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gyacomo/src/grid_mod.F90
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grid_mod.F90
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MODULE grid
! Grid module for spatial discretization
USE prec_const
USE basic
IMPLICIT NONE
PRIVATE
! GRID Namelist
INTEGER, PUBLIC, PROTECTED :: pmaxe = 1 ! The maximal electron Hermite-moment computed
INTEGER, PUBLIC, PROTECTED :: jmaxe = 1 ! The maximal electron Laguerre-moment computed
INTEGER, PUBLIC, PROTECTED :: pmaxi = 1 ! The maximal ion Hermite-moment computed
INTEGER, PUBLIC, PROTECTED :: jmaxi = 1 ! The maximal ion Laguerre-moment computed
INTEGER, PUBLIC, PROTECTED :: maxj = 1 ! The maximal ion Laguerre-moment computed
INTEGER, PUBLIC, PROTECTED :: Nr = 16 ! Number of total internal grid points in r
REAL(dp), PUBLIC, PROTECTED :: Lr = 1._dp ! horizontal length of the spatial box
INTEGER, PUBLIC, PROTECTED :: Nz = 16 ! Number of total internal grid points in z
REAL(dp), PUBLIC, PROTECTED :: Lz = 1._dp ! vertical length of the spatial box
INTEGER, PUBLIC, PROTECTED :: Nkr = 8 ! Number of total internal grid points in kr
REAL(dp), PUBLIC, PROTECTED :: Lkr = 1._dp ! horizontal length of the fourier box
INTEGER, PUBLIC, PROTECTED :: Nkz = 16 ! Number of total internal grid points in kz
REAL(dp), PUBLIC, PROTECTED :: Lkz = 1._dp ! vertical length of the fourier box
REAL(dp), PUBLIC, PROTECTED :: kpar = 0_dp ! parallel wave vector component
! For Orszag filter
REAL(dp), PUBLIC, PROTECTED :: two_third_krmax
REAL(dp), PUBLIC, PROTECTED :: two_third_kzmax
! 1D Antialiasing arrays (2/3 rule)
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: AA_r
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: AA_z
! Grids containing position in physical space
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: rarray
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: zarray
REAL(dp), PUBLIC, PROTECTED :: deltar, deltaz
INTEGER, PUBLIC, PROTECTED :: irs, ire, izs, ize
INTEGER, PUBLIC :: ir,iz ! counters
integer(C_INTPTR_T), PUBLIC :: local_nkr, local_nz
integer(C_INTPTR_T), PUBLIC :: local_nkr_offset, local_nz_offset
INTEGER, PUBLIC :: local_nkp
INTEGER, PUBLIC :: local_np_e, local_np_i
integer(C_INTPTR_T), PUBLIC :: local_np_e_offset, local_np_i_offset
INTEGER, DIMENSION(:), ALLOCATABLE, PUBLIC :: counts_np_e, counts_np_i
INTEGER, DIMENSION(:), ALLOCATABLE, PUBLIC :: displs_np_e, displs_np_i
! Grids containing position in fourier space
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: krarray
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: kzarray
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: kparray ! kperp array
REAL(dp), PUBLIC, PROTECTED :: deltakr, deltakz
INTEGER, PUBLIC, PROTECTED :: ikrs, ikre, ikzs, ikze, ikps, ikpe
INTEGER, PUBLIC, PROTECTED :: ikr_0, ikz_0 ! Indices of k-grid origin
INTEGER, PUBLIC :: ikr, ikz, ip, ij, ikp ! counters
! Grid containing the polynomials degrees
INTEGER, DIMENSION(:), ALLOCATABLE, PUBLIC :: parray_e
INTEGER, DIMENSION(:), ALLOCATABLE, PUBLIC :: parray_i
INTEGER, DIMENSION(:), ALLOCATABLE, PUBLIC :: jarray_e
INTEGER, DIMENSION(:), ALLOCATABLE, PUBLIC :: jarray_i
INTEGER, PUBLIC, PROTECTED :: ips_e,ipe_e, ijs_e,ije_e ! Start and end indices for pol. deg.
INTEGER, PUBLIC, PROTECTED :: ips_i,ipe_i, ijs_i,ije_i
INTEGER, PUBLIC, PROTECTED :: ipsg_e,ipeg_e, ijsg_e,ijeg_e ! Ghosts start and end indices
INTEGER, PUBLIC, PROTECTED :: ipsg_i,ipeg_i, ijsg_i,ijeg_i
! Public Functions
PUBLIC :: init_1Dgrid_distr
PUBLIC :: set_pgrid, set_jgrid
PUBLIC :: set_krgrid, set_kzgrid, set_kpgrid
PUBLIC :: grid_readinputs, grid_outputinputs
PUBLIC :: bare, bari
! Precomputations
real(dp), PUBLIC, PROTECTED :: pmaxe_dp, pmaxi_dp, jmaxe_dp,jmaxi_dp
CONTAINS
SUBROUTINE init_1Dgrid_distr
! write(*,*) Nr
local_nkr = (Nr/2+1)/num_procs_kr
! write(*,*) local_nkr
local_nkr_offset = rank_kr*local_nkr
if (rank_kr .EQ. num_procs_kr-1) local_nkr = (Nr/2+1)-local_nkr_offset
END SUBROUTINE init_1Dgrid_distr
SUBROUTINE set_pgrid
USE prec_const
IMPLICIT NONE
INTEGER :: ip, istart, iend, in
! Local data distribution
CALL decomp1D(pmaxe+1, num_procs_p, rank_p, ips_e, ipe_e)
CALL decomp1D(pmaxi+1, num_procs_p, rank_p, ips_i, ipe_i)
local_np_e = ipe_e - ips_e + 1
local_np_i = ipe_i - ips_i + 1
! List of shift and local numbers between the different processes (used in scatterv and gatherv)
ALLOCATE(counts_np_e (1:num_procs_p))
ALLOCATE(counts_np_i (1:num_procs_p))
ALLOCATE(displs_np_e (1:num_procs_p))
ALLOCATE(displs_np_i (1:num_procs_p))
DO in = 0,num_procs_p-1
CALL decomp1D(pmaxe+1, num_procs_p, in, istart, iend)
counts_np_e(in+1) = iend-istart+1
displs_np_e(in+1) = istart-1
CALL decomp1D(pmaxi+1, num_procs_p, in, istart, iend)
counts_np_i(in+1) = iend-istart+1
displs_np_i(in+1) = istart-1
ENDDO
! local grid computation
ALLOCATE(parray_e(ips_e:ipe_e))
ALLOCATE(parray_i(ips_i:ipe_i))
DO ip = ips_e,ipe_e; parray_e(ip) = (ip-1); END DO
DO ip = ips_i,ipe_i; parray_i(ip) = (ip-1); END DO
! Ghosts boundaries
ipsg_e = ips_e - 2; ipeg_e = ipe_e + 2;
ipsg_i = ips_i - 2; ipeg_i = ipe_i + 2;
! Precomputations
pmaxe_dp = real(pmaxe,dp)
pmaxi_dp = real(pmaxi,dp)
END SUBROUTINE set_pgrid
SUBROUTINE set_jgrid
USE prec_const
IMPLICIT NONE
INTEGER :: ij
ijs_e = 1; ije_e = jmaxe + 1
ijs_i = 1; ije_i = jmaxi + 1
ALLOCATE(jarray_e(ijs_e:ije_e))
ALLOCATE(jarray_i(ijs_i:ije_i))
DO ij = ijs_e,ije_e; jarray_e(ij) = ij-1; END DO
DO ij = ijs_i,ije_i; jarray_i(ij) = ij-1; END DO
maxj = MAX(jmaxi, jmaxe)
! Ghosts boundaries
ijsg_e = ijs_e - 1; ijeg_e = ije_e + 1;
ijsg_i = ijs_i - 1; ijeg_i = ije_i + 1;
! Precomputations
jmaxe_dp = real(jmaxe,dp)
jmaxi_dp = real(jmaxi,dp)
END SUBROUTINE set_jgrid
SUBROUTINE set_krgrid
USE prec_const
IMPLICIT NONE
INTEGER :: i_
Nkr = Nr/2+1 ! Defined only on positive kr since fields are real
! Start and END indices of grid
ikrs = local_nkr_offset + 1
ikre = ikrs + local_nkr - 1
ALLOCATE(krarray(ikrs:ikre))
! Grid spacings
IF (Lr .EQ. 0) THEN
deltakr = 1._dp
ELSE
deltakr = 2._dp*PI/Lr
ENDIF
! Discretized kr positions ordered as dk*(0 1 2 3)
DO ikr = ikrs,ikre
krarray(ikr) = REAL(ikr-1,dp) * deltakr
IF (krarray(ikr) .EQ. 0) ikr_0 = ikr
END DO
! Orszag 2/3 filter
two_third_krmax = 2._dp/3._dp*deltakr*Nkr
ALLOCATE(AA_r(ikrs:ikre))
DO ikr = ikrs,ikre
IF ( (krarray(ikr) .LT. two_third_krmax) ) THEN
AA_r(ikr) = 1._dp;
ELSE
AA_r(ikr) = 0._dp;
ENDIF
END DO
END SUBROUTINE set_krgrid
SUBROUTINE set_kzgrid
USE prec_const
IMPLICIT NONE
INTEGER :: i_, counter
Nkz = Nz;
! Start and END indices of grid
ikzs = 1
ikze = Nkz
ALLOCATE(kzarray(ikzs:ikze))
! Grid spacings and discretized kz positions ordered as dk*(0 1 2 3 -2 -1)
IF (Lz .EQ. 0) THEN ! 1D linear case
deltakz = 1._dp
kzarray(1) = 0
ikz_0 = 1
ELSE
deltakz = 2._dp*PI/Lz
DO ikz = ikzs,ikze
kzarray(ikz) = deltakz*(MODULO(ikz-1,Nkz/2)-Nkz/2*FLOOR(2.*real(ikz-1)/real(Nkz)))
if (ikz .EQ. Nz/2+1) kzarray(ikz) = -kzarray(ikz)
IF (kzarray(ikz) .EQ. 0) ikz_0 = ikz
END DO
ENDIF
! Orszag 2/3 filter
two_third_kzmax = 2._dp/3._dp*deltakz*(Nkz/2);
ALLOCATE(AA_z(ikzs:ikze))
DO ikz = ikzs,ikze
IF ( (kzarray(ikz) .GT. -two_third_kzmax) .AND. (kzarray(ikz) .LT. two_third_kzmax) ) THEN
AA_z(ikz) = 1._dp;
ELSE
AA_z(ikz) = 0._dp;
ENDIF
END DO
END SUBROUTINE set_kzgrid
SUBROUTINE set_kpgrid !Precompute the grid of kperp
IMPLICIT NONE
INTEGER :: ikz_sym, tmp_, counter
REAL(dp):: local_kp_min, local_kp_max
! Find the min and max kperp to load subsequent GK matrices
local_kp_min = krarray(ikrs) !smallest local kperp is on the kr axis
local_kp_max = SQRT(krarray(ikre)**2 + kzarray(Nkz/2+1)**2)
ikps = ikrs
ikpe = INT(CEILING(local_kp_max/deltakr))+2
! local number of different kperp
local_nkp = ikpe - ikps + 1
! Allocate 1D array of kperp values and indices
ALLOCATE(kparray(ikps:ikpe))
DO ikp = ikps,ikpe
kparray(ikp) = REAL(ikp-1,dp) * deltakr
ENDDO
write(*,*) rank_kr, ': ikps = ', ikps, 'ikpe = ',ikpe
END SUBROUTINE
SUBROUTINE grid_readinputs
! Read the input parameters
USE prec_const
IMPLICIT NONE
INTEGER :: lu_in = 90 ! File duplicated from STDIN
NAMELIST /GRID/ pmaxe, jmaxe, pmaxi, jmaxi, &
Nr, Lr, Nz, Lz, kpar
READ(lu_in,grid)
END SUBROUTINE grid_readinputs
SUBROUTINE grid_outputinputs(fidres, str)
! Write the input parameters to the results_xx.h5 file
USE futils, ONLY: attach
USE prec_const
IMPLICIT NONE
INTEGER, INTENT(in) :: fidres
CHARACTER(len=256), INTENT(in) :: str
CALL attach(fidres, TRIM(str), "pmaxe", pmaxe)
CALL attach(fidres, TRIM(str), "jmaxe", jmaxe)
CALL attach(fidres, TRIM(str), "pmaxi", pmaxi)
CALL attach(fidres, TRIM(str), "jmaxi", jmaxi)
CALL attach(fidres, TRIM(str), "nr", nr)
CALL attach(fidres, TRIM(str), "Lr", Lr)
CALL attach(fidres, TRIM(str), "nz", nz)
CALL attach(fidres, TRIM(str), "Lz", Lz)
CALL attach(fidres, TRIM(str), "nkr", nkr)
CALL attach(fidres, TRIM(str), "Lkr", Lkr)
CALL attach(fidres, TRIM(str), "nkz", nkz)
CALL attach(fidres, TRIM(str), "Lkz", Lkz)
END SUBROUTINE grid_outputinputs
FUNCTION bare(p_,j_)
IMPLICIT NONE
INTEGER :: bare, p_, j_
bare = (jmaxe+1)*p_ + j_ + 1
END FUNCTION
FUNCTION bari(p_,j_)
IMPLICIT NONE
INTEGER :: bari, p_, j_
bari = (jmaxi+1)*p_ + j_ + 1
END FUNCTION
SUBROUTINE decomp1D( n, numprocs, myid, s, e )
INTEGER :: n, numprocs, myid, s, e
INTEGER :: nlocal
INTEGER :: deficit
nlocal = n / numprocs
s = myid * nlocal + 1
deficit = MOD(n,numprocs)
s = s + MIN(myid,deficit)
IF (myid .LT. deficit) nlocal = nlocal + 1
e = s + nlocal - 1
IF (e .GT. n .OR. myid .EQ. numprocs-1) e = n
END SUBROUTINE decomp1D
END MODULE grid
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