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Example 7: Electrostatic Forces Applied on Dielectric Material

In this example, an alumina block is inserted in the parallel plates which have the electric potential difference.
The electrostatic forces applied on the alumina block and the distribution of the electric field are solved.
Unless specified in the list below, the default conditions will be applied.

Select "Static analysis" as the electric potential is static.

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

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

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

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

Two sheet bodies are used to imprint the electric potential-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 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 electrostatic force applied on the alumina block, go to the [Results] tab

and 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.