Example26 Composite Material with Cylindrical Anisotropic Thermal Conductivity

General

Composite material having cylindrical anisotropic thermal conductivity is analyzed.
Unless specified in the list below, the default conditions will be applied.

Analysis Condition

Item	Setting
Solver	Thermal analysis [Watt]
Analysis Space	3D
Analysis Type	Steady-State Analysis
Unit	mm
Analysis Options	None

Model

A heat source is in the center of the cylinder, and surrounded by the composite material.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	Heat source	001_Al *
1/Solid	Composite material	Composite material

* Available from the material DB

Body Attribute Name

Tab

Setting

Heat source

Heat Source

Heat Amount: 1[W]

Composite material

Direction

Specified by: Vector

Enter two vectors and specify 3 directions is selected

Select Use distribution data

Use Z’ vector distribution

Edit Distribution Data dialog box

Distribution Dimension: 2D

Coordinate System: Global Coordinates

Number	X’ Coordinate	Y’ Coordinate	X component	Y component	Z component
1	-1	0	0	0	1
2	1	0	0	0	1

Exponent	-3
Unit	[m]

Use X’ vector distribution

Edit Distribution Data dialog box

Distribution Dimension: 2D

Coordinate System: Global Coordinates

Number	X’ Coordinate	Y’ Coordinate	X component	Y component	Z component
1	-5	0	1	0	0
2	5	0	-1	0	0
3	0	-5	0	1	0
4	0	5	0	-1	0

Exponent	-3
Unit	[m]

Material Name

Tab

Setting

Composite material

Thermal Conductivity

Anisotropy: Anisotropic

Temperature Dependency: No

Thermal Conductivity Matrix

	x	y	z
x	3
y	0	1
z	0	0	1

[W/m/deg]

Boundary Condition

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Setting
Outer Boundary Condition	Thermal	Heat transfer: Convection	Natural convection (automatic calculation)

Results

Directional distribution 2 (X’ axis) of the meshes is shown below.

The directions are in the cylindrical coordinate system.

Temperature distribution is shown below. The unit of the color scale is [deg].

Because of the cylindrical anisotropy, the temperature distribution in the angular direction is uniform.

See other Thermal Analysis examples.