[Gmsh] gmsh - mesh set by Field Threshold does not increase in size as expected

Adam_K · November 6, 2018, 05:31

I would like to have a higher mesh density in/around some cylinders that are dispersed within a matrix. When I only have one cylinder present, the results are as expected; the element sizes increase away from the cylinder. However, when multiple cylinders are present, this is not the case.

Code:

R = 10;
LC = 50;

Field[1] = Distance;
Field[1].NNodesByEdge =40;
Field[1].EdgesList = {CircleIndex[]};

Field[2] = Threshold;
Field[2].IField = 1;
Field[2].LcMin = R/5;
Field[2].LcMax = LC;
Field[2].DistMin = 2*R;
Field[2].DistMax = 5*R;

Background Field = 2;

Adam_K · November 11, 2018, 23:40

I figured it out.

Options > Mesh > Advanced

Uncheck "Extend element sizes from boundary"

November 6, 2018, 05:31	gmsh - mesh set by Field Threshold does not increase in size as expected	#1
Adam_K Member Adam Join Date: Nov 2018 Posts: 36 Rep Power: 7	I would like to have a higher mesh density in/around some cylinders that are dispersed within a matrix. When I only have one cylinder present, the results are as expected; the element sizes increase away from the cylinder. However, when multiple cylinders are present, this is not the case. Code: R = 10; LC = 50; Field[1] = Distance; Field[1].NNodesByEdge =40; Field[1].EdgesList = {CircleIndex[]}; Field[2] = Threshold; Field[2].IField = 1; Field[2].LcMin = R/5; Field[2].LcMax = LC; Field[2].DistMin = 2R; Field[2].DistMax = 5R; Background Field = 2;

November 11, 2018, 23:40	nevermind	#2
Adam_K Member Adam Join Date: Nov 2018 Posts: 36 Rep Power: 7	I figured it out. Options > Mesh > Advanced Uncheck "Extend element sizes from boundary"

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