1!------------------------------------------------------------------------------- 2 3! This file is part of Code_Saturne, a general-purpose CFD tool. 4! 5! Copyright (C) 1998-2021 EDF S.A. 6! 7! This program is free software; you can redistribute it and/or modify it under 8! the terms of the GNU General Public License as published by the Free Software 9! Foundation; either version 2 of the License, or (at your option) any later 10! version. 11! 12! This program is distributed in the hope that it will be useful, but WITHOUT 13! ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14! FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 15! details. 16! 17! You should have received a copy of the GNU General Public License along with 18! this program; if not, write to the Free Software Foundation, Inc., 51 Franklin 19! Street, Fifth Floor, Boston, MA 02110-1301, USA. 20 21!------------------------------------------------------------------------------- 22!> \file rayive.f90 23!> \brief 1D Radiative scheme - IR H20 and dimere absorption 24 25!> \brief Compute in infrared spectral domain the emeissivity of H2O and dimere 26!------------------------------------------------------------------------------- 27! Arguments 28!______________________________________________________________________________. 29! mode name role 30!______________________________________________________________________________! 31!> \param[out] tauv transmission function for water vapor and dimers 32!> \param[out] dtauv d(tauv)/dz 33!> \param[in] qqqq optical dpeth for water vapor (z,z') 34!> \param[in] xqx effective concentration absorption by water vapor 35!> \param[in] qqqqc idem qqqq for dimers 36!> \param[in] xqc idem xqx for dimers 37!> \param[in] ro air density 38!------------------------------------------------------------------------------- 39subroutine rayive (tauv,dtauv,qqqq,xqx,qqqqc,xqc,ro) 40 41implicit none 42 43!=============================================================================== 44!... declaration des variables externes 45 46double precision tauv,dtauv,qqqq,xqx,qqqqc,xqc,ro 47 48!... declaration des variables internes 49 50double precision u,us,xu,xus,za,dza 51double precision a0,a1,a2,a3,a4,b0,b1,b2,b3,b4 52double precision as0,as1,as2,bs0,bs1,bs2 53double precision abs0,dabs0 54double precision n1,dn1,d1,dd1,t1,dt1,n2,dn2,d2,dd2,t2,dt2 55 56data a0,a1,a2,a3,a4/7.76192d-7,1.33836d-3,1.66649d-1,2.17686 & 57,2.69020/ 58data b0,b1,b2,b3,b4/7.79097d-7,1.36832d-3,1.79601d-1,2.70573 & 59,5.15119/ 60data as0,as1,as2/1.5075d-2,-3.6185d-2,1.9245d-2/ 61data bs0,bs1,bs2/1.5075d-2,1.9547d-1,7.5271d-1/ 62 63!=============================================================================== 64 65u = qqqq/10.d0 66us = qqqqc/10.d0 67xu = xqx/10.d0 68xus = xqc/10.d0 69 70! emissivite de la vapeur d'eau 71 72if(u.ge.0.01d0) then 73 za = 0.24d0*log10(u+0.01d0) + 0.622d0 74 dza = 0.24d0/(u + 0.01d0)/log(10.d0) 75else 76 za = 0.846d0*(u + 3.59d-5)**0.243d0 - 6.9d-2 77 dza = 0.846d0*0.243d0*(u + 3.59d-5)**(0.243d0 - 1.d0) 78endif 79 80! emissivite des dimeres 81 82n1 = a0 + u*(a1 + u*(a2 + u*(a3 + u*a4))) 83dn1 = a1 + u*(2.d0*a2 + u*(3.d0*a3 + u*4.d0*a4)) 84d1 = b0 + u*(b1 + u*(b2 + u*(b3 + u*(b4 + u)))) 85dd1 = b1 + u*(2.d0*b2 + u*(3.d0*b3 + u*(4.d0*b4 + u*5.d0))) 86t1 = n1/d1 87 88dt1 = dn1/d1 - n1*dd1/d1/d1 89 90if(us.le.0.5d0) then 91 n2 = as0 + us*(as1 + us*as2) 92 dn2 = as1 + us*2.d0*as2 93 d2 = bs0 + us*(bs1 + us*(bs2 + us)) 94 dd2 = bs1 + us*(2.d0*bs2 + 3.d0*us) 95 t2 = n2/d2 96 97 dt2 = dn2/d2 - n2*dd2/d2/d2 98else 99 t2 = 0.d0 100 dt2 = 0.d0 101endif 102 103! transmission totale 104 105abs0 = za + 0.4614d0*t1*(1.d0 - t2) 106tauv = 1.d0 - abs0 107dabs0 = (dza*xu + 0.4614d0*(dt1*xu*(1.d0 - t2) - t1*dt2*xus))*ro 108dtauv = -dabs0 109 110return 111end subroutine rayive 112