CFD Online Discussion Forums

OpenFOAM: Interesting cases of bad meshes and bad initial conditions

Posted September 15, 2013 at 07:03 by wyldckat

This year (2013) has been an interesting one for me, regarding OpenFOAM. Even beyond the amazing features that OpenFOAM 2.2 brought to the world (at least to my world) and everything that I keep discovering about it.

This blog post is about the various threads/posts were I took the time to diagnose what was specifically wrong with the case and where the bad results are astonishingly wrong... simply because the details were not easily seen. The list might get updated along time, as I...

wyldckat

Retired Super Moderator

Posted in Links and tutorials for OpenFOAM and dependencies

Views 7808 Comments 3 wyldckat is offline

Build times for OpenFOAM 2.0.x code with Ubuntu 10.10 with its gcc 4.4.5

Posted August 20, 2011 at 12:41 by wyldckat
Updated August 27, 2011 at 14:36 by wyldckat (Added a few notes)

This post is gathers information about OpenFOAM 2.0.x build times, using the gcc version that comes with Ubuntu 10.10, namely 4.4.5.

_____________ This was initially posted here: http://www.openfoam.com/mantisbt/view.php?id=256 _____________

Since I was curious about using N+1 processes, I've built OpenFOAM 3 times on my machine that has 8GB of DDR2 800MHz and one AMD 1055T X6, using Ubuntu 10.10 with its original gcc version:

1st build with 6 processes;
2nd

...

wyldckat

Retired Super Moderator

Posted in Compiling, building, hacking...

Views 6219 Comments 2 wyldckat is offline

Set (Initial) Internal Fields Using #codeStream

Posted April 23, 2012 at 14:55 by Hisham (Notes for OpenFOAM!)

Tags codestream, field, initial, internal, openfoam

To set up (initial) internal fields of variables according to an expression, one can use the #codeStream feature as:

Code:

internalField  #codeStream
{
    code
    #{
        const IOdictionary& d = static_cast<const IOdictionary&>(dict);
        const fvMesh& mesh = refCast<const fvMesh>(d.db());
        scalarField fld(mesh.nCells(), 12.34);// uniform value of the field as 12.34 or just fld(mesh.nCells())

...

Hisham

Senior Member

Posted in Uncategorized

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MRF mesh generation using snappyHexMesh

Posted November 11, 2010 at 09:28 by amgode

Generating a mesh with a MRF region using snappyHexMesh:

-- using cylinder option (primitive shape available in OF-1.6 and above) and defining it in the geometry sub-dictionary in snappyHexMeshDict

cylinder
{
type searchableCylinder;
point1 (0 0 10);
point2 (0 0 20);
radius 10;
}

Using this as a refinement surface and obtaining the cells inside as a MRF cellZone.

castellatedMeshControls...