OpenFOAM
v2312
The open source CFD toolbox
setDeltaT.H
Go to the documentation of this file.
1
/*---------------------------------------------------------------------------*\
2
========= |
3
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4
\\ / O peration |
5
\\ / A nd | www.openfoam.com
6
\\/ M anipulation |
7
-------------------------------------------------------------------------------
8
Copyright (C) 2011-2017 OpenFOAM Foundation
9
-------------------------------------------------------------------------------
10
License
11
This file is part of OpenFOAM.
12
13
OpenFOAM is free software: you can redistribute it and/or modify it
14
under the terms of the GNU General Public License as published by
15
the Free Software Foundation, either version 3 of the License, or
16
(at your option) any later version.
17
18
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
19
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
20
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21
for more details.
22
23
You should have received a copy of the GNU General Public License
24
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
25
26
Global
27
setDeltaT
28
29
Description
30
Reset the timestep to maintain a constant maximum courant Number.
31
Reduction of time-step is immediate, but increase is damped to avoid
32
unstable oscillations.
33
34
\*---------------------------------------------------------------------------*/
35
36
if
(
adjustTimeStep
)
37
{
38
scalar maxDeltaTFact =
39
min
(
maxCo
/(
CoNum
+ SMALL),
maxAlphaCo
/(
alphaCoNum
+ SMALL));
40
41
scalar deltaTFact =
min
(
min
(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
42
43
runTime
.setDeltaT
44
(
45
min
46
(
47
deltaTFact*
runTime
.deltaTValue(),
48
maxDeltaT
49
)
50
);
51
52
Info
<<
"deltaT = "
<<
runTime
.deltaTValue() <<
endl
;
53
}
54
55
// ************************************************************************* //
runTime
engineTime & runTime
Definition:
createEngineTime.H:13
Foam::endl
Ostream & endl(Ostream &os)
Add newline and flush stream.
Definition:
Ostream.H:531
maxDeltaT
maxDeltaT
Definition:
readEngineTimeControls.H:3
maxAlphaCo
scalar maxAlphaCo
Definition:
porousAlphaCourantNo.H:25
Foam::min
label min(const labelHashSet &set, label minValue=labelMax)
Find the min value in labelHashSet, optionally limited by second argument.
Definition:
hashSets.C:26
CoNum
scalar CoNum
Definition:
compressibleCourantNo.H:25
maxCo
scalar maxCo
Definition:
createTimeControls.H:29
alphaCoNum
scalar alphaCoNum
Definition:
alphaCourantNo.H:41
Foam::Info
messageStream Info
Information stream (stdout output on master, null elsewhere)
adjustTimeStep
bool adjustTimeStep
Definition:
createTimeControls.H:26
applications
solvers
multiphase
VoF
setDeltaT.H
Generated by
1.8.14