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comsol 3.5 Capacitance and permittivity calculation

Hello everyone,
I 'm new to comsol and I've been trying to model a simple parallel plate capacitor with a mixture as dielectric. I wish to obtain the effective permittivity value of the mixture. Since 3.5 doesn't have capacitance calculation feature, I plan to calculate it using energy density. Then I should be able to obtain the effective permittivity value. I have completed the modeling but I don't know how to actually calculate the capacitance. Could someone please help me. The least bit of help would mean a lot to me.

1 Reply Last Post Aug 20, 2013, 7:14 AM EDT
Posted: 4 years ago Aug 20, 2013, 7:14 AM EDT
Hi,

I've never used Comsol 3.5, but I guess is similar to the next versions. Thus, if you're working in 3D, you can create a 3D plot (from Results), then in the 3D plot you create a volume plot, and in that volume plot you define the value you want to plot, e.g. the energy density. But other than plot the model variables, you can also define an equation using the variables.

I hope this helps,

Regards
Hi, I've never used Comsol 3.5, but I guess is similar to the next versions. Thus, if you're working in 3D, you can create a 3D plot (from Results), then in the 3D plot you create a volume plot, and in that volume plot you define the value you want to plot, e.g. the energy density. But other than plot the model variables, you can also define an equation using the variables. I hope this helps, Regards

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