Example24 Thermal Analysis Using Results (Heat Density) Imported from Magnetic Field Harmonic Analysis

General

  • Using Results Import, the loss density obtained from an electric field harmonic analysis is used for a thermal analysis.
     

  • The temperature distribution and the heat flux vectors are solved.
     

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

 

 

Analysis Conditions

Item

Setting

Solver

Thermal analysis [Watt]

Analysis Space

3D

Analysis Type

Steady-state analysis

Unit

mm

Results Import

Heat density

Model

The substrate is a solid body.
The strip line is a sheet body.

 

Body Attributes and Materials

Body Number/Type

Body Attribute Name

Material Name

0/Solid

VOL1

001_Alumina *

6/Sheet

VOL2

008_Cu (*)

* Available from the material DB

 

The conductive strip line is a sheet body. Its thickness must be defined.

The values of current and heat source will vary depending on the thickness.

Body Attribute Name

Thickness/Width

Analysis Domain

StripLine

Thickness of Sheet Body : 0.1mm

 

 

Boundary Condition

  • The temperature of the bottom face of the substrate is set to 25[deg] by the boundary condition of T0.

  • The faces where the strip line ends are set with the “adiabatic” boundary condition, T_Wall.
    That keeps the outer boundary condition from being applied on them.

  • The heat transfer to the ambient is defined by the outer boundary condition.

 

Boundary Condition Name/Topology

Tab

Boundary Condition Type

Setting

T_Wall/Face

Thermal

Adiabatic

 

T0/Face

Thermal

Temperature

25[deg]

Outer Boundary Condition *

Thermal

Heat transfer/Ambient radiation

Heat transfer coefficient: 10 [W/m2/deg]

Ambient temperature: 25[deg]

 

Results

First, run the electric analysis in the project. The loss density diagram is shown as below.

You can see the current density is distributed at around the bending area of the strip.

Next, run the thermal analysis in the project. The diagram below shows the temperature distribution.

Temperature rise due to heat generation occurs along the strip line, and the heat is transmitted to the alumina substrate.