Heat Radiation by Natural Convection(Steady-State Analysis)examples|products|Murata Software Co., Ltd.

Example5 Heat Radiation by Natural Convection(Steady-State Analysis)

General

  • The heat radiation from an aluminum plate is analyzed.
     

  • The heat transfer coefficient is acquired manually.
    To acquire it automatically, see “Exercise 14: Natural Convection with Correction Coefficient Automatically Calculated”.
     

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

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

 

Analysis Space

Item

Settings

Analysis Space

3D

Model unit

mm

 

Analysis Conditions

Item

Settings

Solvers

Thermal Analysis [Watt]

Analysis Type

Steady-state analysis

Options

N/A

Model

Aluminum plate, defined by a rectangular solid body, is placed vertically. The bottom face is set with the Temperature boundary condition.

The other faces are set with the Heat transfer/Ambient radiation boundary condition.

Body Attributes and Materials

Body Number/Type

Body Attribute Name

Material Name

0/Solid

VOL1

404 Pure-Al1100 *

* Available from the Material DB

Boundary Conditions

The coefficient for the natural convection is given by the formula below. See [Heat Transfer/Ambient Radiation] for more information.

The coefficient can be calculated automatically if that is preferred.
 

2.51×C×(1/L)^(1/4) = 2.50 [W/m2/deg5/4]

where

C = 0.56

L = 0.1

 

Boundary Condition Name/Topology

Tab

Boundary Condition Type

Settings

Temp/Face

Thermal

Temperature

80[deg]

Outer Boundary Condition

Thermal

Heat Transfer/Ambient Radiation

Natural convection: 2.50[W/m2/deg5/4]

Room Temperature : 25[deg]

 

Results

The temperature distribution is shown below.

The temperature is 80[deg] at the bottom face and it decrease gradually to 72[deg] at higher places.

 

The vectors of the heat flux are shown below.

Heat flux vectors point from higher temperature towards lower temperature. Their magnitude indicates the temperature gradient.