[lepetitmort]

problem description:

I want to simulate a case with a moving object.
Can somebody help me and give some ideas for the principal approach.



It should be similar to this project
http://www.youtube.com/watch?v=S-p0uau9nGA

I would solve it in this way:

1. Design the grid of the big rectangle (with a rectangle-shaped hole in the middle)


2. Design grid of the small rectangle with the object in the middle
3. Write a UDF for movement
4. Use the fluent funktion to reshape the grid during the simulation. (dynamic meshing)


My questions:

1. Do I have to divide the 2 rectangles in the mesher or in the geometry-builder?
When I use the Designmodeler, draw the 2 rectangle and the object, click then on "surface from sketches", the space between inner rectangle and circle is empty. And I don't know how to avoid that. Some Ideas?

2. Are there any faults in my plan?
3. Any suggestions to improve it?

[PSYMN]

These are separate overlapping grids? I have never actually solved one of these, but I would guess that you probably need to mesh them separately, not as a single model. Then overlap the mesh models in the solver.

[lepetitmort]

The trick is
1. to make TWO sketches.
2. splitface

[PSYMN]

That will get you your nested box structure, but won't allow the one mesh to fall thru the other... Or do you mean to morph th outer box?

Sorry, I thought you planned for overlapping grids.

[meb]

I think that the problem can be faced using the mesh morphing tool RBF Morph (www.rbf-morph.com).

[PSYMN]

I have looked at a variety of morphing tools and none are more powerful or better integrated into Fluent than RBF-Morph...

Simon