General
Home / Examples / Coupled Analysis / Magnetic-Thermal-Stress Analysis [Gauss/Watt/Galileo] / Example 1: Deformation due to the Heating Caused by Applied Current
This is an example of the magnetic-thermal-stress coupled analysis.
Joule loss due to the applied current is analyzed in the magnetic analysis and the rise in temperature is analyzed in the thermal analysis.
Deformation caused by the temperature rise is analyzed in the stress analysis.
The vectors of the magnetic field, the temperature distribution by the heating, and the deformation are solved.
Unless specified in the list below, the default conditions will be applied.
Results will vary depending on Femtet version and the PC environment.
Item |
Settings |
Analysis Space |
3D |
Model Unit |
mm |
Item |
Settings |
Solver |
Magnetic Analysis [Gauss] Thermal Analysis [Watt] Stress Analysis [Galileo] |
Analysis Type |
Magnetic Analysis: Static Analysis Thermal Analysis: Steady-state Analysis Stress Analysis: Static Analysis |
Options |
None * |
* [Thermal Load] is selected by default for the thermal-stress coupled analysis.
The Step/Thermal Load tab is set as follows.
Tabs |
Setting Item |
Settings |
Step/Thermal load |
Reference Temperature |
25 [deg] |
* The reached temperatures come from the thermal analysis.
Set the Mesh Tab as follows.
Tab |
Setting Item |
Settings |
Mesh |
Meshing Setup |
Automatically set the general mesh size: Deselect General Mesh Size: 2 [mm] |
A helical solid body Coil (coil) is defined.
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
Coil |
008_Cu * |
* Available from the material DB
Body attribute is set up as follows to apply current to the coil.
Body Attribute Name |
Tab |
Settings |
Coil |
Current |
Waveform: Constant Current: 100 [A] Turns: 1 [Turns] Direction: Specify Inflow/Outflow faces (In the Air Box): Select Inflow Face and Outflow Face. |
The displacement at both ends of the coil is fixed.
[Natural Convection (Automatic Coefficient Calculation)] is set with the outer boundary condition surrounding the coil.
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
Outer Boundary Condition * |
Thermal |
Heat Transfer/Convection |
Natural Convection (Automatic Coefficient Calculation) Ambient Temperature: 25 [deg] |
* The outer boundary condition is set at Outer Boundary Condition on the menu bar.
The vectors of the magnetic field are shown below.
The vectors of the current density are shown below.
The current is flowing as set for the coil.
The temperature contour as a result of Watt is shown below.
The coil temperature goes up as high as 130 [deg].
The vectors of displacement as a result of stress analysis are shown below. The contour diagram shows the magnitude of displacement.
The coil is swelled due to the temperature rise.