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What do you want it to look like?

Hi Jeff

The image attached would be the final geometry I hope to have. I would like to create 4 strips to attach on each quadrant for simulations purpose. Dimension are 1m length, thickness 0.1m

Thanks!

Hi Ian,

Let's start with the case where you don't need the traces to have a finite thickness.

In that case, you can intersect the radome with a block chosen so that its intersection with the radome creates the strip you need, then remove the block.

If you do need the traces to have a finite thickness, presumably perpendicular to the radome, you do the same as above and then use a thickening operation. This last step requires the Design Module.

Best,

Jeff

PS: See my post in this old thread for the first case and the attached file for the second case.

Hi Jeff

Thanks for the advice! It was very helpful! Unfortunately, I could not open the modified mph file so I looked at the old version instead.

One last question, do you have any recommendation/advice for simulating electrostatics (potential, field) for 3D geometry? I tried creating electrodes and defined it as floating potential, ground at the bottom (screenshot attached) but nothing is happening. Do I need additional boundaries to simulate?

Thanks!

Ian,

If some boundaries are grounded, some boundaries are set to floating potential, and the remaning boundaries are zero charge, then the solution to the problem is voltage equals zero everywhere (I figure this is what you mean by "nothing is happening"), so not a very interesting set up. Maybe you meant to impose a (non-zero) potential at the boundaries that you made floating potential?

It's quite possible I am not understanding you correctly. If your difficulties persist, I'd encourage you to work through one or two tutorials on electrostatics in the Application Gallery.

Best, Jeff

Hi Ian,

Let's start with the case where you don't need the traces to have a finite thickness.

In that case, you can intersect the radome with a block chosen so that its intersection with the radome creates the strip you need, then remove the block.

If you do need the traces to have a finite thickness, presumably perpendicular to the radome, you do the same as above and then use a thickening operation. This last step requires the Design Module.

Best,

Jeff

PS: See my post in this old thread for the first case and the attached file for the second case.

Hi Jeff,

I have thicken the strip and want it lying on the surface of the sphere but am not successful. Is there a way to heighten the strips without compromising the geometry design?

Could you show me an example with version 5.4 ? As I could not open your attached mph file with an outdated version.

Attached is my mph file of my model. Maybe you could use my file as an example. V1 is an updated model for better visualisation with thicken strips. However, I could not make the strips lie on the surface of the outer sphere for this model.

Thanks!

Ian

Hello Ian,

It sounds like the license you are using does not include the Design Module. The Design Module is an optional add-on product. You can check whether your license includes that product by going to File > Licensed and Used Products.

In any case, I do not have version 5.4 any longer. I would encourage you to update your installation to the current version, for which I'll mention in passing that you'll get better support than for an older version, whether that's under a support contract from COMSOL's official support service or from other users in the Discussion Forum.

Best,

Jeff