combining geometries in pde toolbox, multicylinders

Hi, I am trying to combine 2 cylinders together but encountered the following error:

Here are the 2 shapes I am trying to combine:

and here is my codes:

electrode = multicylinder([1,4,4.5], 0.1, "Void",[0,1,0]);
skin = multicylinder(width, [hSC hLE hDE hAT], "Zoffset", [-hSC -hSC-hLE -hSC-hLE-hDE -hSC-hLE-hDE-hAT]);

skinmodel = addCell(electrode, skin);

model = createpde("electromagnetic", "electrostatic");
model.Geometry = skin;
pdegplot(model,"CellLabels","on")

the error occered at the skinmodel line.

May I know how to fix it? Or is there another way to do it? I am trying to combine the shapes and use it in PDE toolbox.

Thanks!

Answer 1

[Hans Ruder]

Hi,

try to draw your structure with "extrude"-command. First draw in 2D the different circles, then extrude in z-direction. You will get more cells than needed, but you can assign them identical properties.

Hope this helps.

[Bastiaan]

can you elaborate with an easy example? i am trying to combine two cylinders on top of each other. both cylinders have a different decgs....

[Hans Ruder]

You can find an example in Partial Differential Equation Toolbox User's Guide, Chaper 5 Functions, extrude.