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Pre-processing

Initialize a random velocity field with funkySetFields

Posted November 14, 2016 at 13:31 by kindle
Updated February 23, 2017 at 04:05 by kindle

This is useful for me

Quote:

Originally Posted by Andrea1984

Hi,

I would like to inizialize a random velocity field with funkySetFields. Is it possible?

I've tried something like

{
field U;
expression "vector (0.005*rand(), 0.005*rand(), 0.005*rand())";
}

Do you think this should work?

Thanks in advance

Andrea

And this is link for swak
http://openfoamwiki.net/index.php/Contrib/swak4Foam/Example_initRandomVelocity...

kindle

New Member

Posted in Pre-processing

Views 1720 Comments 0 kindle is offline

blockMesh non-uniform grid

Posted November 10, 2016 at 14:32 by kindle

This way we can estimate already order of magnitude.

Quote:

Originally Posted by hjasak

Actually, the grading factor in blockMesh is defined as the ratio of the last to first cell size, which is much better behaved that defining the number of cells and the geometric expansion ratio. I suppose we have both done the same thing :-)

Hrv

kindle

New Member

Posted in Pre-processing

Views 2216 Comments 0 kindle is offline

non-uniform boundray condition - solution dynamicCode

Posted October 25, 2016 at 05:12 by kindle
Updated October 25, 2016 at 05:14 by kindle (::pow give a smile face)

Modifying the file 0/U the /incompressible/icoFoam/cavity tutorial.

FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
movingWall
{
type ...

kindle

New Member

Posted in Pre-processing

Views 901 Comments 0 kindle is offline

Cylinder Mesh

Posted October 12, 2016 at 11:43 by kindle
Updated October 14, 2016 at 11:04 by kindle

Quote:

Originally Posted by guilherme

hi, how do I do a cylinder with blockmesh? Is it necessary do a quarter of a cylinder and stablish simmetry plane in the lateral faces of it or exists a mean of make a entire cylinder? My cylinder is totally wrong I think.

Could anyone posts a simple mesh to I see?

The first guy attaches cylinderMesh.m4. which is for older Openfoam, writing patches differently.

The second attaches cylinderMesh.txt which is the same as first but compatible with Openfoam...

kindle

New Member

Posted in Pre-processing

Views 792 Comments 0 kindle is offline

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