XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX''"> Exercise 12 - Heat Transfer Analysis
In this exercise, you will subject the cantilever beam to thermal loading. The beam will have a temperature range between 50 and 100 degrees at opposing ends. The initial temperature of all nodes is zero. Both a transient and a steady state heat transfer analysis will be done. The transient analysis will be conducted over a period of approximately 1/2 hour to show that the steady state condition is not quite reached in this time.
Step 1: Do Exercise 1 - Build a Cantilever Beam
Step 2: Open a New Database.
Step 3: Import the Old Database.
Step 4: Post Only the Beam.
Step 5: Create the Thermal Properties.
Step 6: Apply Element Properties.
Step 7: Apply Element Properties.
Step 8: Apply Initial Conditions.
Step 9: Set Up Model for Analysis
Step 10: Monitor the Analysis.
Step 11: Read the Results.
Step 12: Plot the Temperature Distribution.
A separate curve for each load increment (time step) is plotted showing the temperature distribution over the length of the beam.
The first curve is at zero, coincident with the x-axis, corresponding to the initial conditions. The last plot is the steady state solution, being a linear temperature distribution between 100 and 50 degrees. The other curves are different states of the transient solution over time. Note that the time was not quite long enough to obtain the steady state solution.
Also note that because of the coarseness of the mesh, the results are not as accurate as they would be with a fine mesh. This would be apparent if you were to redo the transient step and do about 50 steps in the first 20 seconds. You will notice that an instability occurs where the temperatures in a couple of locations on the beam dip below zero which is physically impossible. A finer mesh would take care of that problem.
Step 13: Closing/Quitting Patran.
