[1] | 1 | SUBROUTINE init_rankine |
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| 2 | |
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[1036] | 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later 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 1997-2012 Leibniz University Hannover |
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| 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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[484] | 20 | ! Current revisions: |
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[1] | 21 | ! ----------------- |
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| 22 | ! |
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| 23 | ! Former revisions: |
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| 24 | ! ----------------- |
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[3] | 25 | ! $Id: init_rankine.f90 1036 2012-10-22 13:43:42Z raasch $ |
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[77] | 26 | ! |
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[668] | 27 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 28 | ! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng. |
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| 29 | ! Calls of exchange_horiz are modified. |
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| 30 | ! |
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[110] | 31 | ! 107 2007-08-17 13:54:45Z raasch |
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| 32 | ! Initial profiles are reset to constant profiles |
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| 33 | ! |
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[77] | 34 | ! 75 2007-03-22 09:54:05Z raasch |
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| 35 | ! uxrp, vynp eliminated, 2nd+3rd argument removed from exchange horiz |
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| 36 | ! |
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[3] | 37 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 38 | ! |
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[1] | 39 | ! Revision 1.11 2005/03/26 20:38:49 raasch |
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| 40 | ! Arguments for non-cyclic boundary conditions added to argument list of |
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| 41 | ! routine exchange_horiz |
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| 42 | ! |
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| 43 | ! Revision 1.1 1997/08/11 06:18:43 raasch |
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| 44 | ! Initial revision |
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| 45 | ! |
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| 46 | ! |
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| 47 | ! Description: |
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| 48 | ! ------------ |
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| 49 | ! Initialize a (nondivergent) Rankine eddy with a vertical axis in order to test |
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| 50 | ! the advection terms and the pressure solver. |
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| 51 | !------------------------------------------------------------------------------! |
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| 52 | |
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| 53 | USE arrays_3d |
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| 54 | USE constants |
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| 55 | USE grid_variables |
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| 56 | USE indices |
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| 57 | USE control_parameters |
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| 58 | |
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| 59 | IMPLICIT NONE |
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| 60 | |
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| 61 | INTEGER :: i, ic, j, jc, k, kc1, kc2 |
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| 62 | REAL :: alpha, betrag, radius, rc, uw, vw, x, y |
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| 63 | |
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| 64 | ! |
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| 65 | !-- Default: eddy radius rc, eddy strength z, |
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| 66 | !-- position of eddy centre: ic, jc, kc1, kc2 |
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| 67 | rc = 4.0 * dx |
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| 68 | ic = ( nx+1 ) / 2 |
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| 69 | jc = ic |
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| 70 | kc1 = nzb |
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| 71 | kc2 = nzt+1 |
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| 72 | |
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| 73 | ! |
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[107] | 74 | !-- Reset initial profiles to constant profiles |
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| 75 | IF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) THEN |
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[667] | 76 | DO i = nxlg, nxrg |
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| 77 | DO j = nysg, nyng |
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[107] | 78 | pt(:,j,i) = pt_init |
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| 79 | u(:,j,i) = u_init |
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| 80 | v(:,j,i) = v_init |
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| 81 | ENDDO |
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| 82 | ENDDO |
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| 83 | ENDIF |
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| 84 | |
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| 85 | ! |
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[1] | 86 | !-- Compute the u-component. |
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| 87 | DO i = nxl, nxr |
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| 88 | DO j = nys, nyn |
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| 89 | x = ( i - ic - 0.5 ) * dx |
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| 90 | y = ( j - jc ) * dy |
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| 91 | radius = SQRT( x**2 + y**2 ) |
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| 92 | IF ( radius <= 2.0 * rc ) THEN |
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| 93 | betrag = radius / ( 2.0 * rc ) * 0.08 |
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| 94 | ELSEIF ( radius > 2.0 * rc .AND. radius < 8.0 * rc ) THEN |
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| 95 | betrag = 0.08 * EXP( -( radius - 2.0 * rc ) / 2.0 ) |
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| 96 | ELSE |
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| 97 | betrag = 0.0 |
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| 98 | ENDIF |
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| 99 | |
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| 100 | IF ( x == 0.0 ) THEN |
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| 101 | IF ( y > 0.0 ) THEN |
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| 102 | alpha = pi / 2.0 |
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| 103 | ELSEIF ( y < 0.0 ) THEN |
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| 104 | alpha = 3.0 * pi / 2.0 |
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| 105 | ENDIF |
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| 106 | ELSE |
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| 107 | IF ( x < 0.0 ) THEN |
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| 108 | alpha = ATAN( y / x ) + pi |
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| 109 | ELSE |
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| 110 | IF ( y < 0.0 ) THEN |
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| 111 | alpha = ATAN( y / x ) + 2.0 * pi |
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| 112 | ELSE |
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| 113 | alpha = ATAN( y / x ) |
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| 114 | ENDIF |
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| 115 | ENDIF |
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| 116 | ENDIF |
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| 117 | |
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| 118 | uw = -SIN( alpha ) * betrag |
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| 119 | |
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| 120 | DO k = kc1, kc2 |
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| 121 | u(k,j,i) = u(k,j,i) + uw |
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| 122 | ENDDO |
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| 123 | ENDDO |
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| 124 | ENDDO |
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| 125 | |
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| 126 | ! |
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| 127 | !-- Compute the v-component. |
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| 128 | DO i = nxl, nxr |
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| 129 | DO j = nys, nyn |
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| 130 | x = ( i - ic ) * dx |
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| 131 | y = ( j - jc - 0.5) * dy |
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| 132 | radius = SQRT( x**2 + y**2 ) |
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| 133 | IF ( radius <= 2.0 * rc ) THEN |
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| 134 | betrag = radius / ( 2.0 * rc ) * 0.08 |
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| 135 | ELSEIF ( radius > 2.0 * rc .AND. radius < 8.0 * rc ) THEN |
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| 136 | betrag = 0.08 * EXP( -( radius - 2.0 * rc ) / 2.0 ) |
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| 137 | ELSE |
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| 138 | betrag = 0.0 |
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| 139 | ENDIF |
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| 140 | |
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| 141 | IF ( x == 0.0 ) THEN |
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| 142 | IF ( y > 0.0 ) THEN |
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| 143 | alpha = pi / 2.0 |
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| 144 | ELSEIF ( y < 0.0 ) THEN |
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| 145 | alpha = 3.0 * pi / 2.0 |
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| 146 | ENDIF |
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| 147 | ELSE |
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| 148 | IF ( x < 0.0 ) THEN |
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| 149 | alpha = ATAN( y / x ) + pi |
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| 150 | ELSE |
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| 151 | IF ( y < 0.0 ) THEN |
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| 152 | alpha = ATAN( y / x ) + 2.0 * pi |
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| 153 | ELSE |
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| 154 | alpha = ATAN( y / x ) |
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| 155 | ENDIF |
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| 156 | ENDIF |
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| 157 | ENDIF |
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| 158 | |
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| 159 | vw = COS( alpha ) * betrag |
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| 160 | |
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| 161 | DO k = kc1, kc2 |
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| 162 | v(k,j,i) = v(k,j,i) + vw |
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| 163 | ENDDO |
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| 164 | ENDDO |
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| 165 | ENDDO |
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| 166 | |
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| 167 | ! |
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| 168 | !-- Exchange of boundary values for the velocities. |
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[667] | 169 | CALL exchange_horiz( u, nbgp) |
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| 170 | CALL exchange_horiz( v, nbgp ) |
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[1] | 171 | ! |
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| 172 | !-- Make velocity field nondivergent. |
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| 173 | n_sor = nsor_ini |
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| 174 | CALL pres |
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| 175 | n_sor = nsor |
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| 176 | |
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| 177 | END SUBROUTINE init_rankine |
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