Home
Downloads
Documentation
Installation
User Guide
man-pages
API Documentation
README
Release Notes
Changes
License
Support
SourceForge Project
Main Page
Related Pages
Namespaces
Classes
Files
File List
File Members
All
Classes
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Friends
Macros
Pages
src
lagrangian
dieselSpray
spraySubModels
dispersionModel
stochasticDispersionRAS
stochasticDispersionRAS.C
Go to the documentation of this file.
1
/*---------------------------------------------------------------------------*\
2
========= |
3
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4
\\ / O peration |
5
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
6
\\/ M anipulation |
7
-------------------------------------------------------------------------------
8
License
9
This file is part of OpenFOAM.
10
11
OpenFOAM is free software: you can redistribute it and/or modify it
12
under the terms of the GNU General Public License as published by
13
the Free Software Foundation, either version 3 of the License, or
14
(at your option) any later version.
15
16
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19
for more details.
20
21
You should have received a copy of the GNU General Public License
22
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23
24
\*---------------------------------------------------------------------------*/
25
26
#include <
OpenFOAM/error.H
>
27
28
#include "
stochasticDispersionRAS.H
"
29
#include <
OpenFOAM/addToRunTimeSelectionTable.H
>
30
31
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
32
33
namespace
Foam
34
{
35
36
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
37
38
defineTypeNameAndDebug
(stochasticDispersionRAS, 0);
39
40
addToRunTimeSelectionTable
41
(
42
dispersionModel,
43
stochasticDispersionRAS,
44
dictionary
45
);
46
47
48
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
49
50
// Construct from components
51
stochasticDispersionRAS::stochasticDispersionRAS
52
(
53
const
dictionary
& dict,
54
spray
& sm
55
)
56
:
57
dispersionRASModel
(dict, sm)
58
{}
59
60
61
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
62
63
stochasticDispersionRAS::~stochasticDispersionRAS
()
64
{}
65
66
67
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
68
69
void
stochasticDispersionRAS::disperseParcels
()
const
70
{
71
72
const
scalar
cps
= 0.16432;
73
const
vector
one
(1.0, 1.0, 1.0);
74
75
scalar dt =
spray_
.
runTime
().
deltaT
().
value
();
76
const
volScalarField
&
k
=
turbulence
().k();
77
//volVectorField gradk = fvc::grad(k);
78
const
volScalarField
& epsilon =
turbulence
().epsilon();
79
const
volVectorField
&
U
=
spray_
.
U
();
80
81
for
82
(
83
spray::iterator
elmnt
=
spray_
.
begin
();
84
elmnt
!=
spray_
.
end
();
85
++
elmnt
86
)
87
{
88
label celli =
elmnt
().cell();
89
scalar UrelMag =
mag
(
elmnt
().
U
() - U[celli] -
elmnt
().Uturb());
90
91
scalar Tturb =
min
92
(
93
k[celli]/epsilon[celli],
94
cps*
pow
(k[celli], 1.5)/epsilon[celli]/(UrelMag + SMALL)
95
);
96
97
// parcel is perturbed by the turbulence
98
if
(dt < Tturb)
99
{
100
elmnt
().tTurb() += dt;
101
102
if
(
elmnt
().tTurb() > Tturb)
103
{
104
elmnt
().tTurb() = 0.0;
105
106
scalar sigma =
sqrt
(2.0*k[celli]/3.0);
107
vector
dir = 2.0*
spray_
.
rndGen
().
vector01
() - one;
108
dir /=
mag
(dir) + SMALL;
109
110
// numerical recipes... Ch. 7. Random Numbers...
111
scalar x1,x2;
112
scalar rsq = 10.0;
113
while
((rsq > 1.0) || (rsq == 0.0))
114
{
115
x1 = 2.0*
spray_
.
rndGen
().
scalar01
() - 1.0;
116
x2 = 2.0*
spray_
.
rndGen
().
scalar01
() - 1.0;
117
rsq = x1*x1 + x2*x2;
118
}
119
120
scalar fac =
sqrt
(-2.0*
log
(rsq)/rsq);
121
122
fac *=
mag
(x1);
123
124
elmnt
().Uturb() = sigma*fac*dir;
125
126
}
127
}
128
else
129
{
130
elmnt
().tTurb() = GREAT;
131
elmnt
().Uturb() =
vector::zero
;
132
}
133
}
134
}
135
136
137
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
138
139
}
// End namespace Foam
140
141
// ************************ vim: set sw=4 sts=4 et: ************************ //