CAE Software【Femtet】Murata Software Co., Ltd.
The capacitor analyzed in this exercise consists of two parallel conductive plates which have the potential difference.
The capacitance, the electric field, and the equipotential map are solved.
Unless specified in the list below, the default conditions will be applied.
Item |
Settings |
Analysis Space |
3D |
Model unit |
mm |
Select “Static analysis” as the potential is static.
Item |
Settings |
Solvers |
Electric Field Analysis [Coulomb] |
Analysis Type |
Static analysis |
Material Type |
Dielectric material |
Options |
N/A |
The electric field exists outside the analysis region. Therefore the open boundary condition below is applied initially.
Tab |
Setting Item |
Settings |
Open Boundary Tab |
Type |
Absorbing boundary |
Order of Absorbing Boundary |
1st degree |
Create 2 sheet bodies for electrodes. Then, specify the voltage on each as boundary condition.
Two sheet bodies are not the physical entity. They are used just to imprint the voltage-specified boundary condition.
They are called “imprinting body”.
You don’t need to set the body attribute or the material property on them.
Body Number/Type |
Body Attribute Name |
Material Name |
1/Sheet |
Imprinting body |
|
2/Sheet |
Imprinting body |
|
* Available from the Material DB
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
Electrode1/Face |
Electric |
Electric wall |
Voltage specified, -1[V] |
Electrode2/Face |
Electric |
Electric wall |
Voltage specified, +1[V] |
Outer Boundary Condition * |
Electric |
Open boundary |
To set Outer Boundary Condition, go to the [Model] tab
and click [Outer Boundary Condition] .
To see the calculation results, go to the [Results] tab
and click [Table] .
The vectors of the electric field are shown below.
The electric field is generated between two plates.
The gradation contour of the voltage on the XZ section is shown below.
The distributed voltage around the electrodes is visually shown.