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nice trick from psymn

Posted October 29, 2012 at 13:53 by diamondx

nice trick from simon:
Quote:
Originally Posted by PSYMN View Post
Another good "trick" is to create quad elements in the right pattern...

You can create elements manually under the Edit Mesh tab.

Just lay them out to form the shape you want, including that little Y block region.

Then Extrude them up into Hexa blocks.

Then File => Blocking => Load from Unstructured mesh will turn those into a blocking file.

Then associate that blocking with
...
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ICEM MRF Interface - Penetrating Elements

Posted October 14, 2012 at 04:01 by survADe

If you have problems by settin up the interface for MRF calculations in ICEM/Fluent have a look here:

http://www.cfd-online.com/Forums/ans...-elements.html
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Moving mesh & LaplaceFaceDecomposition

Posted October 8, 2012 at 21:41 by sunliming

Quote:
Originally Posted by ngj View Post
Hi all

I am doing mesh motion using the laplaceFaceDecomposition method available in OF-1.5-dev. It is running without any problems in serial, however, when I decompose the case, the solver stalls on the very first encounter with mesh.update().

I have made the solver myself, so I used icoDyMFoam on the "movingConeMotion" tutorial, and the same behaviour is found for a decomposed case (2 processors).

My question is twofold: (i) Is it possible to
...
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Convergence moving mesh

Posted October 8, 2012 at 21:40 by sunliming

Quote:
Originally Posted by hjasak View Post
The solver looks fine (well, at least not obviously wrong). However, your residual behaviour indicates a serious problem and my guess is that you have messed up the boundary conditions.

Note that the wall boundary needs to be specified in terms of absolute velocity, so a moving wall with no flux through it will not have fixedValue (0 0 0). If this is the problem use the movingWallVelocity b.c., which corrects the normal component based on the mesh motion.

As a test,
...
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Moving mesh part 2

Posted October 8, 2012 at 21:37 by sunliming

Quote:
Originally Posted by lr103476 View Post
Hi,

The mesh motion works using the latest development code using the oscillatingFixedValue boundary condition. Now I am considering oscillating bodies (flat plates and cylinders) on different grids at low Reynolds numbers to see how the grid motion behaves.

I've got the following questions/remarks:

1) On coarse grids the meh motion performs very nicely, but on finer grids the mesh gots distorted near the body causing the flow solver to diverge. Since
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