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):


  1. Give example a Title

  2. Open preprocessor menu ANSYS Main Menu > Preprocessor
    /PREP7

  3. Create geometry Preprocessor > Modeling > Create > Areas > Rectangle > By 2 Corners > X=0, Y=0, Width=1, Height=1
    BLC4,0,0,1,1

  4. Define the Type of Element
  5. Preprocessor > Element Type > Add/Edit/Delete... > click 'Add' > Select Thermal Mass Solid, Quad 4Node 55
    ET,1,PLANE55

    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.

  6. Element Material Properties
  7. Preprocessor > Material Props > Material Models > Thermal > Conductivity > Isotropic > KXX = 10
    MP,KXX,1,10

    This will specify a thermal conductivity of 10 W/m*C.

  8. Mesh Size
  9. Preprocessor > Meshing > Size Cntrls > ManualSize > Areas > All Areas > 0.05
    AESIZE,ALL,0.05

  10. Mesh
  11. Preprocessor > Meshing > Mesh > Areas > Free > Pick All
    AMESH,ALL

  1. Define Analysis Type
  2. Solution > Analysis Type > New Analysis > Steady-State
    ANTYPE,0

  3. Apply Conduction Constraints
  4. In this example, all 2 sides of the block have fixed temperatures, while convection occurs on the other 2 sides.

  5. Apply Convection Boundary Conditions
  6. Apply Insulated Boundary Conditions
  7. You should obtain the following:

  8. Solve the System
  9. Solution > Solve > Current LS
    SOLVE

  1. Results Using ANSYS
  2. Plot Temperature

    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 printing.