Discussion Forum

Hi everyone,

I am using the Java API with Comsol and I really like it's abilities overall. I would like to be able to (in a for loop) create a 3D geometrical object (a cylinder) and then make that cylinder into it's own entity. This would be much like if you were to in the GUI create a cylinder, create an Explicit Entity, Change the geometric entity level to "Domain," click on the cylinder, then right click to select that domain, then change Output Entities to Adjacent Boundaries with either Exterior or Interior boundaries selected. Then create a Floating Potential, or really any other Boundary Condition, then set that Boundary Condition to be set to the Entity that was just made.

Here are some lines of the code:

model.geom("geom1").feature().create("cyl1", "Cylinder"); //creates the cylinder
model.geom("geom1").feature("cyl1").set("pos", new String[]{"0", "0", "0"}); // sets position
model.geom("geom1").feature("cyl1").set("h", "length"); // sets the length of the cylinder

model.selection().create("sel1", "Explicit");
model.selection("sel1").geom("geom1", 3, 2, new String[]{"exterior", "interior"});
model.selection("sel1").set(new int[]{5}); // HOW DO YOU FIGURE OUT WHAT DOMAIN TO PUT HERE.

// later in the code:
model.physics("ec").feature().create("fp1", "FloatingPotential", 2);
model.physics("ec").feature("fp1").selection().named("sel1");


Hopefully you got a pretty good idea of what I'm trying to accomplish above. Just trying to be able to find out what domain number "cyl1" is in this case. Eventually, this will be implemented into a code with 100-10000 cylinders and an individual floating potential can be assigned to each cylinder.

Thanks in advance for your help,
John