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 FasterCap and FastCap2
 Capacitance between 2 square capacitors
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Muhammad

Mauritius
9 Posts

Posted - Jul 25 2022 :  05:47:29  Show Profile  Reply with Quote
quote:
Originally posted by Muhammad

Hello Enrico,
I have been able to write my own algorithm, but now I am having problems to include 2 permittivities (an inner and an outer one) in my system of capacitors. Below is my algorithm:

* Capacitance matrix of glass plate capacitor 0.28x0.28x0.006 m
*
C passive.txt 1.0 0.00 0.00 0.000 0x99000055
*
C active.txt 1.0 0.07 0.07 0.10 0x100000ff
*
C active.txt 1.0 0.07 0.07 0.006 0x100000ff
*
C passive.txt 1.0 0.00 0.00 0.106 0x99000055

D glplate.txt 1.0 1.0 0.0 0.0 0.00 0.01 0.01 0.001

D glplate.txt 1.0 1.0 0.0 0.0 0.10 0.01 0.01 0.101

Regards,
Zoubayr



Dear Enrico,
Could you please help me? I really need to know how to add the values of the permittivities in my algorithm.

Regards,
Zoubayr
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Enrico

482 Posts

Posted - Jul 25 2022 :  11:17:32  Show Profile  Reply with Quote
Hi Zoubayr,

FastCap/FasterCap do not support D elements with different permittivities on the two sides, i.e. infinitely thin conductors in contact with different materials.


FastCap/FasterCap always assume that the conductors are 3D. So you must use a conductor with thickness, that is a box, however thin, composed by panels each of which can be in contact with a different material (e.g. top different from bottom).

You can find some examples in the 'Samples' directory when you install the FastFieldSolvers bundle on Windows. For the location of the directory, if not found, you can see the embedded online help of FasterCap.

Best Regards
Enrico

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