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IDProjectCategoryView StatusDate SubmittedLast Update
0001513OpenFOAMBugpublic2015-02-08 11:552015-02-10 09:31
ReporterSvensen Assigned Tohenry  
PrioritynormalSeveritycrashReproducibilityalways
Status resolvedResolutionno change required 
PlatformGNU/LinuxOSUbuntuOS Version14.04
Summary0001513: CrankNicolson unstable
DescriptionUsing CrankNicolson discretezation method with icoFoam solver after some iterations solution explodes, but the first steps was quite good.

According to the bug http://openfoam.org/mantisbt/view.php?id=1468
Does it mean that using:
ddtSchemes
{
    default CrankNicolson 1;
}

in version 2.3.0 will lead to unstable result ?
TagsNo tags attached.

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henry

2015-02-08 17:30

manager   ~0003720

CrankNicolson is less stable than backward and usually requires off-centreing. I would recommend an off-centreing coefficient of 0.9.

Issue History

Date Modified Username Field Change
2015-02-08 11:55 Svensen New Issue
2015-02-08 17:30 henry Note Added: 0003720
2015-02-08 17:30 henry Status new => resolved
2015-02-08 17:30 henry Resolution open => no change required
2015-02-08 17:30 henry Assigned To => henry