Page 161 - Process Modelling and Simulation With Finite Element Methods

148 Process Modelling and Simulation with Finite Element Methods

Boundary Mode

I weak I dweak constr
uc (0 10 10
vc 10 10 10
Apply/OK
Use the Multiphysics menu to select mode cd
Set U=uinlet; V=vinlet on bnd 1
Apply/OK

Zero-ing out the constraints returns the weak mode to natural (Neumann)
boundary conditions.
Pull down the options menu and select Add/Edit constants. The AddEdit
constants dialog box appears. Assign the constants as below.

Add/Edit Constants
0 Remove u, u0 and v0
Set f=0; Ufeed=l.O; Vfeed=0.4; lump=0.5
Apply
OK

Now pull down the Subdomain menu and select Subdomain settings. Assign
the model constants for the six equations as below:

weak dweak constr init
uc -ucx.*ucx-test+uc-test*(ue-uc)*(l-lump) uc-time.*uc-test 0 ue
vc -vcx.*vcx-test+vc-test*(ve-vc)*(l-lump) vc-time.*vc-test 0 ve

Now for the hard part. The coupling variables. Pull down the Options menu
and select Add/Edit Coupling Variables. Enter the eight coupling variables as
below: