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Example 2: Parallel-Plate Dielectric Capacitor

The capacitor analyzed in this example consists of two parallel conductive plates with an alumina block placed between them.
The capacitance, the electric field, and the equipotential map are solved.
Unless specified in the list below, the default conditions will be applied.

Select "Static analysis" as the potential is static.

Item	Settings
Solver	Electric Analysis [Coulomb]
Analysis Type	Static Analysis (Capacitance)
Options	N/A

The electric field exists outside the analysis domain. Therefore the open boundary condition below is applied initially.

Create a cubic solid body for the dielectric capacitor.

Set the boundary condition of the electric potential on the top and bottom faces of the capacitor.

A block of alumina is defined.

Body Number/Type	Body Attribute Name	Material Name
1/Solid	Block	001_Alumina *

* Available from the material DB

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
Electrode1/Face	Electric	Electric Wall	Electric Potential Specified -1 [V]
Electrode2/Face	Electric	Electric Wall	Electric Potential 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 electrodes.

The vectors of the electric flux density are shown below.

The electric flux density is concentrated in the alumina block.