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variable radius of a circle (or sphere)

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hello,
I would like to simulate an object that changes every second, such as a circle (or sphere) radius changes every second. I want to swing the beam between two values ​​in a periodical.
How can I do?
Thanks for your help!

Chiara

0 Replies Last Post Sep 7, 2011, 11:39 a.m. EDT
COMSOL Moderator

Hello Chiman

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