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
turbulenceModels
incompressible
LES
DeardorffDiffStress
DeardorffDiffStress.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 "
DeardorffDiffStress.H
"
27
#include <
OpenFOAM/addToRunTimeSelectionTable.H
>
28
29
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
30
31
namespace
Foam
32
{
33
namespace
incompressible
34
{
35
namespace
LESModels
36
{
37
38
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
39
40
defineTypeNameAndDebug
(
DeardorffDiffStress
, 0);
41
addToRunTimeSelectionTable
(LESModel,
DeardorffDiffStress
,
dictionary
);
42
43
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
44
45
void
DeardorffDiffStress::updateSubGridScaleFields(
const
volScalarField
&
K
)
46
{
47
nuSgs_
= ck_*
sqrt
(K)*
delta
();
48
nuSgs_
.
correctBoundaryConditions
();
49
}
50
51
52
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
53
54
DeardorffDiffStress::DeardorffDiffStress
55
(
56
const
volVectorField
&
U
,
57
const
surfaceScalarField
&
phi
,
58
transportModel
& transport
59
)
60
:
61
LESModel(typeName, U, phi, transport),
62
GenSGSStress
(U, phi, transport),
63
64
ck_
65
(
66
dimensioned<scalar>::lookupOrAddToDict
67
(
68
"ck"
,
69
coeffDict_,
70
0.094
71
)
72
),
73
cm_
74
(
75
dimensioned<scalar>::lookupOrAddToDict
76
(
77
"cm"
,
78
coeffDict_,
79
4.13
80
)
81
)
82
{
83
updateSubGridScaleFields(0.5*
tr
(B_));
84
85
printCoeffs();
86
}
87
88
89
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
90
91
void
DeardorffDiffStress::correct
(
const
tmp<volTensorField>
& tgradU)
92
{
93
const
volTensorField
& gradU = tgradU();
94
95
GenSGSStress::correct
(gradU);
96
97
volSymmTensorField
D =
symm
(gradU);
98
99
volSymmTensorField
P = -
twoSymm
(
B_
& gradU);
100
101
volScalarField
K = 0.5*
tr
(
B_
);
102
volScalarField
Epsilon = 2*
nuEff
()*
magSqr
(D);
103
104
fvSymmTensorMatrix
BEqn
105
(
106
fvm::ddt
(
B_
)
107
+
fvm::div
(
phi
(),
B_
)
108
-
fvm::laplacian
(
DBEff
(),
B_
)
109
+
fvm::Sp
(cm_*
sqrt
(K)/
delta
(),
B_
)
110
==
111
P
112
+ 0.8*K*D
113
- (2*
ce_
- 0.667*cm_)*
I
*Epsilon
114
);
115
116
BEqn.
relax
();
117
BEqn.
solve
();
118
119
// Bounding the component kinetic energies
120
121
forAll
(
B_
, celli)
122
{
123
B_
[celli].
component
(
symmTensor::XX
) =
124
max
(
B_
[celli].
component
(
symmTensor::XX
),
k0
().value());
125
B_
[celli].
component
(
symmTensor::YY
) =
126
max
(
B_
[celli].
component
(
symmTensor::YY
),
k0
().value());
127
B_
[celli].
component
(
symmTensor::ZZ
) =
128
max
(
B_
[celli].
component
(
symmTensor::ZZ
),
k0
().value());
129
}
130
131
K = 0.5*
tr
(
B_
);
132
bound
(K,
k0
());
133
134
updateSubGridScaleFields(K);
135
}
136
137
138
bool
DeardorffDiffStress::read
()
139
{
140
if
(
GenSGSStress::read
())
141
{
142
ck_.
readIfPresent
(
coeffDict
());
143
cm_.
readIfPresent
(
coeffDict
());
144
145
return
true
;
146
}
147
else
148
{
149
return
false
;
150
}
151
}
152
153
154
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
155
156
}
// End namespace LESModels
157
}
// End namespace incompressible
158
}
// End namespace Foam
159
160
// ************************ vim: set sw=4 sts=4 et: ************************ //