157) = {55, 33};
Line(158) = {33, 13};
Line(159) = {13, 8};
Line(160) = {8, 28};
Line(161) = {28, 60};
Line(162) = {60, 18};
Line(163) = {40, 44};
Line(164) = {44, 48};
Line(165) = {48, 35};
Line(166) = {42, 46};
Line(167) = {46, 50};
Line(168) = {50, 37};
Line(169) = {41, 45};
Line(170) = {45, 49};
Line(171) = {49, 36};
Line Loop(172) = {64, 151, 29, -134};
Ruled Surface(173) = {172};
Line Loop(174) = {29, 135, -21, -152};
Ruled Surface(175) = {174};
Line Loop(176) = {21, 136, 5, -153};
Ruled Surface(177) = {176};
Line Loop(178) = {5, 154, -9, -137};
Ruled Surface(179) = {178};
Line Loop(180) = {9, 155, 48, -138};
Ruled Surface(181) = {180};
Line Loop(182) = {138, 45, -126, 12};
Ruled Surface(183) = {182};
Line Loop(184) = {12, -137, -8, 125};
Ruled Surface(185) = {184};
Line Loop(186) = {8, -136, 22, 124};
Ruled Surface(187) = {186};
Line Loop(188) = {22, -123, -30, 135};
Ruled Surface(189) = {188};
Line Loop(190) = {30, -122, 63, 134};
Ruled Surface(191) = {190};
Line Loop(192) = {122, 31, -146, 62};
Ruled Surface(193) = {192};
Line Loop(194) = {31, 147, -23, -123};
Ruled Surface(195) = {194};
Line Loop(196) = {23, 148, 7, -124};
Ruled Surface(197) = {196};
Line Loop(198) = {7, 125, -11, -149};
Ruled Surface(199) = {198};
Line Loop(200) = {11, 126, 46, -150};
Ruled Surface(201) = {200};
Line Loop(202) = {150, 47, -155, 10};
Ruled Surface(203) = {202};
Line Loop(204) = {10, -149, -6, 154};
Ruled Surface(205) = {204};
Line Loop(206) = {6, -148, 24, 153};
Ruled Surface(207) = {206};
Line Loop(208) = {24, -152, -32, 147};
Ruled Surface(209) = {208};
Line Loop(210) = {32, -151, 61, 146};
Ruled Surface(211) = {210};
Line Loop(212) = {156, 65, -127, -57};
Ruled Surface(213) = {212};
Line Loop(214) = {65, 128, -33, -157};
Ruled Surface(215) = {214};
Line Loop(216) = {33, 129, -25, -158};
Ruled Surface(217) = {216};
Line Loop(218) = {25, 130, -13, -159};
Ruled Surface(219) = {218};
Line Loop(220) = {13, 131, -17, -160};
Ruled Surface(221) = {220};
Line Loop(222) = {17, 132, -52, -161};
Ruled Surface(223) = {222};
Line Loop(224) = {52, 133, -54, -162};
Ruled Surface(225) = {224};
Line Loop(226) = {133, 55, -121, -49};
Ruled Surface(227) = {226};
Line Loop(228) = {49, -120, -18, 132};
Ruled Surface(229) = {228};
Line Loop(230) = {18, -119, -14, 131};
Ruled Surface(231) = {230};
Line Loop(232) = {14, -118, -26, 130};
Ruled Surface(233) = {232};
Line Loop(234) = {26, -117, -34, 129};
Ruled Surface(235) = {234};
Line Loop(236) = {34, -116, -66, 128};
Ruled Surface(237) = {236};
Line Loop(238) = {66, -115, -58, 127};
Ruled Surface(239) = {238};
Line Loop(240) = {115, 67, -139, -59};
Ruled Surface(241) = {240};
Line Loop(242) = {67, 140, -35, -116};
Ruled Surface(243) = {242};
Line Loop(244) = {35, 141, -27, -117};
Ruled Surface(245) = {244};
Line Loop(246) = {27, 142, -15, -118};
Ruled Surface(247) = {246};
Line Loop(248) = {15, 143, -19, -119};
Ruled Surface(249) = {248};
Line Loop(250) = {19, 144, -50, -120};
Ruled Surface(251) = {250};
Line Loop(252) = {50, 145, -56, -121};
Ruled Surface(253) = {252};
Line Loop(254) = {145, 53, -162, -51};
Ruled Surface(255) = {254};
Line Loop(256) = {51, -161, -20, 144};
Ruled Surface(257) = {256};
Line Loop(258) = {20, -160, -16, 143};
Ruled Surface(259) = {258};
Line Loop(260) = {16, -159, -28, 142};
Ruled Surface(261) = {260};
Line Loop(262) = {28, -158, -36, 141};
Ruled Surface(263) = {262};
Line Loop(264) = {36, -157, -68, 140};
Ruled Surface(265) = {264};
Line Loop(266) = {68, -156, -60, 139};
Ruled Surface(267) = {266};
Line Loop(268) = {163, 39, -166, 38};
Ruled Surface(269) = {268};
Line Loop(270) = {39, 167, 42, -164};
Ruled Surface(271) = {270};
Line Loop(272) = {42, 165, -43, -168};
Ruled Surface(273) = {272};
Line Loop(274) = {168, -44, -171, -41};
Ruled Surface(275) = {274};
Line Loop(276) = {41, -170, -40, 167};
Ruled Surface(277) = {276};
Line Loop(278) = {40, -169, -37, 166};
Ruled Surface(279) = {278};
Line Loop(280) = {163, -100, -129, 99};
Plane Surface(281) = {280};
Line Loop(282) = {100, 164, -101, -130};
Plane Surface(283) = {282};
Line Loop(284) = {101, 165, -102, -131};
Plane Surface(285) = {284};
Line Loop(286) = {171, -103, -143, 104};
Plane Surface(287) = {286};
Line Loop(288) = {104, -170, -105, 142};
Plane Surface(289) = {288};
Line Loop(290) = {105, -169, -106, 141};
Plane Surface(291) = {290};
Line(292) = {42, 33};
Line(293) = {46, 13};
Line(294) = {50, 8};
Line(295) = {37, 28};
Line Loop(296) = {295, -160, -294, 168};
Plane Surface(297) = {296};
Line Loop(298) = {294, -159, -293, 167};
Plane Surface(299) = {298};
Line Loop(300) = {293, -158, -292, 166};
Plane Surface(301) = {300};
Surface Loop(302) = {277, 289, 279, 291, 114, 269, 281, 275, 108, 273, 285, 287, 271, 283, 261, 259, 263, 217, 219, 221};
Volume(303) = {302};
Physical Volume("grille") = {303};
Surface Loop(304) = {86, 80, 197, 207, 177, 187};
Volume(305) = {304};
Surface Loop(306) = {177, 187, 197, 207, 219, 233, 247, 261, 88, 82};
Volume(307) = {306};
Physical Volume("i") = {305, 307};
Surface Loop(308) = {185, 179, 205, 199, 86, 90};
Volume(309) = {308};
Surface Loop(310) = {249, 231, 259, 221, 185, 179, 205, 199, 88, 92};
Volume(311) = {310};
Surface Loop(312) = {76, 80, 195, 209, 175, 189};
Volume(313) = {312};
Surface Loop(314) = {195, 209, 175, 189, 245, 235, 78, 82, 263, 217};
Volume(315) = {314};
Surface Loop(316) = {211, 173, 191, 193, 265, 215, 237, 243, 78, 74};
Volume(317) = {316};
Surface Loop(318) = {72, 193, 191, 173, 211, 76};
Volume(319) = {318};
Surface Loop(320) = {267, 213, 239, 241, 70, 72, 74};
Volume(321) = {320};
Physical Volume("n") = {313, 315, 317, 319, 321};
Surface Loop(322) = {181, 203, 201, 183, 94, 90};
Volume(323) = {322};
Surface Loop(324) = {203, 201, 183, 181, 257, 223, 229, 251, 96, 92};
Volume(325) = {324};
Surface Loop(326) = {225, 227, 98, 255, 253, 94, 96};
Volume(327) = {326};
Physical Volume("p") = {309, 311, 323, 325, 327};
Physical Surface("contact_grille") = {273, 275, 271, 277, 269, 279};
Physical Surface("contact_p") = {98};
Physical Surface("contact_n") = {70};
Thanks and best regards,
**************************************************************************
PLAUSSU-MONTEIL Jean-Raoul
LTM/CNRS
CEA/LETI/D2NT
17 Avenue des Martyrs
38054 Grenoble Cedex 9
e-mail: jean-raoul.plaussu at cea.fr<mailto:jean-raoul.plaussu at cea.fr>
tel: +33 (0)4 38 78 52 61
fax: +33 (0)4 38 78 58 92
secrétariat: +33 (0)4 38 78 23 28
http://www.ltm-cnrs.com<http://www.ltm-cnrs.com/>
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