This tutorial was created using ANSYS 7.0 to solve a simple conduction problem.
The Simple Conduction Example is constrained as shown in the following figure.
Thermal conductivity (k) of the material is 10 W/m*C and the block 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
For this 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 (Thermal conductivity)
- Element Material Properties
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 Constraints
For thermal problems, constraints can be in the form of Temperature, Heat Flow, Convection, Heat Flux, Heat Generation, or Radiation.
In this example, all 4 sides of the block have fixed temperatures.
Solve the System
Solution > Solve > Current LS
- Results Using ANSYS
General Postproc > Plot Results > Contour Plot > Nodal Solu ... > DOF solution, Temperature TEMP
Note that due to the manner in which the boundary contitions were applied, the top corners are held at a temperature of 100.
Recall that the nodes on the top of the plate were constrained first, followed by the side and bottom constraints.
The top corner nodes were therefore first constrained at 500C, then 'overwritten' when the side constraints were applied.
Decreasing the mesh size can minimize this effect, however, one must be aware of the limitations in the results at the corners.
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