[360] | 1 | MODULE explicit_scheme_mod |
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| 2 | USE euler_scheme_mod |
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| 3 | USE prec |
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| 4 | USE domain_mod |
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| 5 | USE field_mod |
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| 6 | IMPLICIT NONE |
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| 7 | PRIVATE |
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| 8 | |
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| 9 | REAL(rstd), DIMENSION(4), PARAMETER :: coef_rk4 = (/ .25, 1./3., .5, 1. /) |
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| 10 | REAL(rstd), DIMENSION(5), PARAMETER :: coef_rk25 = (/ .25, 1./6., 3./8., .5, 1. /) |
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| 11 | |
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| 12 | PUBLIC :: explicit_scheme |
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| 13 | CONTAINS |
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| 14 | |
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| 15 | SUBROUTINE explicit_scheme(it, fluxt_zero) |
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| 16 | USE time_mod |
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| 17 | USE omp_para |
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| 18 | USE caldyn_mod |
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| 19 | USE trace |
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| 20 | USE dimensions |
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| 21 | USE geometry |
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| 22 | ! USE caldyn_gcm_mod, ONLY : req_ps, req_mass |
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| 23 | |
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| 24 | REAL(rstd),POINTER :: q(:,:,:) |
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| 25 | REAL(rstd),POINTER :: phis(:), ps(:) ,psm1(:), psm2(:), dps(:) |
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| 26 | REAL(rstd),POINTER :: u(:,:) , um1(:,:), um2(:,:), du(:,:) |
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| 27 | REAL(rstd),POINTER :: rhodz(:,:), mass(:,:), massm1(:,:), massm2(:,:), dmass(:,:) |
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| 28 | REAL(rstd),POINTER :: theta_rhodz(:,:) , theta_rhodzm1(:,:), theta_rhodzm2(:,:), dtheta_rhodz(:,:) |
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| 29 | REAL(rstd),POINTER :: hflux(:,:),wflux(:,:),hfluxt(:,:),wfluxt(:,:) |
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| 30 | LOGICAL :: fluxt_zero(ndomain) ! set to .TRUE. to start accumulating fluxes in time |
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| 31 | INTEGER :: it,stage |
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| 32 | DO stage=1,nb_stage |
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| 33 | ! CALL checksum(f_ps) |
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| 34 | ! CALL checksum(f_theta_rhodz) |
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| 35 | ! CALL checksum(f_mass) |
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| 36 | CALL caldyn((stage==1) .AND. (MOD(it,itau_out)==0), & |
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| 37 | f_phis,f_ps,f_mass,f_theta_rhodz,f_u, f_q, & |
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| 38 | f_geopot, f_hflux, f_wflux, f_dps, f_dmass, f_dtheta_rhodz, f_du) |
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| 39 | ! CALL checksum(f_dps) |
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| 40 | ! CALL checksum(f_dtheta_rhodz) |
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| 41 | ! CALL checksum(f_dmass) |
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| 42 | SELECT CASE (scheme) |
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| 43 | CASE(euler) |
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| 44 | CALL euler_scheme(.TRUE., fluxt_zero) |
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| 45 | CASE (rk4) |
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| 46 | CALL rk_scheme(stage, coef_rk4) |
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| 47 | CASE (rk25) |
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| 48 | CALL rk_scheme(stage, coef_rk25) |
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| 49 | CASE (mlf) |
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| 50 | CALL leapfrog_matsuno_scheme(stage) |
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| 51 | CASE DEFAULT |
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| 52 | STOP |
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| 53 | END SELECT |
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| 54 | END DO |
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| 55 | |
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| 56 | CONTAINS |
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| 57 | |
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| 58 | SUBROUTINE RK_scheme(stage,coef) |
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| 59 | USE disvert_mod |
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| 60 | INTEGER :: ind, stage |
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| 61 | REAL(rstd), INTENT(IN) :: coef(:) |
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| 62 | REAL(rstd) :: tau |
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| 63 | INTEGER :: i,j,ij,l |
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| 64 | |
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| 65 | CALL trace_start("RK_scheme") |
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| 66 | |
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| 67 | tau = dt*coef(stage) |
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| 68 | |
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| 69 | ! if mass coordinate, deal with ps first on one core |
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| 70 | IF(caldyn_eta==eta_mass) THEN |
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| 71 | IF (is_omp_first_level) THEN |
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| 72 | |
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| 73 | DO ind=1,ndomain |
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| 74 | IF (.NOT. assigned_domain(ind)) CYCLE |
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| 75 | CALL swap_dimensions(ind) |
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| 76 | CALL swap_geometry(ind) |
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| 77 | ps=f_ps(ind) ; psm1=f_psm1(ind) ; dps=f_dps(ind) |
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| 78 | |
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| 79 | IF (stage==1) THEN ! first stage : save model state in XXm1 |
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[487] | 80 | !DIR$ SIMD |
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[360] | 81 | DO ij=ij_begin,ij_end |
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| 82 | psm1(ij)=ps(ij) |
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| 83 | ENDDO |
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| 84 | ENDIF |
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| 85 | |
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| 86 | ! updates are of the form x1 := x0 + tau*f(x1) |
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[487] | 87 | !DIR$ SIMD |
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[360] | 88 | DO ij=ij_begin,ij_end |
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| 89 | ps(ij)=psm1(ij)+tau*dps(ij) |
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| 90 | ENDDO |
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| 91 | ENDDO |
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| 92 | ENDIF |
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| 93 | ! CALL send_message(f_ps,req_ps) |
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| 94 | !ym no overlap for now |
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| 95 | ! CALL wait_message(req_ps) |
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| 96 | |
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| 97 | ELSE ! Lagrangian coordinate, deal with mass |
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| 98 | DO ind=1,ndomain |
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| 99 | IF (.NOT. assigned_domain(ind)) CYCLE |
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| 100 | CALL swap_dimensions(ind) |
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| 101 | CALL swap_geometry(ind) |
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| 102 | mass=f_mass(ind); dmass=f_dmass(ind); massm1=f_massm1(ind) |
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| 103 | |
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| 104 | IF (stage==1) THEN ! first stage : save model state in XXm1 |
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| 105 | DO l=ll_begin,ll_end |
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[487] | 106 | !DIR$ SIMD |
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[360] | 107 | DO ij=ij_begin,ij_end |
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| 108 | massm1(ij,l)=mass(ij,l) |
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| 109 | ENDDO |
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| 110 | ENDDO |
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| 111 | END IF |
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| 112 | |
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| 113 | ! updates are of the form x1 := x0 + tau*f(x1) |
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| 114 | DO l=ll_begin,ll_end |
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[487] | 115 | !DIR$ SIMD |
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[360] | 116 | DO ij=ij_begin,ij_end |
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| 117 | mass(ij,l)=massm1(ij,l)+tau*dmass(ij,l) |
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| 118 | ENDDO |
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| 119 | ENDDO |
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| 120 | END DO |
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| 121 | ! CALL send_message(f_mass,req_mass) |
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| 122 | !ym no overlap for now |
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| 123 | ! CALL wait_message(req_mass) |
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| 124 | |
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| 125 | END IF |
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| 126 | |
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| 127 | ! now deal with other prognostic variables |
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| 128 | DO ind=1,ndomain |
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| 129 | IF (.NOT. assigned_domain(ind)) CYCLE |
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| 130 | CALL swap_dimensions(ind) |
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| 131 | CALL swap_geometry(ind) |
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| 132 | u=f_u(ind) ; du=f_du(ind) ; um1=f_um1(ind) |
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| 133 | theta_rhodz=f_theta_rhodz(ind) |
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| 134 | theta_rhodzm1=f_theta_rhodzm1(ind) |
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| 135 | dtheta_rhodz=f_dtheta_rhodz(ind) |
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| 136 | |
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| 137 | IF (stage==1) THEN ! first stage : save model state in XXm1 |
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| 138 | DO l=ll_begin,ll_end |
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[487] | 139 | !DIR$ SIMD |
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[360] | 140 | DO ij=ij_begin,ij_end |
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| 141 | um1(ij+u_right,l)=u(ij+u_right,l) |
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| 142 | um1(ij+u_lup,l)=u(ij+u_lup,l) |
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| 143 | um1(ij+u_ldown,l)=u(ij+u_ldown,l) |
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| 144 | theta_rhodzm1(ij,l)=theta_rhodz(ij,l) |
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| 145 | ENDDO |
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| 146 | ENDDO |
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| 147 | END IF |
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| 148 | |
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| 149 | DO l=ll_begin,ll_end |
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[487] | 150 | !DIR$ SIMD |
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[360] | 151 | DO ij=ij_begin,ij_end |
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| 152 | u(ij+u_right,l)=um1(ij+u_right,l)+tau*du(ij+u_right,l) |
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| 153 | u(ij+u_lup,l)=um1(ij+u_lup,l)+tau*du(ij+u_lup,l) |
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| 154 | u(ij+u_ldown,l)=um1(ij+u_ldown,l)+tau*du(ij+u_ldown,l) |
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| 155 | theta_rhodz(ij,l)=theta_rhodzm1(ij,l)+tau*dtheta_rhodz(ij,l) |
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| 156 | ENDDO |
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| 157 | ENDDO |
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| 158 | |
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| 159 | IF(stage==nb_stage) THEN ! accumulate mass fluxes at last stage |
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| 160 | hflux=f_hflux(ind); hfluxt=f_hfluxt(ind) |
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| 161 | wflux=f_wflux(ind); wfluxt=f_wfluxt(ind) |
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| 162 | CALL accumulate_fluxes(hflux,wflux, hfluxt,wfluxt, dt,fluxt_zero(ind)) |
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| 163 | END IF |
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| 164 | END DO |
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| 165 | |
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| 166 | CALL trace_end("RK_scheme") |
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| 167 | |
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| 168 | END SUBROUTINE RK_scheme |
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| 169 | |
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| 170 | SUBROUTINE leapfrog_matsuno_scheme(stage) |
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| 171 | IMPLICIT NONE |
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| 172 | INTEGER :: ind, stage |
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| 173 | REAL :: tau |
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| 174 | |
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| 175 | CALL trace_start("leapfrog_matsuno_scheme") |
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| 176 | |
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| 177 | tau = dt/nb_stage |
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| 178 | DO ind=1,ndomain |
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| 179 | IF (.NOT. assigned_domain(ind)) CYCLE |
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| 180 | CALL swap_dimensions(ind) |
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| 181 | CALL swap_geometry(ind) |
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| 182 | |
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| 183 | ps=f_ps(ind) ; u=f_u(ind) ; theta_rhodz=f_theta_rhodz(ind) |
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| 184 | psm1=f_psm1(ind) ; um1=f_um1(ind) ; theta_rhodzm1=f_theta_rhodzm1(ind) |
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| 185 | psm2=f_psm2(ind) ; um2=f_um2(ind) ; theta_rhodzm2=f_theta_rhodzm2(ind) |
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| 186 | dps=f_dps(ind) ; du=f_du(ind) ; dtheta_rhodz=f_dtheta_rhodz(ind) |
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| 187 | |
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| 188 | |
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| 189 | IF (stage==1) THEN |
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| 190 | psm1(:)=ps(:) ; um1(:,:)=u(:,:) ; theta_rhodzm1(:,:)=theta_rhodz(:,:) |
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| 191 | ps(:)=psm1(:)+tau*dps(:) |
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| 192 | u(:,:)=um1(:,:)+tau*du(:,:) |
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| 193 | theta_rhodz(:,:)=theta_rhodzm1(:,:)+tau*dtheta_rhodz(:,:) |
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| 194 | |
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| 195 | ELSE IF (stage==2) THEN |
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| 196 | |
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| 197 | ps(:)=psm1(:)+tau*dps(:) |
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| 198 | u(:,:)=um1(:,:)+tau*du(:,:) |
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| 199 | theta_rhodz(:,:)=theta_rhodzm1(:,:)+tau*dtheta_rhodz(:,:) |
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| 200 | |
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| 201 | psm2(:)=psm1(:) ; theta_rhodzm2(:,:)=theta_rhodzm1(:,:) ; um2(:,:)=um1(:,:) |
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| 202 | psm1(:)=ps(:) ; theta_rhodzm1(:,:)=theta_rhodz(:,:) ; um1(:,:)=u(:,:) |
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| 203 | |
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| 204 | ELSE |
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| 205 | |
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| 206 | ps(:)=psm2(:)+2*tau*dps(:) |
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| 207 | u(:,:)=um2(:,:)+2*tau*du(:,:) |
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| 208 | theta_rhodz(:,:)=theta_rhodzm2(:,:)+2*tau*dtheta_rhodz(:,:) |
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| 209 | |
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| 210 | psm2(:)=psm1(:) ; theta_rhodzm2(:,:)=theta_rhodzm1(:,:) ; um2(:,:)=um1(:,:) |
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| 211 | psm1(:)=ps(:) ; theta_rhodzm1(:,:)=theta_rhodz(:,:) ; um1(:,:)=u(:,:) |
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| 212 | |
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| 213 | ENDIF |
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| 214 | |
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| 215 | ENDDO |
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| 216 | CALL trace_end("leapfrog_matsuno_scheme") |
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| 217 | |
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| 218 | END SUBROUTINE leapfrog_matsuno_scheme |
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| 219 | |
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| 220 | END SUBROUTINE Explicit_scheme |
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| 221 | |
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| 222 | END MODULE explicit_scheme_mod |
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