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Force per unit length or area
Posted Nov 11, 2015, 6:13 a.m. EST RF & Microwave Engineering, Structural Mechanics Version 5.0 2 Replies
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Dear all
From a solution of 2D structure I get Maxwell stress tensor over a boundary, which I further want to apply, in a separate problem but on the same 2D structure and boundary, (using solid mechanics) as boundary load.
What I'm not sure is that: to apply this force distribution ''per unit length'' or ''per unit area''?
Cheers,
Can
From a solution of 2D structure I get Maxwell stress tensor over a boundary, which I further want to apply, in a separate problem but on the same 2D structure and boundary, (using solid mechanics) as boundary load.
What I'm not sure is that: to apply this force distribution ''per unit length'' or ''per unit area''?
Cheers,
Can
2 Replies Last Post Nov 12, 2015, 2:33 a.m. EST
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Posted:
9 years ago
Hi
check the units of your variable from the first "physics" the you will know ;)
Normally by default COMSOL works in densities per volume on Domains, per surface over Boundaries, but then in 2D and 1D respectively you need to correct for the loss of one dimension, generally in 2D its per "1m" depth, and in 1D per 1m^2 normal area for input, but the output results remain mostly as densities similar to 3D (there are some exceptions).
That is why it is so handy that COMSOL is systematic with units, provided you have been systematic by entering the units too ;)
--
Good luck
Ivar
check the units of your variable from the first "physics" the you will know ;)
Normally by default COMSOL works in densities per volume on Domains, per surface over Boundaries, but then in 2D and 1D respectively you need to correct for the loss of one dimension, generally in 2D its per "1m" depth, and in 1D per 1m^2 normal area for input, but the output results remain mostly as densities similar to 3D (there are some exceptions).
That is why it is so handy that COMSOL is systematic with units, provided you have been systematic by entering the units too ;)
--
Good luck
Ivar
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Posted:
9 years ago
Hi Ivar,
Thanks for reminding, I agree that sometimes I confuse more than I need :)
Cheers,
Can
Thanks for reminding, I agree that sometimes I confuse more than I need :)
Cheers,
Can