COMSOL Multiphysics™

mesh2geom
fem.mesh=meshinit(rect2);
Create an analyzed geometry from the mesh, into the new geometry Geom2.
xfem=mesh2geom(fem,'destfem',2);
Creating an Analyzed Geometry From a Deformed Mesh
Draw two rectangles, one inside the other, and mesh
clear fem
g1=rect2(1.8,1.2,'base','corner','pos',[-0.8,-0.8]);
g2=rect2(0.2,0.4,'base','corner','pos',[-0.2,-0.4]);
fem.geom=geomcsg({g1,g2});
fem.mesh=meshinit(fem);
Set the inner rectangle to move along the x-axis.
clear appl
appl.mode.class = 'MovingMesh';
appl.sdim = {'X','Y','Z'};
appl.assignsuffix = '_ale';
appl.prop.analysis='transient';
appl.prop.weakconstr.value = 'off';
appl.bnd.defflag = {{1;1}};
appl.bnd.deform = {{0;0},{'t';0}};
appl.bnd.ind = [1,1,1,2,2,2,2,1];
appl.equ.type = {'free','pres'};
appl.equ.presexpr = {{0;0},{'t';0}};
appl.equ.ind = [1,2];
fem.appl{1} = appl;
fem.sdim = {{'X','Y'},{'x','y'}};
fem.frame = {'ref','ale'};
fem=multiphysics(fem);
fem.xmesh=meshextend(fem);
Solve the problem:
fem.sol=femtime(fem,'tlist',[0:0.01:0.1]);
Create an analyzed geometry from the deformed mesh.
fem=mesh2geom(fem,'srcdata','deformed','frame','ale');
Remesh the created geometry and continue solving.
fem.mesh=meshinit(fem);
fem.xmesh=meshextend(fem);
fem.sol=femtime(fem,'tlist',[0:0.01:0.1]);
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