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cart-enrique.F90
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module problem
! Module for Capreole3D (F90)
! Author: Garrelt Mellema
! Date: 2007-10-01
! This is the problem module. It contains the routines which define the
! problem being solved:
! Contents:
! init_problem - sets up the hydro variables according to the specified
! problem
! inflow - sets the inflow boundary conditions
! This version: density and velocity fields (to be read in) for
! HII region evolution (cartesian coordinates). The density and
! and velocity fields are supposed to come from a turbulence
! calculation of Enrique Vazquez-Semadeni et al.
use file_admin, only: stdinput
use precision, only: dp
use my_mpi
use sizes, only: mbc,neq,RHO,RHVX,RHVY,RHVZ,EN
use scaling, only: SCDENS, SCVELO, SCLENG, SCMOME, SCENER
use atomic, only: gamma,gamma1
use cgsconstants, only: m_p
use astroconstants, only: pc
use abundances, only: mu
use mesh, only: sx,ex,sy,ey,sz,ez,meshx,meshy,meshz
use grid, only: x,y,z,dx,dy,dz
use hydro, only: state,pressr,set_state_pointer,NEW,OLD,restart_state
use ionic, only: init_ionic
use tped, only: n2rho,rho2n,pressr2temper
use protection, only: presprot
use geometry, only: presfunc
use boundary, only: exchngxy
implicit none
contains
subroutine init_problem (restart,restartfile)
! This routine initializes all hydro variables
! This may be a fresh start or a restart of a saved run
logical,intent(in) :: restart ! tells you whether it's a new run or a restart
character(len=19),intent(in) :: restartfile
! Local variables
real(kind=dp) :: r_interface ! dummy needed for calling init_ionic
integer :: ierror
if (.not.restart) then ! Fresh start
call fresh_start_state( )
else
call restart_state(restartfile,ierror)
state(:,:,:,RHO)=state(:,:,:,RHO)/scdens
state(:,:,:,RHVX)=state(:,:,:,RHVX)/scmome
state(:,:,:,RHVY)=state(:,:,:,RHVY)/scmome
state(:,:,:,RHVZ)=state(:,:,:,RHVZ)/scmome
state(:,:,:,EN)=state(:,:,:,EN)/scener
call exchngxy(OLD)
endif
! Initialize the ionic concentrations
call init_ionic(restart,r_interface)
end subroutine init_problem
!==========================================================================
subroutine fresh_start_state ( )
! This routine initializes all hydro variables for a fresh start
! Case: Enrique's density and velocity fields for a turbulent
! molecular cloud.
! Parameters of turbulence simulation
real(kind=dp),parameter :: Jeans=4.0 ! Jeans number
real(kind=dp),parameter :: csound=0.2e5 ! sound speed
real(kind=dp),parameter :: mu_simulation=2.4 ! mean weight per particle
! Local variables
real(kind=dp) :: rhomean,vx_c,vy_c,vz_c
integer :: m1,m2,m3
character(len=4) :: file_id
character(len=512) :: densityfield,momxfield,momyfield,momzfield
character(len=3) :: center_answer
real,allocatable,dimension(:,:,:) :: tempdens,tempmomx,tempmomy,tempmomz
integer,dimension(3) :: center_here
integer :: shft
integer :: i,j,k,ieq,ierror,nitt,idim, inegative
! Ask for the input if you are processor 0.
if (rank == 0) then
write (*,'(//,A,/)') '----- Environment -----'
write (*,'(A,$)') '1) File identifier (e.g. 0020): '
read (stdinput,*) file_id
! center on maximum density
center_answer='max'
endif
! report input parameters
if (rank == 0) then
write(30,'(A)') &
'Problem: cart-enrique'
write (30,'(//,A,/)') '----- Environment -----'
write (30,'(2A)') '1) File identifier: ',file_id
write (30,'(2A)') '3) Grid centered on: ',center_answer
endif
! Construct file names from file identifier
densityfield='ro'//file_id//'.bin'
momxfield='rovx'//file_id//'.bin'
momyfield='rovy'//file_id//'.bin'
momzfield='rovz'//file_id//'.bin'
! Read in density fields
open(unit=21,file=densityfield,form='unformatted',status='old')
read(21) m1,m2,m3
if (m1 .ne. meshx .or. m2.ne.meshy .or. m3.ne.meshz) then
write(*,*) 'Error: density field does not match specified mesh size'
stop
endif
allocate(tempdens(m1,m2,m3))
read(21) tempdens
close(21)
! Read in momenta fields
allocate(tempmomx(m1,m2,m3))
allocate(tempmomy(m1,m2,m3))
allocate(tempmomz(m1,m2,m3))
open(unit=21,file=momxfield,form='unformatted',status='old')
read(21) m1,m2,m3
read(21) tempmomx
close(21)
open(unit=21,file=momyfield,form='unformatted',status='old')
read(21) m1,m2,m3
read(21) tempmomy
close(21)
open(unit=21,file=momzfield,form='unformatted',status='old')
read(21) m1,m2,m3
read(21) tempmomz
close(21)
! Take care of centering
select case (center_answer)
case ('max')
center_here=maxloc(tempdens)
case ('min')
center_here=minloc(tempdens)
case default
center_here=(/ m1/2, m2/2, m3/2 /)
end select
do idim=1,3
shft=center_here(idim)-m1/2
tempdens=cshift(tempdens,shft,idim)
tempmomx=cshift(tempmomx,shft,idim)
tempmomy=cshift(tempmomy,shft,idim)
tempmomz=cshift(tempmomz,shft,idim)
enddo
write(*,*) 'Maximum density: ',maxval(tempdens), &
' at ',maxloc(tempdens)
! Subtract velocity of source point
vx_c=tempmomx(m1/2,m2/2,m3/2)/tempdens(m1/2,m2/2,m3/2)
vy_c=tempmomy(m1/2,m2/2,m3/2)/tempdens(m1/2,m2/2,m3/2)
vz_c=tempmomz(m1/2,m2/2,m3/2)/tempdens(m1/2,m2/2,m3/2)
tempmomx=(tempmomx/tempdens-vx_c)*tempdens
tempmomy=(tempmomy/tempdens-vy_c)*tempdens
tempmomz=(tempmomz/tempdens-vz_c)*tempdens
write(*,*) minval(tempmomx/tempdens),maxval(tempmomx/tempdens)
write(*,*) minval(tempmomy/tempdens),maxval(tempmomy/tempdens)
write(*,*) minval(tempmomz/tempdens),maxval(tempmomz/tempdens)
! Scaling: the mean number density is given by
! 500*(J/L(pc))^2, see Vazquez-Semanami et al. (2005).
rhomean=n2rho(500.0*(Jeans/(x(meshx)*scleng)*PC)**2)
write(*,*) minval(tempdens)*(500.0*(Jeans/(x(meshx)*scleng)*PC)**2), &
maxval(tempdens)*(500.0*(Jeans/(x(meshx)*scleng)*PC)**2)
! The turbulence simulation uses molecular hydrogen
! with a mean weight per particle of 2.4. We assume
! atomic hydrogen with a mean weight per particle of
! 1.3 (including the helium).
rhomean=mu_simulation/mu*rhomean
state(sx:ex,sy:ey,sz:ez,RHO)=tempdens*rhomean
state(sx:ex,sy:ey,sz:ez,RHVX)=tempmomx*csound*rhomean
state(sx:ex,sy:ey,sz:ez,RHVY)=tempmomy*csound*rhomean
state(sx:ex,sy:ey,sz:ez,RHVZ)=tempmomz*csound*rhomean
! Deallocate the temporary arrays
deallocate(tempdens)
deallocate(tempmomx)
deallocate(tempmomy)
deallocate(tempmomz)
! periodic box
do ieq=RHO,RHVZ
state(sx-mbc:sx-1,:,:,ieq)=state(ex-mbc:ex-1,:,:,ieq)
state(ex+1:ex+mbc,:,:,ieq)=state(sx:sx+mbc,:,:,ieq)
state(:,sy-mbc:sy-1,:,ieq)=state(:,ey-mbc:ey-1,:,ieq)
state(:,ey+1:ey+mbc,:,ieq)=state(:,sy:sy+mbc,:,ieq)
state(:,:,sz-mbc:sz-1,ieq)=state(:,:,ez-mbc:ez-1,ieq)
state(:,:,ez+1:ez+mbc,ieq)=state(:,:,sz:sz+mbc,ieq)
enddo
! Scale physical parameters
state(:,:,:,RHO)=state(:,:,:,RHO)/scdens
state(:,:,:,RHVX)=state(:,:,:,RHVX)/scmome
state(:,:,:,RHVY)=state(:,:,:,RHVY)/scmome
state(:,:,:,RHVZ)=state(:,:,:,RHVZ)/scmome
! Calculate the initial state: pressure and energy density
do k=sz-mbc,ez+mbc
do j=sy-mbc,ey+mbc
do i=sx-mbc,ex+mbc
pressr(i,j,k)=state(i,j,k,RHO)*csound*csound/gamma/ &
scvelo/scvelo
state(i,j,k,EN)=pressr(i,j,k)/gamma1+ &
0.5d0*(state(i,j,k,RHVX)*state(i,j,k,RHVX)+ &
state(i,j,k,RHVY)*state(i,j,k,RHVY)+ &
state(i,j,k,RHVZ)*state(i,j,k,RHVZ))/state(i,j,k,RHO)
enddo
enddo
enddo
end subroutine fresh_start_state
!==========================================================================
subroutine inflow (newold)
! This routine resets the inner boundary to the inflow condition
! Dummy version
integer,intent(in) :: newold
end subroutine inflow
!==========================================================================
subroutine apply_grav_force(dt,newold)
! Dummy routine
real(kind=dp),intent(in) :: dt
integer,intent(in) :: newold
end subroutine apply_grav_force
end module problem