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dynamic_viscosity.f90
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!**********************************************************************
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! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 *
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! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, *
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! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann *
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! *
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! This file is part of FLEXPART. *
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! *
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! FLEXPART is free software: you can redistribute it and/or modify *
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! it under the terms of the GNU General Public License as published by*
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! the Free Software Foundation, either version 3 of the License, or *
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! (at your option) any later version. *
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! *
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! FLEXPART is distributed in the hope that it will be useful, *
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! but WITHOUT ANY WARRANTY; without even the implied warranty of *
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! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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! GNU General Public License for more details. *
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! *
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! You should have received a copy of the GNU General Public License *
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! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. *
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!**********************************************************************
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! Function calculates dynamic viscosity of air (kg/m/s) as function of
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! temperature (K) using Sutherland's formula
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real
function
viscosity
(t)
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implicit none
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real
:: t
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real
,
parameter
:: c=120.,t_0=291.15,eta_0=1.827e-5
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viscosity
=eta_0*(t_0+c)/(t+c)*(t/t_0)**1.5
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return
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end function
viscosity
viscosity
real function viscosity(t)
Definition:
dynamic_viscosity.f90:25
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