Page 90 - Process Modelling and Simulation With Finite Element Methods

Partial Differential Equations and the Finite Element Method I1

Subdomain Mode
0 Select domain 1
0 Set f=O; c=l; d,=l
APPlY
Select the init tab; set u(tO)= ~ech((x-0.5)*10)~2
Set u-t(tO)= x*(l-x)/lO.
APPlY
OK
Now pull down the Solve menu and select the Parameters option. This pops
up the Solver Parameters dialog window.
Solver Parameters
General tab: select time dependent
Jacobian: numeric
Time-stepping tab. Take output times 0:0.05:2
0 Solve
Cancel
OK
Now generate an animation from the Post Menu, Plot Parameters: Animate
Tab. The final state at t=2 should look like Figure 2.6.

Waveform at time t=2
O9r

I I
0 01 02 03 04 05 06 07 08 09 1
x position
Figure 2.6 Waveform at t=2.