Below you see an example of an input file for 'nsevol'.
On the left are the values read by 'nsevol', on the right are the corresponding variable names; this example shows most, but not all, possibilities. For instance, there is no background rotation and no topography.

In this example, a Bessel monopole with an elliptic form is placed in a domain with a uniform flow in the X-direction. Tracers are placed on ellipse at the edge of the vortex and along a vertical line, and three separate tracer points are placed too. The name of the run, mn123, is used for making filenames.
The program 'nsevol' generates a "general data file", in this case called mn123.gen, which gives some details about the run. Here is a part of that file for this example

This example has little physical meaning -- it is merely meant to show how the input file is constructed, and that this is quite complicated. For this reason, it is hardly useful to show any results of this run.
The page Numerical simulations of 2D vortex evolution with a Finite Difference Method gives a list of available examples of results of computations.

 -3.d0  3.d0 -3.d0  3.d0               ! alx1i  alx1f  alx2i  alx2f
 129 129                               ! n1  n2
  1   1   2                            ! jbcx  jbcy   kind of flow (kof)
  1.d0  2.d0                           ! psix2i  psix2f
  0                                    ! nrot
  0   1                                ! ktopo  kpsi
  1   1                                ! iarak (Arakawa's coef.)  nnln
 1.d+3   80.d0  100   1    0           ! re=1/visc.  tmax  mmax  mist  icfl
 5.d-2   50                            ! dt  mstam
  2                                    ! nrc
  1.6d0   1                            ! rorc0   kind of circle 
  1   1   0   3                        ! np1  np2  npsi  nout  
  1   2   2   10   2   0               ! npl  ncs  ntrm  npltm  nps  ngout
  4   4                                ! ngp1  ngp2
  25                                   ! nprfl
 -2.d0 -2.d0  2.d0 2.d0  0.d0 0.d0  0  ! xa  ya  xa  yb  xc  yc  nmpfl
 'mn123'                               ! namrun [max. 8 char.; 3 are prefix]
  1                                    ! kind of vorticity (kov)
  0.d0  0.d0  4.d0  0.d0 1.5d0  1.d0   ! yc1  yc2  strength  thet0  ra1  ra2
  9                                    ! kov --> no more
  5                                    ! kind of tracers (kot)
  0.d0  0.d0  1.5d0  1.d0  100  1      ! tc1  tc2  rt1  rt2  ntr  ktrds
  0                                    ! kot
  0.d0 -2.d0  0.d0   2.d0   80  1      ! tc1  tc2  rt1  rt2  ntr  ktrds
  8                                    ! kot
  0.d0  0.d0   1                       ! xt  yt  nxt
  1.d0  0.d0   1                       ! xt  yt  nxt
  0.d0  0.5d0  0                       ! xt  yt  nxt
  9                                    ! kot --> no more
  1  2                                 ! ntprt  ktout 

*********************************************************************
***   nsevol.in -- 18 february 1998
***
***   example input file for nsevol.f
*********************************************************************

<=== Running the program 'nsevol'.

<=== Numerical simulations of 2D vortex evolution with a Finite Difference Method.

 
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last modified: 26 May 2001