CFD Online Logo CFD Online URL
Home > Forums

Entries for August 2013

Register Blogs Members List Search Today's Posts Mark Forums Read

OpenFoam, SALOME, all free tools for engineers

Loosing precision with symmetryPlane

Posted August 15, 2013 at 04:03 by skeptik (CFD notes)

isn't it?

As i remember sometimes better to use slip BC.

So now with sP BC i have U RMS approx 1e-2 - 1e-1. It's bad.

I've changed BC to slip, so data comes soon
Posted in Uncategorized
Views 918 Comments 2 skeptik is offline Edit Tags

snappyHexMash and 'waved' snapping

Posted August 13, 2013 at 04:54 by skeptik (CFD notes)

I had a problem

I've analyzed the problem successfully today.

Name:  good.jpg
Views: 749
Size:  50.9 KB

1. To prevent such behavior of sHM the mesh should not have 'empty' patches. So if you need prism layer at the symmetryPlane, you should change patch type only on final stage of your meshing process.

Posted in Uncategorized
Views 808 Comments 0 skeptik is offline Edit Tags

Quite Beautiful - spiral tube

Posted August 8, 2013 at 06:59 by skeptik (CFD notes)

Another rare case could be so cool: good mesh, good residuals, good y+. So sad, cause it's not mine PhD work)

Name:  1general.jpg
Views: 658
Size:  28.5 KB
Name:  2big.jpg
Views: 725
Size:  69.6 KB
Name:  3big.jpg
Views: 672
Size:  51.6 KB

It's really interesting, the U profile in spirals. At the peripheral regions flow accelerates, it needs to be investigated in light of heat transfer problems. Also, question about proper turbulence model is opened cause kOmegaSST sometimes gives wrong results in whirled and circular flows....
Attached Thumbnails
Click image for larger version

Name:	residuals1linUpw.png
Views:	208
Size:	7.8 KB
ID:	162  
Attached Images
File Type: jpg yPlus.jpg (20.4 KB, 352 views)
Posted in Uncategorized
Views 1186 Comments 0 skeptik is offline Edit Tags

All times are GMT -4. The time now is 11:08.