This tutorial was created using ANSYS 7.0 to solve simple thermal examples.
Analysis of a simple conduction as well a mixed conduction/convection/insulation problem will be demonstrated.
The Mixed Convection/Conduction/Insulated Boundary Conditions Example is constrained as shown in the following figure (Note that the section is assumed to be infinitely long):
- Give example a Title
ANSYS Main Menu > Preprocessor
- Open preprocessor menu
Preprocessor > Modeling > Create > Areas > Rectangle > By 2 Corners > X=0, Y=0, Width=1, Height=1
- Create geometry
Preprocessor > Element Type > Add/Edit/Delete... > click 'Add' > Select Thermal Mass Solid, Quad 4Node 55
- Define the Type of Element
As in the conduction example, we will use PLANE55 (Thermal Solid, Quad 4node 55). This element has 4 nodes and a single DOF (temperature) at each node.
PLANE55 can only be used for 2 dimensional steady-state or transient thermal analysis.
Preprocessor > Material Props > Material Models > Thermal > Conductivity > Isotropic > KXX = 10
- Element Material Properties
This will specify a thermal conductivity of 10 W/m*C.
Preprocessor > Meshing > Size Cntrls > ManualSize > Areas > All Areas > 0.05
- Mesh Size
Preprocessor > Meshing > Mesh > Areas > Free > Pick All
Solution > Analysis Type > New Analysis > Steady-State
- Define Analysis Type
- Apply Conduction Constraints
In this example, all 2 sides of the block have fixed temperatures, while convection occurs on the other 2 sides.
- Solution > Define Loads > Apply > Thermal > Temperature > On Lines
- Select the top line of the block and constrain it to a constant value of 500 C
- Using the same method, constrain the left side of the block to a constant value of 100 C
Apply Convection Boundary Conditions
Apply Insulated Boundary Conditions
- Solution > Define Loads > Apply > Thermal > Convection > On Lines
- Select the bottom of the block.
- Enter a constant Film coefficient (VALI) of 0. This will eliminate convection through the side, thereby modeling an insulated wall.
Note: you do not need to enter a Bulk (or ambient) temperature
You should obtain the following:
Solve the System
Solution > Solve > Current LS
- Results Using ANSYS
General Postproc > Plot Results > Contour Plot > Nodal Solu ... > DOF solution, Temperature TEMP
The above example was solved using a mixture of the Graphical User Interface (or GUI)
and the command language interface of ANSYS. This problem has also been solved using the
ANSYS command language interface that you may want to browse. Open the .HTML version, copy
and paste the code into Notepad or a similar text editor and save it to your computer. Now go to
'File > Read input from...' and select the file. A .PDF version is also available for