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solvers
multiphase
twoPhaseEulerFoam
kEpsilon.H
Go to the documentation of this file.
1
if
(
turbulence
)
2
{
3
if
(
mesh
.changing())
4
{
5
y
.correct();
6
}
7
8
tmp<volTensorField> tgradUb =
fvc::grad
(
Ub
);
9
volScalarField
G = 2*nutb*(tgradUb() &&
dev
(
symm
(tgradUb())));
10
tgradUb.
clear
();
11
12
#include "
../bubbleFoam/wallFunctions.H
"
13
14
// Dissipation equation
15
fvScalarMatrix
epsEqn
16
(
17
fvm::ddt
(
beta
, epsilon)
18
+
fvm::div
(
phib
, epsilon)
19
-
fvm::laplacian
20
(
21
alphaEps
*
nuEffb
, epsilon,
22
"laplacian(DepsilonEff,epsilon)"
23
)
24
==
25
C1
*
beta
*G*epsilon/
k
26
-
fvm::Sp
(
C2
*
beta
*epsilon/
k
, epsilon)
27
);
28
29
#include "
../bubbleFoam/wallDissipation.H
"
30
31
epsEqn.relax();
32
epsEqn.solve();
33
34
epsilon.max(
dimensionedScalar
(
"zero"
, epsilon.dimensions(), 1.0e-15));
35
36
37
// Turbulent kinetic energy equation
38
fvScalarMatrix
kEqn
39
(
40
fvm::ddt
(
beta
,
k
)
41
+
fvm::div
(
phib
,
k
)
42
-
fvm::laplacian
43
(
44
alphak
*nuEffb,
k
,
45
"laplacian(DkEff,k)"
46
)
47
==
48
beta
*G
49
-
fvm::Sp
(
beta
*epsilon/
k
,
k
)
50
);
51
kEqn.relax();
52
kEqn.solve();
53
54
k
.max(
dimensionedScalar
(
"zero"
,
k
.dimensions(), 1.0e-8));
55
56
//- Re-calculate turbulence viscosity
57
nutb =
Cmu
*
sqr
(
k
)/epsilon;
58
59
#include "
../bubbleFoam/wallViscosity.H
"
60
}
61
62
nuEffb
= nutb +
nub
;