Example7 Electrostatic Forces Applied on Dielectric Material

General

• In this exercise, an alumina block is inserted in the parallel plates which have the potential difference.
   

• The electrostatic forces applied on the alumina block and the electric field are solved.
   

• Unless specified in the list below, the default conditions will be applied.
   

Analysis Space

Analysis Conditions

Select “Static analysis” as the potential is static.

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

Model

Create 2 sheet bodies for electrodes. Then, specify the voltage on each as boundary condition.

Finally, create a box solid body for the alumina block.

Body Attributes and Materials

Two sheet bodies are used 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.

* Available from the Material DB

Boundary Conditions

To set Outer Boundary Condition, go to the [Model] tab
 

and click [Outer Boundary Condition] .

Results

To see the electrostatic force applied on the alumina block, go to the [Results] tab

 click [Table] .

You can observe the alumina block is pulled toward the electrodes.

The vectors of the electrostatic force are shown below.

The vectors of the electric field are shown below.

The electric field is concentrated in between the alumina block and the electrodes.