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Calculation of electrostatic forces
Posted Oct 15, 2012, 10:53 p.m. EDT Version 3.5a 1 Reply
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Dear all,
I have a querry regarding electrostatic force calculations in comsol 3.5(a). According to the manuals and few tutorials on calculation of electrostatic forces in MEMS module, it seems to me that we can only calculate the electrostatic forces on boundaries of the computational domain (i.e. they are boudary variables only). If in case I want to calculate the electrostatic forces inside a particular subdomain (as a body force N/m^3) what should I do???
If any one of u out there has ever tried to calculate this, I would really appreciate his/her cooperation.
Thanks in advance
I have a querry regarding electrostatic force calculations in comsol 3.5(a). According to the manuals and few tutorials on calculation of electrostatic forces in MEMS module, it seems to me that we can only calculate the electrostatic forces on boundaries of the computational domain (i.e. they are boudary variables only). If in case I want to calculate the electrostatic forces inside a particular subdomain (as a body force N/m^3) what should I do???
If any one of u out there has ever tried to calculate this, I would really appreciate his/her cooperation.
Thanks in advance
1 Reply Last Post Oct 16, 2012, 10:40 a.m. EDT
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Posted:
1 decade ago
Hi
I do not believe it works, as the forces ()via Maxwell stress tensors are defined as integration over boundaries of the gradient of the fields (measured from within a single material), preference air or "vacuum"
And I do not believe this is version dependent. Then another way is over virtual work integration ? that is described somewhere if I remember right, heavier to set up
--
Good luck
Ivar
I do not believe it works, as the forces ()via Maxwell stress tensors are defined as integration over boundaries of the gradient of the fields (measured from within a single material), preference air or "vacuum"
And I do not believe this is version dependent. Then another way is over virtual work integration ? that is described somewhere if I remember right, heavier to set up
--
Good luck
Ivar