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
applications
solvers
multiphase
cavitatingFoam
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 | 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
Global
25
setDeltaT
26
27
Description
28
Reset the timestep to maintain a constant maximum courant Number.
29
Reduction of time-step is imediate but increase is damped to avoid
30
unstable oscillations.
31
32
\*---------------------------------------------------------------------------*/
33
34
if
(
adjustTimeStep
)
35
{
36
scalar maxDeltaTFact =
37
min
(
maxCo
/(
CoNum
+ SMALL),
maxAcousticCo
/(
acousticCoNum
+ SMALL));
38
39
scalar deltaTFact =
min
(
min
(maxDeltaTFact, 1.0 + 0.1*maxDeltaTFact), 1.2);
40
41
runTime.setDeltaT
42
(
43
min
44
(
45
deltaTFact*runTime.deltaT().value(),
46
maxDeltaT
47
)
48
);
49
50
Info
<<
"deltaT = "
<< runTime.deltaT().value() <<
endl
;
51
}
52
53
// ************************ vim: set sw=4 sts=4 et: ************************ //