CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   screwness when mesing with copper scheme and BL (http://www.cfd-online.com/Forums/fluent/42917-screwness-when-mesing-copper-scheme-bl.html)

Ralf Schmidt November 23, 2006 11:12

screwness when mesing with copper scheme and BL
 
Hi!

I have a problem when mesing with copper scheme:

I have as geometry a long rod bundle in a square box. Now, I mesh in the following way:

1. I apply a BL to each face of my rods (to adjust y+ valus)

2. I mesh one of the perpendicular faces to the rods with tri elements.

3. I delete the BL (copper meshing doesn't work with BL). In the face mesh, the BL is still existing

4. I mesh the rod parallel faces of the box with hex-map scheme

5. I mesh the volume with hex/Wedge-copper scheme (sources are the both perpendicular faces)

Now, following happens: the mesh close to the walls which are meshed with map is ok, BUT the mesh on the rods has a screwness - which produces highly screwed elements.

It is like around the rods, the mesh is acting like a screw - and so, it is distorting the cells around them.

Any idea, how to solve that problem???

Ralf

Jason November 27, 2006 10:03

Re: screwness when mesing with copper scheme and B
 
I've had a similar problem before. What we ended up doing was splitting the cylinder faces axially to get an edge along the cylinder, which allowed us to control the mesh along the cylinder. Then we meshed the cylinder faces before meshing the volumes.

Hope this helps, and good luck, Jason

rana November 27, 2006 17:59

Re: screwness when mesing with copper scheme and B
 
Dear friends,

Everything is ok ..but please do not use the word `screwness` instead of `skewness`..it reminds of something else :)

BR

Rana

Ralf Schmidt November 30, 2006 13:30

Re: screwness when mesing with copper scheme and B
 
Hi Jason!

Thanks for your help. I found another way:

meshing the top and bottom edges with the edge mesh tool in the same pattern - that works!

Ralf

Ralf Schmidt November 30, 2006 13:31

Re: screwness when mesing with copper scheme and B
 
Hi Jason!

Thanks for your help. I found another way:

meshing the top and bottom edges of the cylinders with the edge mesh tool in the same pattern - that works!

Ralf


All times are GMT -4. The time now is 10:02.