| 1 | !> @file coriolis.f90 |
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| 2 | !------------------------------------------------------------------------------! |
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| 3 | ! This file is part of the PALM model system. |
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| 4 | ! |
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| 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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| 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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| 17 | ! Copyright 1997-2019 Leibniz Universitaet Hannover |
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| 18 | !------------------------------------------------------------------------------! |
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| 19 | ! |
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| 20 | ! Current revisions: |
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| 21 | ! ----------------- |
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| 22 | ! |
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| 23 | ! |
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| 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: coriolis.f90 4329 2019-12-10 15:46:36Z oliver.maas $ |
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| 27 | ! Renamed wall_flags_0 to wall_flags_static_0 |
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| 28 | ! |
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| 29 | ! 4196 2019-08-29 11:02:06Z gronemeier |
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| 30 | ! Consider rotation of model domain |
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| 31 | ! |
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| 32 | ! 4182 2019-08-22 15:20:23Z scharf |
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| 33 | ! Corrected "Former revisions" section |
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| 34 | ! |
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| 35 | ! 3655 2019-01-07 16:51:22Z knoop |
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| 36 | ! OpenACC port for SPEC |
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| 37 | ! |
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| 38 | ! Revision 1.1 1997/08/29 08:57:38 raasch |
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| 39 | ! Initial revision |
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| 40 | ! |
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| 41 | ! |
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| 42 | ! Description: |
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| 43 | ! ------------ |
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| 44 | !> Computation of all Coriolis terms in the equations of motion. |
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| 45 | !> |
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| 46 | !> @note In this routine the topography is masked, even though this |
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| 47 | !> is again done in prognostic_equations. However, omitting the masking |
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| 48 | !> here lead to slightly different results. Reason unknown. |
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| 49 | !------------------------------------------------------------------------------! |
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| 50 | MODULE coriolis_mod |
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| 51 | |
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| 52 | |
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| 53 | PRIVATE |
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| 54 | PUBLIC coriolis |
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| 55 | |
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| 56 | INTERFACE coriolis |
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| 57 | MODULE PROCEDURE coriolis |
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| 58 | MODULE PROCEDURE coriolis_ij |
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| 59 | END INTERFACE coriolis |
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| 60 | |
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| 61 | CONTAINS |
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| 62 | |
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| 63 | |
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| 64 | !------------------------------------------------------------------------------! |
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| 65 | ! Description: |
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| 66 | ! ------------ |
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| 67 | !> Call for all grid points |
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| 68 | !------------------------------------------------------------------------------! |
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| 69 | SUBROUTINE coriolis( component ) |
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| 70 | |
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| 71 | USE arrays_3d, & |
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| 72 | ONLY: tend, u, ug, v, vg, w |
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| 73 | |
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| 74 | USE basic_constants_and_equations_mod, & |
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| 75 | ONLY: pi |
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| 76 | |
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| 77 | USE control_parameters, & |
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| 78 | ONLY: f, fs, message_string, rotation_angle |
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| 79 | |
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| 80 | USE indices, & |
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| 81 | ONLY: nxl, nxlu, nxr, nyn, nys, nysv, nzb, nzt, wall_flags_static_0 |
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| 82 | |
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| 83 | USE kinds |
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| 84 | |
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| 85 | IMPLICIT NONE |
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| 86 | |
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| 87 | INTEGER(iwp) :: component !< component of momentum equation |
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| 88 | INTEGER(iwp) :: i !< running index x direction |
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| 89 | INTEGER(iwp) :: j !< running index y direction |
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| 90 | INTEGER(iwp) :: k !< running index z direction |
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| 91 | |
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| 92 | REAL(wp) :: cos_rot_angle !< cosine of model rotation angle |
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| 93 | REAL(wp) :: flag !< flag to mask topography |
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| 94 | REAL(wp) :: sin_rot_angle !< sine of model rotation angle |
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| 95 | |
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| 96 | ! |
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| 97 | !-- Precalculate cosine and sine of rotation angle |
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| 98 | cos_rot_angle = COS( rotation_angle * pi / 180.0_wp ) |
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| 99 | sin_rot_angle = SIN( rotation_angle * pi / 180.0_wp ) |
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| 100 | |
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| 101 | ! |
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| 102 | !-- Compute Coriolis terms for the three velocity components |
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| 103 | SELECT CASE ( component ) |
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| 104 | |
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| 105 | ! |
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| 106 | !-- u-component |
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| 107 | CASE ( 1 ) |
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| 108 | !$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i, j, k, flag) & |
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| 109 | !$ACC PRESENT(wall_flags_static_0) & |
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| 110 | !$ACC PRESENT(v, w, vg) & |
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| 111 | !$ACC PRESENT(tend) |
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| 112 | DO i = nxlu, nxr |
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| 113 | DO j = nys, nyn |
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| 114 | DO k = nzb+1, nzt |
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| 115 | ! |
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| 116 | !-- Predetermine flag to mask topography |
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| 117 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_static_0(k,j,i), 1 ) ) |
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| 118 | |
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| 119 | tend(k,j,i) = tend(k,j,i) + flag * & |
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| 120 | ( f & |
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| 121 | * ( 0.25_wp * ( v(k,j,i-1) + v(k,j,i) + v(k,j+1,i-1) + v(k,j+1,i) ) & |
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| 122 | - vg(k) ) & |
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| 123 | - fs * cos_rot_angle & |
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| 124 | * 0.25_wp * ( w(k-1,j,i-1) + w(k-1,j,i) + w(k,j,i-1) + w(k,j,i) ) & |
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| 125 | ) |
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| 126 | ENDDO |
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| 127 | ENDDO |
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| 128 | ENDDO |
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| 129 | |
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| 130 | ! |
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| 131 | !-- v-component |
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| 132 | CASE ( 2 ) |
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| 133 | !$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i, j, k, flag) & |
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| 134 | !$ACC PRESENT(wall_flags_static_0) & |
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| 135 | !$ACC PRESENT(u, w, ug) & |
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| 136 | !$ACC PRESENT(tend) |
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| 137 | DO i = nxl, nxr |
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| 138 | DO j = nysv, nyn |
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| 139 | DO k = nzb+1, nzt |
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| 140 | ! |
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| 141 | !-- Predetermine flag to mask topography |
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| 142 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_static_0(k,j,i), 2 ) ) |
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| 143 | |
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| 144 | tend(k,j,i) = tend(k,j,i) - flag * & |
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| 145 | ( f & |
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| 146 | * ( 0.25_wp * ( u(k,j-1,i) + u(k,j,i) + u(k,j-1,i+1) + u(k,j,i+1) ) & |
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| 147 | - ug(k) ) & |
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| 148 | + fs * sin_rot_angle & |
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| 149 | * 0.25_wp * ( w(k,j,i) + w(k-1,j,i) + w(k,j-1,i) + w(k-1,j-1,i) ) & |
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| 150 | ) |
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| 151 | ENDDO |
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| 152 | ENDDO |
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| 153 | ENDDO |
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| 154 | |
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| 155 | ! |
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| 156 | !-- w-component |
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| 157 | CASE ( 3 ) |
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| 158 | !$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i, j, k, flag) & |
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| 159 | !$ACC PRESENT(wall_flags_static_0) & |
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| 160 | !$ACC PRESENT(u, v) & |
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| 161 | !$ACC PRESENT(tend) |
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| 162 | DO i = nxl, nxr |
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| 163 | DO j = nys, nyn |
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| 164 | DO k = nzb+1, nzt |
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| 165 | ! |
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| 166 | !-- Predetermine flag to mask topography |
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| 167 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_static_0(k,j,i), 3 ) ) |
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| 168 | |
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| 169 | tend(k,j,i) = tend(k,j,i) & |
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| 170 | + fs * 0.25_wp * flag & |
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| 171 | * ( cos_rot_angle & |
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| 172 | * ( u(k,j,i) + u(k+1,j,i) + u(k,j,i+1) + u(k+1,j,i+1) ) & |
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| 173 | + sin_rot_angle & |
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| 174 | * ( v(k,j,i) + v(k+1,j,i) + v(k,j+1,i) + v(k+1,j+1,i) ) & |
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| 175 | ) |
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| 176 | ENDDO |
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| 177 | ENDDO |
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| 178 | ENDDO |
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| 179 | |
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| 180 | CASE DEFAULT |
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| 181 | |
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| 182 | WRITE( message_string, * ) ' wrong component: ', component |
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| 183 | CALL message( 'coriolis', 'PA0173', 1, 2, 0, 6, 0 ) |
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| 184 | |
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| 185 | END SELECT |
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| 186 | |
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| 187 | END SUBROUTINE coriolis |
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| 188 | |
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| 189 | |
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| 190 | !------------------------------------------------------------------------------! |
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| 191 | ! Description: |
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| 192 | ! ------------ |
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| 193 | !> Call for grid point i,j |
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| 194 | !------------------------------------------------------------------------------! |
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| 195 | SUBROUTINE coriolis_ij( i, j, component ) |
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| 196 | |
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| 197 | USE arrays_3d, & |
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| 198 | ONLY: tend, u, ug, v, vg, w |
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| 199 | |
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| 200 | USE basic_constants_and_equations_mod, & |
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| 201 | ONLY: pi |
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| 202 | |
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| 203 | USE control_parameters, & |
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| 204 | ONLY: f, fs, message_string, rotation_angle |
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| 205 | |
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| 206 | USE indices, & |
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| 207 | ONLY: nzb, nzt, wall_flags_static_0 |
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| 208 | |
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| 209 | USE kinds |
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| 210 | |
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| 211 | IMPLICIT NONE |
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| 212 | |
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| 213 | INTEGER(iwp) :: component !< component of momentum equation |
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| 214 | INTEGER(iwp) :: i !< running index x direction |
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| 215 | INTEGER(iwp) :: j !< running index y direction |
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| 216 | INTEGER(iwp) :: k !< running index z direction |
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| 217 | |
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| 218 | REAL(wp) :: cos_rot_angle !< cosine of model rotation angle |
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| 219 | REAL(wp) :: flag !< flag to mask topography |
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| 220 | REAL(wp) :: sin_rot_angle !< sine of model rotation angle |
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| 221 | |
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| 222 | ! |
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| 223 | !-- Precalculate cosine and sine of rotation angle |
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| 224 | cos_rot_angle = COS( rotation_angle * pi / 180.0_wp ) |
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| 225 | sin_rot_angle = SIN( rotation_angle * pi / 180.0_wp ) |
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| 226 | |
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| 227 | ! |
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| 228 | !-- Compute Coriolis terms for the three velocity components |
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| 229 | SELECT CASE ( component ) |
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| 230 | |
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| 231 | ! |
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| 232 | !-- u-component |
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| 233 | CASE ( 1 ) |
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| 234 | DO k = nzb+1, nzt |
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| 235 | ! |
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| 236 | !-- Predetermine flag to mask topography |
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| 237 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_static_0(k,j,i), 1 ) ) |
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| 238 | |
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| 239 | tend(k,j,i) = tend(k,j,i) + flag * & |
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| 240 | ( f & |
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| 241 | * ( 0.25_wp * ( v(k,j,i-1) + v(k,j,i) + v(k,j+1,i-1) + v(k,j+1,i) ) & |
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| 242 | - vg(k) ) & |
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| 243 | - fs * cos_rot_angle & |
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| 244 | * 0.25_wp * ( w(k-1,j,i-1) + w(k-1,j,i) + w(k,j,i-1) + w(k,j,i) ) & |
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| 245 | ) |
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| 246 | ENDDO |
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| 247 | |
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| 248 | ! |
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| 249 | !-- v-component |
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| 250 | CASE ( 2 ) |
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| 251 | DO k = nzb+1, nzt |
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| 252 | ! |
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| 253 | !-- Predetermine flag to mask topography |
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| 254 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_static_0(k,j,i), 2 ) ) |
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| 255 | |
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| 256 | tend(k,j,i) = tend(k,j,i) - flag * & |
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| 257 | ( f & |
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| 258 | * ( 0.25_wp * ( u(k,j-1,i) + u(k,j,i) + u(k,j-1,i+1) + u(k,j,i+1) ) & |
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| 259 | - ug(k) ) & |
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| 260 | + fs * sin_rot_angle & |
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| 261 | * 0.25_wp * ( w(k,j,i) + w(k-1,j,i) + w(k,j-1,i) + w(k-1,j-1,i) ) & |
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| 262 | ) |
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| 263 | ENDDO |
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| 264 | |
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| 265 | ! |
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| 266 | !-- w-component |
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| 267 | CASE ( 3 ) |
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| 268 | DO k = nzb+1, nzt |
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| 269 | ! |
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| 270 | !-- Predetermine flag to mask topography |
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| 271 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_static_0(k,j,i), 3 ) ) |
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| 272 | |
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| 273 | tend(k,j,i) = tend(k,j,i) & |
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| 274 | + fs * 0.25_wp * flag & |
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| 275 | * ( cos_rot_angle & |
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| 276 | * ( u(k,j,i) + u(k+1,j,i) + u(k,j,i+1) + u(k+1,j,i+1) ) & |
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| 277 | + sin_rot_angle & |
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| 278 | * ( v(k,j,i) + v(k+1,j,i) + v(k,j+1,i) + v(k+1,j+1,i) ) & |
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| 279 | ) |
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| 280 | ENDDO |
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| 281 | |
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| 282 | CASE DEFAULT |
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| 283 | |
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| 284 | WRITE( message_string, * ) ' wrong component: ', component |
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| 285 | CALL message( 'coriolis', 'PA0173', 1, 2, 0, 6, 0 ) |
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| 286 | |
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| 287 | END SELECT |
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| 288 | |
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| 289 | END SUBROUTINE coriolis_ij |
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| 290 | |
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| 291 | END MODULE coriolis_mod |
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