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main.f90
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main.f90
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!> @mainpage
!>@author
!>Paul J. Connolly, The University of Manchester
!>@copyright 2017
!>@brief
!>Shallow Water Model on Sphere (SWMOS):
!>Solves the shallow water equations on a rotating sphere for a lat / lon grid:
!> <br> <b>Continuity:</b> <br>
!>\f$ \frac{\partial h}{\partial t}+\frac{1}{R_e\cos\theta}
!> \frac{\partial }{\partial \theta} \left(hv_\theta\cos\theta\right)+
!> \frac{1}{R_e\cos\theta}
!> \frac{\partial}{\partial \phi} \left(hv_\phi\right)=0
!>\f$
!>
!> <br> <b>horizontal momentum 1:</b> <br>
!>\f$ \frac{\partial v_\phi h}{\partial t} +
!> \frac{1}{R_e\cos\theta}\frac{\partial }{\partial \theta}
!> \left(v_\phi v_\theta h\cos\theta \right) +
!> \frac{1}{R_e\cos\theta}\frac{\partial }{\partial \phi}
!> \left(v_\phi ^2 h+\frac{gh^2}{2}\right) =
!> -\frac{gh}{R_e\cos\theta}
!> \frac{\partial }{\partial \phi} \left(H\right)+fhv_\theta
!>\f$
!>
!> <br><br>
!> <br> <b>horizontal momentum 2:</b> <br>
!>\f$ \frac{\partial v_\theta h}{\partial t} +
!> \frac{1}{R_e\cos\theta}\frac{\partial }{\partial \theta}
!> \left(v_\theta ^2 h+\frac{gh^2\cos\theta}{2}\right) +
!> \frac{1}{R_e\cos\theta}\frac{\partial }{\partial \phi}
!> \left(v_\phi v_\theta h\right) =
!> -\frac{gh}{R_e}\frac{\partial }{\partial \theta} \left(H \right)-fhv_\phi
!>\f$
!>
!> <br><br>
!> compile using the Makefile (note requires netcdf) and then run using: <br>
!> mpiexec -n 4 ./main.exe namelist.in
!> <br><br>
!> (namelist used for initialisation).
!> <br><br>
!>@author
!>Paul J. Connolly, The University of Manchester
!>@brief
!>main programme reads in information, allocates arrays, then calls the model driver
program main
use variables
use mpi
use mpi_module
use initialisation
use drivers
use numerics_type, only : wp
implicit none
character (len=200) :: nmlfile = ' '
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! namelist for run variables !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
namelist /run_vars/ nm1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! MPI initialisation !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call MPI_Init ( mp1%error )
call MPI_Comm_rank ( MPI_COMM_WORLD, mp1%id, mp1%error )
call MPI_Comm_size ( MPI_COMM_WORLD, mp1%rank, mp1%error )
mp1%wtime = MPI_Wtime ( )
print *,'MPI running with ID: ',mp1%id,' and rank ',mp1%rank
call mpi_define(MPI_INTEGER9)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! read in namelists !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call getarg(1,nmlfile)
open(8,file=nmlfile,status='old', recl=80, delim='apostrophe')
read(8,nml=run_vars)
close(8)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
grid1%o_halo=1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Block until processors have synced !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call block_ring(MPI_COMM_WORLD,mp1%id,world_process,mp1%rank)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Set-up the Cartesian topology !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! note the min is so that there is not more than 1 proc per grid point
mp1%dx=min( floor( sqrt(real(mp1%rank,wp)) ), nm1%ip)
mp1%dy=min( floor( real(mp1%rank,wp) / real(mp1%dx,wp) ), nm1%jp )
if(mp1%id == world_process) then
print *,'Cartesian topology: ',mp1%dx, mp1%dy
if ( mp1%dx * mp1%dy < mp1%rank) print *, 'warning wasted processors'
endif
mp1%periods=[.true.,.false.]
mp1%dims=[mp1%dx,mp1%dy]
! cart topo:
call MPI_CART_CREATE( MPI_COMM_WORLD, mp1%ndim, mp1%dims, &
mp1%periods, mp1%reorder,mp1%ring_comm, mp1%error )
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Allocate and initialise arrays !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call allocate_and_set(grid1%ip,grid1%jp,grid1%ntim, grid1%f, &
grid1%re, grid1%g, grid1%rho, grid1%dphi, grid1%dtheta, &
grid1%dphin, grid1%dthetan, &
grid1%f_cor,grid1%h,grid1%hs, grid1%u, grid1%v, &
grid1%height, grid1%dt,grid1%dx, grid1%dy, grid1%x, grid1%y, &
grid1%phi, grid1%theta, grid1%phin, grid1%thetan, &
grid1%recqdp, grid1%recqdp_s, grid1%recqdq_s, grid1%redq_s, grid1%redq, &
grid1%recq, grid1%cq_s, grid1%cq, grid1%dp1, grid1%dq, &
grid1%recqdq, &
grid1%u_nudge,grid1%o_halo, &
grid1%ipstart, grid1%jpstart, grid1%coords, &
nm1%inputfile, nm1%add_random_height_noise, &
nm1%initially_geostrophic, nm1%initial_winds, &
nm1%u_jet, nm1%theta_jet, nm1%h_jet, &
nm1%ip, nm1%jp, &
nm1%wind_factor, nm1%wind_shift, nm1%wind_reduce, nm1%runtime, &
nm1%dt, nm1%grav, nm1%rho, nm1%re, &
nm1%rotation_period_hours, nm1%scale_height, nm1%slat, &
nm1%nlat, nm1%slat_thresh, nm1%nlat_thresh, &
mp1%dims, mp1%id, mp1%ring_comm)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Block until processors have synced !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call block_ring(MPI_COMM_WORLD,mp1%id,world_process,mp1%rank)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Driver code: time-loop, advance solution, output !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call model_driver(nm1%ip,grid1%ip,nm1%jp,grid1%jp,grid1%ntim, grid1%f, &
grid1%re, grid1%g, grid1%rho, grid1%dphi, grid1%dtheta, &
grid1%dphin, grid1%dthetan, &
grid1%f_cor,grid1%h,grid1%hs, grid1%u, grid1%v, &
grid1%height, grid1%dt, grid1%dx, grid1%dy, grid1%x, grid1%y, &
grid1%phi, grid1%theta, grid1%phin, grid1%thetan, &
grid1%recqdp, grid1%recqdp_s, grid1%recqdq_s, grid1%redq_s, grid1%redq, &
grid1%recq, grid1%cq_s, grid1%cq, grid1%dp1, grid1%dq, &
grid1%recqdq, &
grid1%u_nudge,grid1%o_halo, &
grid1%ipstart, grid1%jpstart, grid1%coords, &
io1%new_file, nm1%outputfile, nm1%output_interval, &
nm1%nudge,nm1%nudge_timescale, &
nm1%subgrid_model, nm1%viscous_dissipation, &
nm1%dissipate_h,nm1%vis,nm1%cvis, &
nm1%vis_eq,nm1%lat_eq, &
mp1%dims,mp1%id, world_process, mp1%rank, mp1%ring_comm)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Terminate MPI !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
call MPI_Finalize ( mp1%error )
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
end program main