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Commit e626bc60 authored by Denis Louis's avatar Denis Louis
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comb update

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srcs/longitudinalCombDevice.geo
+ 36
− 35
View file @ e626bc60
scale = 2e-6;
// USE WITH MINIMUM 2 FINS, else use longitudinal_comb.geo
N_fins = 7; // number of fins on one side of the comb
N_fins = 3; // number of fins on one side of the comb // MAX 12 si on change ps la longueur
// WARNING: when using more fins the pull-in voltage decreases
n = 1; // FEM elements density
nBEM = 1; // BEM elements density
// mechanical properties and boundary conditions
SetNumber("Boundary Conditions/left/ux", 0.); // encastrement
......@@ -32,7 +33,7 @@ SetNumber("Boundary Conditions/electrode_2/BEM_domain_2/dirichlet", phi_2);
SetNumber("Boundary Conditions/outside_2/BEM_domain_2/neumann", 0);
SetNumber("Materials/BEM_domain_2/Epsilon", 8.8541878128e-12); // dielectric permittivity
h_tot = 20*scale;
h_tot = 30*scale;
h_base = 0.4*scale;
h_fin = 2.8*scale;
h_space = 1*scale; // space between bout de l'electrode and base of the clamped beam of the comb
......@@ -41,7 +42,7 @@ h_fin_elec = 2.4*scale; // length of the fins of the electrode, can be longer th
//l_bord = 10*scale;
//l_tot = 34.4*scale;
l_tot = 64*scale;
l_tot = 40*scale;
l_fin = 0.8*scale;
l_space = 0.8*scale;
t_electrode = 1*scale; // width of one electrode
......@@ -52,14 +53,14 @@ l_bord = (l_tot - l_fin - (N_fins-1)*l_periodic)/2;
unit_l = 0.2*scale; // reference for the transfinite curves
// définition des points du contour
Point(1) = {0, -h_base/2, 0, 0.2*scale};
Point(2) = {0, -h_tot/2, 0, 0.2*scale};
Point(3) = {l_tot, -h_tot/2, 0, 0.2*scale};
Point(4) = {l_tot, -h_base/2, 0, 0.2*scale};
Point(5) = {l_tot, h_base/2, 0, 0.2*scale};
Point(6) = {l_tot, h_tot/2, 0, 0.2*scale};
Point(7) = {0, h_tot/2, 0, 0.2*scale};
Point(8) = {0, h_base/2, 0, 0.2*scale};
Point(1) = {0, -h_base/2, 0, nBEM*scale};
Point(2) = {0, -h_tot/2, 0, nBEM*scale};
Point(3) = {l_tot, -h_tot/2, 0, nBEM*scale};
Point(4) = {l_tot, -h_base/2, 0, nBEM*scale};
Point(5) = {l_tot, h_base/2, 0, nBEM*scale};
Point(6) = {l_tot, h_tot/2, 0, nBEM*scale};
Point(7) = {0, h_tot/2, 0, nBEM*scale};
Point(8) = {0, h_base/2, 0, nBEM*scale};
// définition des lignes du contour
Line(1) = {1, 2};
Line(2) = {2, 3};
......@@ -196,21 +197,21 @@ Physical Curve("BEM_FEM_boundary", 4) = {offsetl1:offsetl1+4*N_fins, offsetl2:of
x0_e = l_bord - l_space - t_electrode; // pour faciliter le bazar
y0_e = h_base/2 + h_space;
offsetp3 = offsetp2 + 4*N_fins;
Point(offsetp3 + 1) = {l_tot - x0_e - t_electrode, -y0_e - h_fin_elec, 0, 0.2*scale};
Point(offsetp3 + 2) = {l_tot - x0_e - t_electrode, -y0_e, 0, 0.2*scale};
Point(offsetp3 + 3) = {l_tot - x0_e, -y0_e, 0, 0.2*scale};
Point(offsetp3 + 4) = {l_tot - x0_e, -y0_e - h_fin_elec - t_electrode, 0, 0.2*scale};
Point(offsetp3 + 5) = {x0_e, -y0_e - h_fin_elec - t_electrode, 0, 0.2*scale};
Point(offsetp3 + 6) = {x0_e, -y0_e, 0, 0.2*scale};
Point(offsetp3 + 7) = {x0_e + t_electrode, -y0_e, 0, 0.2*scale};
Point(offsetp3 + 8) = {x0_e + t_electrode, -y0_e - h_fin_elec, 0, 0.2*scale};
Point(offsetp3 + 1) = {l_tot - x0_e - t_electrode, -y0_e - h_fin_elec, 0, nBEM*0.2*scale};
Point(offsetp3 + 2) = {l_tot - x0_e - t_electrode, -y0_e, 0, nBEM*0.2*scale};
Point(offsetp3 + 3) = {l_tot - x0_e, -y0_e, 0, nBEM*0.2*scale};
Point(offsetp3 + 4) = {l_tot - x0_e, -y0_e - h_fin_elec - t_electrode, 0, nBEM*0.2*scale};
Point(offsetp3 + 5) = {x0_e, -y0_e - h_fin_elec - t_electrode, 0, nBEM*0.2*scale};
Point(offsetp3 + 6) = {x0_e, -y0_e, 0, nBEM*0.2*scale};
Point(offsetp3 + 7) = {x0_e + t_electrode, -y0_e, 0, nBEM*0.2*scale};
Point(offsetp3 + 8) = {x0_e + t_electrode, -y0_e - h_fin_elec, 0, nBEM*0.2*scale};
offsetp4 = offsetp3 + 8;
For i In {1:N_fins-1}
Point(offsetp4 + 4*i - 3) = {x0_e + l_periodic*i, -y0_e - h_fin_elec, 0, 0.2*scale};
Point(offsetp4 + 4*i - 2) = {x0_e + l_periodic*i, -y0_e, 0, 0.2*scale};
Point(offsetp4 + 4*i - 1) = {x0_e + l_periodic*i + t_electrode, -y0_e, 0, 0.2*scale};
Point(offsetp4 + 4*i) = {x0_e + l_periodic*i + t_electrode, -y0_e - h_fin_elec, 0, 0.2*scale};
Point(offsetp4 + 4*i - 3) = {x0_e + l_periodic*i, -y0_e - h_fin_elec, 0, nBEM*0.2*scale};
Point(offsetp4 + 4*i - 2) = {x0_e + l_periodic*i, -y0_e, 0, nBEM*0.2*scale};
Point(offsetp4 + 4*i - 1) = {x0_e + l_periodic*i + t_electrode, -y0_e, 0, nBEM*0.2*scale};
Point(offsetp4 + 4*i) = {x0_e + l_periodic*i + t_electrode, -y0_e - h_fin_elec, 0, nBEM*0.2*scale};
EndFor
// définition des lignes générales (indépendantes de N_fins) de la bottom electrode
......@@ -249,21 +250,21 @@ Physical Curve("outside_1", 8) = {1, 2, 3};
// définition des points de la top electrode
offsetp5 = offsetp4 + 4*(N_fins-1);
Point(offsetp5 + 1) = {x0_e + t_electrode, y0_e + h_fin_elec, 0, 0.2*scale};
Point(offsetp5 + 2) = {x0_e + t_electrode, y0_e, 0, 0.2*scale};
Point(offsetp5 + 3) = {x0_e, y0_e, 0, 0.2*scale};
Point(offsetp5 + 4) = {x0_e, y0_e + h_fin_elec + t_electrode, 0, 0.2*scale};
Point(offsetp5 + 5) = {l_tot - x0_e, y0_e + h_fin_elec + t_electrode, 0, 0.2*scale};
Point(offsetp5 + 6) = {l_tot - x0_e, y0_e, 0, 0.2*scale};
Point(offsetp5 + 7) = {l_tot - x0_e - t_electrode, y0_e, 0, 0.2*scale};
Point(offsetp5 + 8) = {l_tot - x0_e - t_electrode, y0_e + h_fin_elec, 0, 0.2*scale};
Point(offsetp5 + 1) = {x0_e + t_electrode, y0_e + h_fin_elec, 0, nBEM*0.2*scale};
Point(offsetp5 + 2) = {x0_e + t_electrode, y0_e, 0, nBEM*0.2*scale};
Point(offsetp5 + 3) = {x0_e, y0_e, 0, nBEM*0.2*scale};
Point(offsetp5 + 4) = {x0_e, y0_e + h_fin_elec + t_electrode, 0, nBEM*0.2*scale};
Point(offsetp5 + 5) = {l_tot - x0_e, y0_e + h_fin_elec + t_electrode, 0, nBEM*0.2*scale};
Point(offsetp5 + 6) = {l_tot - x0_e, y0_e, 0, nBEM*0.2*scale};
Point(offsetp5 + 7) = {l_tot - x0_e - t_electrode, y0_e, 0, nBEM*0.2*scale};
Point(offsetp5 + 8) = {l_tot - x0_e - t_electrode, y0_e + h_fin_elec, 0, nBEM*0.2*scale};
offsetp6 = offsetp5 + 8;
For i In {1:N_fins-1}
Point(offsetp6 + 4*i - 3) = {x0_e + l_periodic*i, y0_e + h_fin_elec, 0, 0.2*scale};
Point(offsetp6 + 4*i - 2) = {x0_e + l_periodic*i, y0_e, 0, 0.2*scale};
Point(offsetp6 + 4*i - 1) = {x0_e + l_periodic*i + t_electrode, y0_e, 0, 0.2*scale};
Point(offsetp6 + 4*i) = {x0_e + l_periodic*i + t_electrode, y0_e + h_fin_elec, 0, 0.2*scale};
Point(offsetp6 + 4*i - 3) = {x0_e + l_periodic*i, y0_e + h_fin_elec, 0, nBEM*0.2*scale};
Point(offsetp6 + 4*i - 2) = {x0_e + l_periodic*i, y0_e, 0, nBEM*0.2*scale};
Point(offsetp6 + 4*i - 1) = {x0_e + l_periodic*i + t_electrode, y0_e, 0, nBEM*0.2*scale};
Point(offsetp6 + 4*i) = {x0_e + l_periodic*i + t_electrode, y0_e + h_fin_elec, 0, nBEM*0.2*scale};
EndFor
// définition des lignes générales (indépendantes de N_fins) de la top electrode
......
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