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gyacomo/src/grid_mod.F90
17244ee7e9a9shear_version

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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
INTEGER, PUBLIC, PROTECTED :: pskip = 0 ! variable to skip p degrees or not
! 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_nkr_offset, local_nz, local_nz_offset
! Grids containing position in fourier space
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: krarray
REAL(dp), DIMENSION(:), ALLOCATABLE, PUBLIC :: kzarray
REAL(dp), PUBLIC, PROTECTED :: deltakr, deltakz
INTEGER, PUBLIC, PROTECTED :: ikrs, ikre, ikzs, ikze, a
INTEGER, PUBLIC, PROTECTED :: ikr_0, ikz_0 ! Indices of k-grid origin
INTEGER, PUBLIC :: ikr, ikz, ip, ij ! 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
INTEGER, PUBLIC, PROTECTED :: ips_i,ipe_i, ijs_i,ije_i
! Public Functions
PUBLIC :: set_pj
PUBLIC :: set_krgrid, set_kzgrid
PUBLIC :: grid_readinputs, grid_outputinputs
PUBLIC :: bare, bari
CONTAINS
SUBROUTINE set_pj
USE prec_const
IMPLICIT NONE
INTEGER :: ip, ij
ips_e = 1; ipe_e = pmaxe/(1+pskip) + 1
ips_i = 1; ipe_i = pmaxi/(1+pskip) + 1
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
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)
END SUBROUTINE set_pj
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
IF (my_id .EQ. num_procs-1) ikre = Nkr
!WRITE(*,*) 'ID = ',my_id,' ikrs = ', ikrs, ' ikre = ', 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)
ALLOCATE(krarray(ikrs:ikre))
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_
Nkz = Nz;
! Start and END indices of grid
ikzs = 1
ikze = Nkz
! Grid spacings
IF (Lz .EQ. 0) THEN
deltakz = 1._dp
ELSE
deltakz = 2._dp*PI/Lz
ENDIF
! Discretized kz positions ordered as dk*(0 1 2 3 -2 -1)
ALLOCATE(kzarray(ikzs:ikze))
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
! 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 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
END MODULE grid
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