source: palm/trunk/SOURCE/lpm_calc_liquid_water_content.f90 @ 3049

Last change on this file since 3049 was 3039, checked in by schwenkel, 3 years ago

bugfix for lcm with grid stretching

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1!> @file lpm_calc_liquid_water_content.f90
2!------------------------------------------------------------------------------!
3! This file is part of the PALM model system.
4!
5! PALM is free software: you can redistribute it and/or modify it under the
6! terms of the GNU General Public License as published by the Free Software
7! Foundation, either version 3 of the License, or (at your option) any later
8! version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 1997-2018 Leibniz Universitaet Hannover
18!------------------------------------------------------------------------------!
19!
20! Current revisions:
21! ------------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: lpm_calc_liquid_water_content.f90 3039 2018-05-24 13:13:11Z Giersch $
27! bugfix for lcm with grid stretching
28!
29! 2718 2018-01-02 08:49:38Z maronga
30! Corrected "Former revisions" section
31!
32! 2696 2017-12-14 17:12:51Z kanani
33! Change in file header (GPL part)
34!
35! 2101 2017-01-05 16:42:31Z suehring
36!
37! 2000 2016-08-20 18:09:15Z knoop
38! Forced header and separation lines into 80 columns
39!
40! 1822 2016-04-07 07:49:42Z hoffmann
41! Unused variables removed.
42!
43! 1682 2015-10-07 23:56:08Z knoop
44! Code annotations made doxygen readable
45!
46! 1359 2014-04-11 17:15:14Z hoffmann
47! New particle structure integrated.
48! Kind definition added to all floating point numbers.
49!
50! 1320 2014-03-20 08:40:49Z raasch
51! ONLY-attribute added to USE-statements,
52! kind-parameters added to all INTEGER and REAL declaration statements,
53! kinds are defined in new module kinds,
54! comment fields (!:) to be used for variable explanations added to
55! all variable declaration statements
56!
57! 1036 2012-10-22 13:43:42Z raasch
58! code put under GPL (PALM 3.9)
59!
60! 849 2012-03-15 10:35:09Z raasch
61! initial revision (former part of advec_particles)
62!
63!
64! Description:
65! ------------
66!> Calculate the liquid water content for each grid box.
67!------------------------------------------------------------------------------!
68 SUBROUTINE lpm_calc_liquid_water_content
69 
70
71    USE arrays_3d,                                                             &
72        ONLY:  dzw, ql, ql_v, ql_vp
73
74    USE cloud_parameters,                                                      &
75        ONLY:  rho_l
76
77    USE constants,                                                             &
78        ONLY:  pi
79
80    USE control_parameters,                                                    &
81        ONLY:  dz, message_string, rho_surface
82
83    USE cpulog,                                                                &
84        ONLY:  cpu_log, log_point_s
85
86    USE grid_variables,                                                        &
87        ONLY:  dx, dy
88
89    USE indices,                                                               &
90        ONLY:  nxl, nxr, nyn, nys, nzb, nzt
91
92    USE kinds
93
94    USE particle_attributes,                                                   &
95        ONLY:  grid_particles, number_of_particles, particles, prt_count
96
97    IMPLICIT NONE
98
99    INTEGER(iwp) ::  i   !<
100    INTEGER(iwp) ::  j   !<
101    INTEGER(iwp) ::  k   !<
102    INTEGER(iwp) ::  n   !<
103
104    CALL cpu_log( log_point_s(45), 'lpm_calc_ql', 'start' )
105
106!
107!-- Set water content initially to zero
108    ql = 0.0_wp;  ql_v = 0.0_wp;  ql_vp = 0.0_wp
109
110!
111!-- Calculate for each grid box
112    DO  i = nxl, nxr
113       DO  j = nys, nyn
114          DO  k = nzb+1, nzt
115
116             number_of_particles = prt_count(k,j,i)
117             IF ( number_of_particles <= 0 )  CYCLE
118             particles => grid_particles(k,j,i)%particles(1:number_of_particles)
119
120!
121!--          Calculate the total volume in the boxes (ql_v, weighting factor
122!--          has to beincluded)
123             DO  n = 1, prt_count(k,j,i)
124                ql_v(k,j,i)  = ql_v(k,j,i)  + particles(n)%weight_factor *  &
125                                              particles(n)%radius**3
126             ENDDO
127
128!
129!--          Calculate the liquid water content
130             IF ( ql_v(k,j,i) /= 0.0_wp )  THEN
131                ql(k,j,i) = ql(k,j,i) + rho_l * 1.33333333_wp * pi *           &
132                                        ql_v(k,j,i) /                          &
133                                        ( rho_surface * dx * dy * dzw(k) )
134
135                IF ( ql(k,j,i) < 0.0_wp )  THEN
136                   WRITE( message_string, * )  'LWC out of range: ' , &
137                                               ql(k,j,i),i,j,k
138                   CALL message( 'lpm_calc_liquid_water_content', '', 2, 2, &
139                                 -1, 6, 1 )
140                ENDIF
141
142             ELSE
143
144                ql(k,j,i) = 0.0_wp
145
146             ENDIF
147
148          ENDDO
149       ENDDO
150    ENDDO
151
152    CALL cpu_log( log_point_s(45), 'lpm_calc_ql', 'stop' )
153
154
155 END SUBROUTINE lpm_calc_liquid_water_content
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