With the default algorithm evrything looks ok to me (don't use -algo front3d unless you really have to).
> On 9 May 2018, at 17:12, Harris FAROOQ <harris.far...@mines-paristech.fr> > wrote: > > Hello, > > I am trying to get a uniform element size throughout the geometry. I have > tried giving a constant value to element size and mesh "mesh size fields" but > they do not work i.e. I get a uniform mesh at the boundary but inside the > geometry, the elements are coarse. > > I have also attached an image to clarify the problem. > > I have also tried: > -algo front3d -3 > > or > > -algo front3d -3 -optimize_netgen > but these options do not give a uniform mesh inside the geometry. > > Is it possible to get a uniform mesh size throughout the geometry? > > My geo file looks like this: > > Point(1) ={0.315650761382760, 0.894382926819093, -0.302448630706616, > 0.100000000000000}; > Point(2) ={1.298440033476073, 1.362940371711625, 0.283099223758606, > 0.100000000000000}; > Point(3) ={1.298440033476073, 0.894382926819093, -0.262655810088256, > 0.100000000000000}; > Point(4) ={0.735232865266709, 1.411647357936784, 0.283099223758606, > 0.100000000000000}; > Point(5) ={0.340187717154710, 1.411647357936784, 0.311264675576753, > 0.100000000000000}; > Point(6) ={0.298440033476073, 0.457103015216639, 0.283099223758606, > 0.100000000000000}; > Point(7) ={0.903394885364074, 0.894382926819093, 0.697551369293384, > 0.100000000000000}; > Point(8) ={1.298440033476073, 0.894382926819093, 0.669385917475237, > 0.100000000000000}; > Point(9) ={0.340187717154710, 0.848927269539238, 0.697551369293384, > 0.100000000000000}; > Point(10) ={0.340187717154709, 0.411647357936784, 0.243306403140246, > 0.100000000000000}; > Point(11) ={0.735232865266709, 0.411647357936784, 0.283099223758606, > 0.100000000000000}; > Point(12) ={1.298440033476073, 0.457103015216640, 0.283099223758606, > 0.100000000000000}; > Point(13) ={0.903394885364074, 0.894382926819093, -0.302448630706616, > 0.100000000000000}; > Point(14) ={0.298440033476073, 0.894382926819093, -0.262655810088257, > 0.100000000000000}; > Point(15) ={0.322976989248022, 1.411647357936784, 0.283099223758606, > 0.100000000000000}; > Point(16) ={0.340187717154710, 0.943089913044252, 0.697551369293384, > 0.100000000000000}; > Point(17) ={0.315650761382760, 0.894382926819093, 0.697551369293384, > 0.100000000000000}; > Point(18) ={0.340187717154709, 0.848927269539238, -0.302448630706616, > 0.100000000000000}; > Point(19) ={0.322976989248022, 0.411647357936784, 0.283099223758606, > 0.100000000000000}; > Point(20) ={0.340187717154710, 0.411647357936784, 0.311264675576753, > 0.100000000000000}; > Point(21) ={0.340187717154709, 1.411647357936784, 0.243306403140246, > 0.100000000000000}; > Point(22) ={0.340187717154709, 0.943089913044252, -0.302448630706616, > 0.100000000000000}; > Point(23) ={0.298440033476073, 1.362940371711625, 0.283099223758606, > 0.100000000000000}; > Point(24) ={0.298440033476073, 0.894382926819093, 0.669385917475237, > 0.100000000000000}; > Point(25) ={0.340187717154710, -0.056910086955748, 0.697551369293384, > 0.100000000000000}; > Point(26) ={0.903394885364075, -0.105617073180907, 0.697551369293384, > 0.100000000000000}; > Point(27) ={1.322976989248022, 0.411647357936784, 1.283099223758606, > 0.100000000000000}; > Point(28) ={1.298440033476073, 0.362940371711625, 1.283099223758606, > 0.100000000000000}; > Point(29) ={0.340187717154710, 0.411647357936784, 1.243306403140246, > 0.100000000000000}; > Point(30) ={1.298440033476073, 0.457103015216639, 1.283099223758606, > 0.100000000000000}; > Point(31) ={1.340187717154710, -0.056910086955748, 0.697551369293384, > 0.100000000000000}; > Point(32) ={1.315650761382761, 0.894382926819093, 0.697551369293384, > 0.100000000000000}; > Point(33) ={0.735232865266709, 0.411647357936784, 1.283099223758606, > 0.100000000000000}; > Point(34) ={1.298440033476073, 0.894382926819093, 0.737344189911744, > 0.100000000000000}; > Point(35) ={1.298440033476074, -0.105617073180907, 0.737344189911744, > 0.100000000000000}; > Point(36) ={1.298440033476073, 0.362940371711625, 0.283099223758606, > 0.100000000000000}; > Point(37) ={1.315650761382761, -0.105617073180907, 0.697551369293384, > 0.100000000000000}; > Point(38) ={1.298440033476073, -0.105617073180907, 0.669385917475237, > 0.100000000000000}; > Point(39) ={1.340187717154710, 0.411647357936784, 1.243306403140246, > 0.100000000000000}; > Point(40) ={1.322976989248022, 0.411647357936784, 0.283099223758606, > 0.100000000000000}; > Point(41) ={1.340187717154710, 0.848927269539238, 0.697551369293384, > 0.100000000000000}; > Point(42) ={1.340187717154710, 0.411647357936784, 0.311264675576753, > 0.100000000000000}; > Line(1) = {2, 3}; > Line(2) = {3, 12}; > Line(3) = {12, 8}; > Line(4) = {8, 2}; > Line(5) = {2, 4}; > Line(6) = {4, 21}; > Line(7) = {21, 22}; > Line(8) = {22, 13}; > Line(9) = {13, 3}; > Line(10) = {8, 7}; > Line(11) = {7, 16}; > Line(12) = {16, 5}; > Line(13) = {5, 4}; > Line(14) = {13, 18}; > Line(15) = {18, 10}; > Line(16) = {10, 11}; > Line(17) = {11, 12}; > Line(18) = {5, 15}; > Line(19) = {15, 21}; > Line(20) = {16, 17}; > Line(21) = {17, 24}; > Line(22) = {24, 23}; > Line(23) = {23, 15}; > Line(24) = {6, 24}; > Line(25) = {17, 9}; > Line(26) = {9, 20}; > Line(27) = {20, 19}; > Line(28) = {19, 6}; > Line(29) = {6, 14}; > Line(30) = {14, 23}; > Line(31) = {19, 10}; > Line(32) = {18, 1}; > Line(33) = {1, 14}; > Line(34) = {7, 9}; > Line(35) = {11, 20}; > Line(36) = {22, 1}; > Line(37) = {26, 35}; > Line(38) = {35, 37}; > Line(39) = {37, 38}; > Line(40) = {38, 26}; > Line(41) = {26, 25}; > Line(42) = {25, 29}; > Line(43) = {29, 33}; > Line(44) = {33, 28}; > Line(45) = {28, 35}; > Line(46) = {38, 36}; > Line(47) = {36, 11}; > Line(48) = {20, 25}; > Line(49) = {27, 30}; > Line(50) = {30, 34}; > Line(51) = {34, 32}; > Line(52) = {32, 41}; > Line(53) = {41, 39}; > Line(54) = {39, 27}; > Line(55) = {27, 28}; > Line(56) = {33, 30}; > Line(57) = {39, 31}; > Line(58) = {31, 37}; > Line(59) = {36, 40}; > Line(60) = {40, 12}; > Line(61) = {40, 42}; > Line(62) = {42, 41}; > Line(63) = {32, 8}; > Line(64) = {34, 7}; > Line(65) = {9, 29}; > Line(66) = {31, 42}; > Line Loop(67) = {1, 2, 3, 4}; > Plane Surface(1) = {67}; > Line Loop(68) = {5, 6, 7, 8, 9, -1}; > Plane Surface(2) = {68}; > Line Loop(69) = {-4, 10, 11, 12, 13, -5}; > Plane Surface(3) = {69}; > Line Loop(70) = {-9, 14, 15, 16, 17, -2}; > Plane Surface(4) = {70}; > Line Loop(71) = {-13, 18, 19, -6}; > Plane Surface(5) = {71}; > Line Loop(72) = {-12, 20, 21, 22, 23, -18}; > Plane Surface(6) = {72}; > Line Loop(73) = {24, -21, 25, 26, 27, 28}; > Plane Surface(7) = {73}; > Line Loop(74) = {29, 30, -22, -24}; > Plane Surface(8) = {74}; > Line Loop(75) = {-28, 31, -15, 32, 33, -29}; > Plane Surface(9) = {75}; > Line Loop(76) = {34, -25, -20, -11}; > Plane Surface(10) = {76}; > Line Loop(77) = {-10, -3, -17, 35, -26, -34}; > Plane Surface(11) = {77}; > Line Loop(78) = {-31, -27, -35, -16}; > Plane Surface(12) = {78}; > Line Loop(79) = {-8, 36, -32, -14}; > Plane Surface(13) = {79}; > Line Loop(80) = {-33, -36, -7, -19, -23, -30}; > Plane Surface(14) = {80}; > Line Loop(81) = {37, 38, 39, 40}; > Plane Surface(15) = {81}; > Line Loop(82) = {41, 42, 43, 44, 45, -37}; > Plane Surface(16) = {82}; > Line Loop(83) = {-40, 46, 47, 35, 48, -41}; > Plane Surface(17) = {83}; > Line Loop(84) = {49, 50, 51, 52, 53, 54}; > Plane Surface(18) = {84}; > Line Loop(85) = {55, -44, 56, -49}; > Plane Surface(19) = {85}; > Line Loop(86) = {-54, 57, 58, -38, -45, -55}; > Plane Surface(20) = {86}; > Line Loop(87) = {-47, 59, 60, -17}; > Plane Surface(21) = {87}; > Line Loop(88) = {-3, -60, 61, 62, -52, 63}; > Plane Surface(22) = {88}; > Line Loop(89) = {-63, -51, 64, -10}; > Plane Surface(23) = {89}; > Line Loop(90) = {-42, -48, -26, 65}; > Plane Surface(24) = {90}; > Line Loop(91) = {-65, -34, -64, -50, -56, -43}; > Plane Surface(25) = {91}; > Line Loop(92) = {66, -61, -59, -46, -39, -58}; > Plane Surface(26) = {92}; > Line Loop(93) = {-57, -53, -62, -66}; > Plane Surface(27) = {93}; > Surface Loop(29) = {1,2,3,4,5,6,7,8,9,10,11,12,13,14}; > Volume(1)={29}; > Physical Volume(1)={1}; > Surface Loop(30) = {15,16,17,18,19,20,11,21,22,23,24,25,26,27}; > Volume(2)={30}; > Physical Volume(2)={2}; > Periodic Surface 1 {1,2,3,4} = 8 {-30,-29,24,22}; > Periodic Surface 2 {5,6,7,8,9,-1} = 3 {5,-13,-12,-11,-10,4}; > Periodic Surface 2 {5,6,7,8,9,-1} = 4 {-17,-16,-15,-14,9,2}; > Periodic Surface 2 {5,6,7,8,9,-1} = 14 {23,19,7,36,33,30}; > Periodic Surface 3 {-4,10,11,12,13,-5} = 6 {-22,-21,-20,12,18,-23}; > Periodic Surface 3 {-4,10,11,12,13,-5} = 11 {3,10,34,26,-35,17}; > Periodic Surface 3 {-4,10,11,12,13,-5} = 17 {-46,40,41,-48,-35,-47}; > Periodic Surface 4 {-9,14,15,16,17,-2} = 9 {-33,-32,15,-31,28,29}; > Periodic Surface 4 {-9,14,15,16,17,-2} = 11 {10,34,26,-35,17,3}; > Periodic Surface 4 {-9,14,15,16,17,-2} = 25 {64,34,65,43,56,50}; > Periodic Surface 5 {-13,18,19,-6} = 12 {35,27,31,16}; > Periodic Surface 6 {-12,20,21,22,23,-18} = 7 {-26,-25,21,-24,-28,-27}; > Periodic Surface 6 {-12,20,21,22,23,-18} = 14 {7,36,33,30,23,19}; > Periodic Surface 7 {24,-21,25,26,27,28} = 9 {29,-33,-32,15,-31,28}; > Periodic Surface 7 {24,-21,25,26,27,28} = 11 {3,10,34,26,-35,17}; > Periodic Surface 7 {24,-21,25,26,27,28} = 22 {3,-63,52,-62,-61,60}; > Periodic Surface 9 {-28,31,-15,32,33,-29} = 14 {23,19,7,36,33,30}; > Periodic Surface 10 {34,-25,-20,-11} = 13 {14,32,-36,8}; > Periodic Surface 11 {-10,-3,-17,35,-26,-34} = 17 {40,-46,-47,-35,-48,41}; > Periodic Surface 11 {-10,-3,-17,35,-26,-34} = 22 {-63,3,60,-61,-62,52}; > Periodic Surface 11 {-10,-3,-17,35,-26,-34} = 25 {64,50,56,43,65,34}; > Periodic Surface 15 {37,38,39,40} = 23 {-64,51,63,10}; > Periodic Surface 16 {41,42,43,44,45,-37} = 17 {41,-48,-35,-47,-46,40}; > Periodic Surface 16 {41,42,43,44,45,-37} = 20 {-58,-57,54,55,45,38}; > Periodic Surface 16 {41,42,43,44,45,-37} = 25 {34,65,43,56,50,64}; > Periodic Surface 17 {-40,46,47,35,48,-41} = 26 {39,46,59,61,-66,58}; > Periodic Surface 18 {49,50,51,52,53,54} = 20 {55,45,38,-58,-57,54}; > Periodic Surface 18 {49,50,51,52,53,54} = 22 {60,3,-63,52,-62,-61}; > Periodic Surface 18 {49,50,51,52,53,54} = 25 {56,50,64,34,65,43}; > Periodic Surface 19 {55,-44,56,-49} = 21 {-59,47,17,-60}; > Periodic Surface 20 {-54,57,58,-38,-45,-55} = 26 {61,-66,58,39,46,59}; > Periodic Surface 22 {-3,-60,61,62,-52,63} = 26 {46,59,61,-66,58,39}; > Periodic Surface 24 {-42,-48,-26,65} = 27 {57,66,62,53}; > > > Best regards, > Harris Farooq > <mesh.png>_______________________________________________ > gmsh mailing list > gmsh@onelab.info > http://onelab.info/mailman/listinfo/gmsh
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