[Anuga-user] Transmissive Momentum set stage boundary conditions

[William P. <W....@gn...>]

Hi Duncan,

I hope that things are going well, and that you won't mind if I bug you 
about something....

I've been trying to use the Transmissive Momentum set stage boundary 
conditions, but am running into problems. In my code I have something 
like:

Br = Reflective_boundary(domain)      # Solid reflective wall
Bt = Transmissive_boundary(domain)    # Continue all values on boundary 
Btmss = Transmissive_Momentum_Set_Stage_boundary(domain=domain,     # Time 
dependent stage boundary 
                   f=lambda t: 
amplitude*(1.-2.*(pi*(1./720.)*(t-720.))**2)/exp((pi*(1./720.)*(t-720.))**2))

# Associate boundary tags with boundary objects
domain.set_boundary({'left': Btmss, 'right': Bt, 'top': Br, 'bottom': Br})

But I keep getting errors like:

 File "myexample2.py", line 80, in ?
    f=lambda t: 
amplitude*(1.-2.*(pi*(1./720.)*(t-720.))**2)/exp((pi*(1./720.)*(t-720.))**2))
TypeError: __init__() got an unexpected keyword argument 'f'

Do you have a small example code which illustrates how to set up this type 
of bc?

Cheers,
William