# OS-E: 0600 Steady-state Thermal Analysis with Convection Loading of a Structure with Insulator

Heat sink with fins are commonly used in engineering applications to dissipate heat. The 3D geometry of an aluminum heat sink designed for cooling. The cross-sectional view of a furnace constructed from two materials.

## Model Files

Before you begin, copy the file(s) used in this example to
your working directory.

## Model Description

The inner part is made of copper and the outer heat sink wall is made of aluminum. The outer heat sink wall comes into contact with the ambient air and heat convection.

The Finite element model consists of three different materials.

Loads and boundary condition are explained in Figure 1.

**FE Model**- Element Types
- CHEXA

The MAT4 linear material properties are:

**Aluminum**- Thermal Conductivity
- 0.2
- Heat Capacity Per Unit Mass
- 921.0
- Density
- 2.9E-9
- Free Convection Heat Transfer Coefficient
- 0.001

**Cooper**- Thermal Conductivity
- 0.5
- Heat Capacity Per Unit Mass
- 385.0
- Density
- 6.0E-9
- Free Convection Heat Transfer Coefficient
- 0.0037

**For Insulator**- Thermal Conductivity
- 0.001
- Heat Capacity Per Unit Mass
- 410.0
- Density
- 1.02E-9
- Free Convection Heat Transfer Coefficient
- 0.00017

## Results

Grid temperature and SPC power is shown in Figure 2.
SPC power is a measure of energy flowing in and out of the
structure.

SPC power and Element Flux is shown in Figure 3.