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Boundary conditions in COMSOL 4.2a
Posted 05.07.2012, 19:00 GMT-4 MEMS & Nanotechnology, MEMS & Piezoelectric Devices Version 4.2a 2 Replies
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In the MES module (EMI) the boundary conditions chargue zero. Is the total chargue zero? Or no exist chargues?
I'm using a dielectric material in my model and need polarized of the dipole of the material.
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check the underlaying equations, most BC applies to the field element value that is its locally "0", except for lumoed BC cases where the integrated value is "0"
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Good luck
Ivar
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With reference to attach file, consider a dielectric mass with two electrodes fixed to its surface. This construction is held at some small distance from a second dielectric mass which we wish to control. Imagine two molecules in the target dielectric placed symmetrically about the mid plane of the diagram. Creating a potential difference across the electrodes gives rise to a fringing field which polarises these molecules. Since the electric field is non-uniform the forces acting on the the positive and negative charges are not quite collinear leading to a resultant force on each molecule F1, F2. By symmetry the total force on the pair of molecules F1 + F2 is downward (negative z direction).
The problem is that I do not get the mass movement. i'm checking the boundary conditions, but no obtain movement.
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