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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80 | !$SIMD |
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81 | DO ij=ij_begin,ij_end |
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82 | psm1(ij)=ps(ij) |
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83 | ENDDO |
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84 | ENDIF |
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85 | |
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86 | ! updates are of the form x1 := x0 + tau*f(x1) |
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87 | !$SIMD |
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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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106 | !$SIMD |
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107 | DO ij=ij_begin,ij_end |
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108 | massm1(ij,l)=mass(ij,l) |
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109 | ENDDO |
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110 | ENDDO |
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111 | END IF |
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112 | |
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113 | ! updates are of the form x1 := x0 + tau*f(x1) |
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114 | DO l=ll_begin,ll_end |
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115 | !$SIMD |
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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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139 | !$SIMD |
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140 | DO ij=ij_begin,ij_end |
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141 | um1(ij+u_right,l)=u(ij+u_right,l) |
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142 | um1(ij+u_lup,l)=u(ij+u_lup,l) |
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143 | um1(ij+u_ldown,l)=u(ij+u_ldown,l) |
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144 | theta_rhodzm1(ij,l)=theta_rhodz(ij,l) |
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145 | ENDDO |
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146 | ENDDO |
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147 | END IF |
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148 | |
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149 | DO l=ll_begin,ll_end |
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150 | !$SIMD |
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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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