1 | !*********************************************************************** |
---|
2 | !* Copyright 2012,2013 * |
---|
3 | !* Jerome Brioude, Delia Arnold, Andreas Stohl, Wayne Angevine, * |
---|
4 | !* John Burkhart, Massimo Cassiani, Adam Dingwell, Richard C Easter, Sabine Eckhardt,* |
---|
5 | !* Stephanie Evan, Jerome D Fast, Don Morton, Ignacio Pisso, * |
---|
6 | !* Petra Seibert, Gerard Wotawa, Caroline Forster, Harald Sodemann, * |
---|
7 | !* * |
---|
8 | !* This file is part of FLEXPART WRF * |
---|
9 | !* * |
---|
10 | !* FLEXPART is free software: you can redistribute it and/or modify * |
---|
11 | !* it under the terms of the GNU General Public License as published by* |
---|
12 | !* the Free Software Foundation, either version 3 of the License, or * |
---|
13 | !* (at your option) any later version. * |
---|
14 | !* * |
---|
15 | !* FLEXPART is distributed in the hope that it will be useful, * |
---|
16 | !* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
---|
17 | !* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
---|
18 | !* GNU General Public License for more details. * |
---|
19 | !* * |
---|
20 | !* You should have received a copy of the GNU General Public License * |
---|
21 | !* along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
---|
22 | !*********************************************************************** |
---|
23 | |
---|
24 | |
---|
25 | subroutine re_initialize_particle(zp,ust,wst,h,sigmaw,wp,nrand,ol) |
---|
26 | ! i i i i i i/o i/o |
---|
27 | !zp: particle position |
---|
28 | !ust: velocity scale |
---|
29 | !wst: velocity scale |
---|
30 | !sigmaw: vertical velcotiy standard deviation |
---|
31 | !wp: particle velocity |
---|
32 | !nrand: random number counter |
---|
33 | !=============== CBL skewed vertical profiles and formulation of LHH 1996 with profile of w3 from lHB 2000 ================================================================ |
---|
34 | !=============== LHH formulation has been modified to account for variable density profiles and backward in time or forward in time simulations = |
---|
35 | !=============== by Massimo Cassiani ( mc ) , NILU, 2012-2013 = |
---|
36 | !=============== this routine re-initialize particle velocity if a numerical instability in the cbl scheme met a specific condition = |
---|
37 | !=============== (see routine cbl.f90 and Cassiani et al. 2013 = |
---|
38 | !=============== the particle velocity is extracted from the updraft and downdraft distribution as required = |
---|
39 | !=============== this re-initialization si not perfectly consistent with teh well-mixed condition see Cassiani et al. 2013 for details but the error introduced is small = |
---|
40 | !=============== but for the rpesent this is faste and simpler and shoudl be ok = |
---|
41 | !============================================================================================================================================================================ |
---|
42 | use par_mod, only:pi |
---|
43 | use com_mod, only:ldirect,rannumb |
---|
44 | ! use ieee_arithmetic |
---|
45 | |
---|
46 | implicit none |
---|
47 | |
---|
48 | |
---|
49 | real :: usurad2,usurad2p,C0,costluar4,eps |
---|
50 | parameter (usurad2=0.7071067812,usurad2p=0.3989422804,C0=2,costluar4=0.66667,eps=0.000001) |
---|
51 | |
---|
52 | integer idum,nrand |
---|
53 | real :: wp,zp,ust,wst,h,dens,ddens,sigmaw,dsigmawdz,tlw,dcas,dcas1,ran3,gasdev |
---|
54 | real :: w3,w2,wpold |
---|
55 | real :: z, & |
---|
56 | skew, & |
---|
57 | skew2, & |
---|
58 | radw2, & |
---|
59 | fluarw,fluarw2, & |
---|
60 | rluarw, & |
---|
61 | xluarw, & |
---|
62 | aluarw, & |
---|
63 | bluarw, & |
---|
64 | sigmawa, & |
---|
65 | sigmawb, & |
---|
66 | ath, & |
---|
67 | bth, & |
---|
68 | wb,wa |
---|
69 | real timedir |
---|
70 | real ol,transition |
---|
71 | !--------------------------------------------------------------------------- |
---|
72 | ! print*,'INSIDE INIT',zp,ust,wst,h,sigmaw,wp,nrand |
---|
73 | ! wpold=wp |
---|
74 | nrand=nrand+1 |
---|
75 | dcas1=rannumb(nrand) |
---|
76 | timedir=ldirect !direction of time forward (1) or backward(-1) |
---|
77 | z=zp/h |
---|
78 | |
---|
79 | transition=1. !comment by mc: in this version added transtion fucntion see Cassiani et al. 2013 |
---|
80 | if (-h/ol.lt.15) transition=((sin((((-h/ol)+10.)/10.)*pi)))/2.+0.5 |
---|
81 | |
---|
82 | ! w2=((1.7*(z*(1.-0.7*z)*(1.-z))**(2./3.))+1.e-2)*(wst**2) |
---|
83 | w2=sigmaw*sigmaw !this is correct and use hanna routine if commented it is for test reason |
---|
84 | !w3=(((1.2*z*((1.-z)**(3./2.)))+eps)*wst**3) *1.5 !the 1.5 is to test with increased skeweness see also cbl.f90 |
---|
85 | w3=(((1.2*z*((1.-z)**(3./2.)))+eps)*wst**3) *transition !note added a transition fucntion, comemnt by mc |
---|
86 | skew=w3/(w2**1.5) |
---|
87 | skew2=skew*skew |
---|
88 | radw2=sigmaw !sqrt(w2) |
---|
89 | |
---|
90 | if (skew.ne.0) then ! the limit must be considered explicitly to avoid NaN |
---|
91 | fluarw=costluar4*skew**0.333333333333333 |
---|
92 | fluarw2=fluarw*fluarw |
---|
93 | rluarw=(1.+fluarw2)**3.*skew2/((3.+fluarw2)**2.*fluarw2) !-> r |
---|
94 | xluarw=rluarw**0.5 !(1.+fluarw2)**1.5*skew/((3.+fluarw2)*fluarw) !----> r^1/2 |
---|
95 | else |
---|
96 | fluarw=0. |
---|
97 | fluarw2=0. |
---|
98 | rluarw=0. |
---|
99 | xluarw=0. |
---|
100 | end if |
---|
101 | |
---|
102 | aluarw=0.5*(1.-xluarw/(4.+rluarw)**0.5) |
---|
103 | bluarw=1.-aluarw |
---|
104 | |
---|
105 | sigmawa=radw2*(bluarw/(aluarw*(1.+fluarw2)))**0.5 |
---|
106 | sigmawb=radw2*(aluarw/(bluarw*(1.+fluarw2)))**0.5 |
---|
107 | |
---|
108 | wa=(fluarw*sigmawa) |
---|
109 | wb=(fluarw*sigmawb) |
---|
110 | |
---|
111 | |
---|
112 | |
---|
113 | if ((sign(1.,wp)*timedir).gt.0) then !updraft |
---|
114 | |
---|
115 | 100 wp=(dcas1*sigmawa+wa) |
---|
116 | if (wp.lt.0) then |
---|
117 | nrand=nrand+1 |
---|
118 | dcas1=rannumb(nrand) |
---|
119 | goto 100 |
---|
120 | end if |
---|
121 | wp=wp*timedir |
---|
122 | else if ((sign(1.,wp)*timedir).lt.0) then !downdraft |
---|
123 | 101 wp=(dcas1*sigmawb-wb) |
---|
124 | if (wp.gt.0) then |
---|
125 | nrand=nrand+1 |
---|
126 | dcas1=rannumb(nrand) |
---|
127 | goto 101 |
---|
128 | end if |
---|
129 | wp=wp*timedir |
---|
130 | end if |
---|
131 | !if (ieee_is_nan(wp)) print*,'PROBLEM INSIDE',dcas1,nrand,sigmawa,fluarw,sigmawb,wb,aluarw,fluarw,xluarw,zp,ust,wst,h,sigmaw,wpold,nrand |
---|
132 | return |
---|
133 | end |
---|
134 | |
---|