Page 80 - Process Modelling and Simulation With Finite Element Methods

Partial Differential Equations and the Finite Element Method 61

Draw Mode
Draw circle and edit it to achieve a unit
radius centered at the origin
Select AxesfSettings
Set y in the range -1.2 to 1.2
Apply
0 OK
Now for the boundary conditions. Pull down the Boundary menu and select
Boundary Settings. Note that there are four segments of the boundary, even
though we thought we drew a contiguous circular domain.
Boundary Mode

0 Select domain 1-4
Check Dirichlet and set h=l, r=O (u=O)
APPlY
OK
Now pull down the Subdomain menu and select Subdomain mode. Select
Subdomain settings.

Subdomain Mode
Select domains 1
Setc=l;f=l
Apply
OK
0
Click on the triangle symbol to mesh (620 elements).

Now click on the equals sign = on the toolbar to solve.