Initialisation 
Monopole:    Bessel monopole of radius 0.5 and strength 4
             centred at (+3,-3)
Tracers:     single tracer point at the centre of the vortex
Computation: domain: X = (-10, ..., 10), Y = (-10, ..., 10)
             no. of grid points from wall to wall: (257, 257)
             boundary conditions: stress-free along all walls 
             standard Arakawa scheme used
             rotation effects: f0 = 0, beta = 0.3, gamma = 0
             no bottom topography
             solver for streamfunction: FACR
             viscosity: nu = 10^-3 (i.e. Re=1000 at T=0)
             time step: dt = 0.05
             final time: T = 50 

<=== Bessel monopole on a beta-plane

 
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created: 10 April 1998
last modified: 26 May 2001