Much to my regret the profider that hosted my webpages
for more than 25 years has announced that after 1 July
2026 they end the hosting service.
Therefore all my web pages have been moved to another
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https://josvg.home.xs4all.nl/ to http://www.josvg.dds.nl/.
The current page can now be found here.

Interaction of 16 monopoles - symmetrical
with stress-free walls

Details on the computation 

Initialisation 
Monopoles:   16 Bessel monopoles of radius 0.45:
              8 of circulation +2 placed at: -1.0, 1.0   1.0, 1.0
                                              0.0, 0.0   2.0, 0.0
                                             -1.0,-1.0   1.0,-1.0
                                              0.0,-2.0   2.0,-2.0
              8 of circulation -2 placed at:  0.0, 1.0   2.0, 1.0
                                             -1.0, 0.0   1.0, 0.0
                                              0.0,-1.0   2.0,-1.0
                                             -1.0,-2.0   1.0,-2.0
Computation: domain: X = (-3, ..., 4), Y = (-4, ..., 3)
             no. of grid points from wall to wall: (129, 129)
             boundary conditions: stress-free along all walls 
             standard Arakawa scheme used
             no rotation effects included
             no bottom topography
             viscosity: nu = 10^-3 (i.e. Re=1000 at T=0)
             time step: dt = 0.05
             final time: T = 50

<=== Interaction of 16 monopoles - symmetrical

 
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created: 1 December 1995
last modified: 26 May 2001