﻿ Parallel-Plate Dielectric CapacitorExamples | Product | Murata Software Co., Ltd.

# Example2Parallel-Plate Dielectric Capacitor

### General

• The capacitor analyzed in this exercise 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.

### Analysis Space

 Item Settings Analysis Space 3D Model unit mm

### Analysis Conditions

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 domain. 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

### Model

Create a cubic solid body for the dielectric capacitor.

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

### Body Attributes and Materials

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 Conditions

 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] .

### Results

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.

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