CAE Software【Femtet】Murata Software Co., Ltd.
In this exercise, a spherical charge is placed in the air.
The electric field created by it is solved and the equipotential map is acquired.
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 |
Solver |
Electric Field Analysis [Coulomb] |
Analysis Type |
Static analysis |
Material Type |
Dielectric material |
Options |
N/A |
Ambient air scale in this Exercise is a bit larger than the default setting.
Tab |
Setting Item |
Settings |
Mesh Tab |
Ambient Air Creation |
Create ambient air automatically: Select Ambient Air Scale: 5.0 |
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 |
A sphere to represent the spherical charge is placed inside the cube.
Body Number/Type |
Body Attribute Name |
Material Name |
1/Solid |
Sphere |
000_Air(*) |
* Available from the Material DB
Charge is set in the body attribute.
Body Attribute Name |
Charge |
Sphere |
Charge density: Charge Density 1×10^-3[C/m3] |
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
Outer Boundary Condition * |
Electric |
Open boundary |
|
To set Outer Boundary Condition, go to the [Model] tab
and click [Outer Boundary Condition] .
[Results]
The figure below shows the gradation contour of the potential on the Z=0 plane.
The potential map around the charge is well presented visually.
The potential at the spherical center is the highest.