CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

fvsolutions relaxation factor

Register Blogs Community New Posts Updated Threads Search

Like Tree1Likes
  • 1 Post By RodriguezFatz

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 8, 2014, 16:22
Default fvsolutions relaxation factor
  #1
New Member
 
Altan
Join Date: Apr 2011
Posts: 13
Rep Power: 15
alyucel is on a distinguished road
hi,
while I was searching tutorials I found something
in some fv solutions

Code:
relaxationFactors
{
    fields
    {
        p               0.3;
    }
    equations
    {
        U               0.7;
        k               0.7;
        omega           0.7;
    }
or

Code:
relaxationFactors
{
    p               0.3;
    U               0.7;
    k               0.7;
    epsilon         0.7;
    R               0.7;
    nuTilda         0.7;
}
what is the differ p in field or not
also some one
Code:
relaxationFactors
{
    fields
    {
    }
    equations
    {
        "U.*"           1;
        "k.*"           1;
        "epsilon.*"     1;
    }
}
what is "U.*"
alyucel is offline   Reply With Quote

Old   October 8, 2014, 16:38
Default
  #2
New Member
 
Altan
Join Date: Apr 2011
Posts: 13
Rep Power: 15
alyucel is on a distinguished road
also
in simpleFoam>>pipeCyclic tutorial
Code:
PIMPLE
{
    nOuterCorrectors 4;
    nCorrectors     1;
    nNonOrthogonalCorrectors 0;
    pRefCell        0;
    pRefValue       0;
}

SIMPLE
{
    nNonOrthogonalCorrectors 0;
    residualControl
    {
        p               1e-2;
        U               1e-3;
        "(k|epsilon)"   1e-3;
    }
}
is it normal simple and pimğle in same fvsolution
alyucel is offline   Reply With Quote

Old   October 9, 2014, 03:30
Default
  #3
Senior Member
 
RodriguezFatz's Avatar
 
Philipp
Join Date: Jun 2011
Location: Germany
Posts: 1,297
Rep Power: 26
RodriguezFatz will become famous soon enough
Hey alyucel, I am not sure about your first question. I am wondering the same thing and never found a good explanation for the syntax.
But to your second post: fvSolution contains info for the solver. The solver "simple" will use all information after the keyword "SIMPLE { ... }". It will just not consider the stuff after "PIMPLE { ...}". So if you have both in one file, you will be able to start your case with both solvers pimple and simple.
wanggl likes this.
__________________
The skeleton ran out of shampoo in the shower.
RodriguezFatz is offline   Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Under relaxation factor for external coupling dhxlxz CFX 10 August 11, 2015 20:52
relaxation factor for PISO algorithm sasanghomi OpenFOAM Running, Solving & CFD 1 February 2, 2013 05:51
under relaxation factor and the steady state jing113cn FLUENT 0 November 2, 2009 12:13
Question on adjusting relaxation factor CFD Rookie Main CFD Forum 3 January 26, 2004 14:37
Relaxation factor Moon Siemens 1 June 13, 2003 11:13


All times are GMT -4. The time now is 06:47.