CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums

Entries for September 2013

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

Old

Useful article about mesh types

Posted September 23, 2013 at 01:08 by skeptik (CFD notes)

Polyhedral, Tetrahedral, and Hexahedral Mesh Comparison



http://www.symscape.com/polyhedral-t...esh-comparison
Member
Posted in Uncategorized
Views 965 Comments 1 skeptik is offline Edit Tags
Old

NACA23012 numerical modelling, wing body in tube

Posted September 19, 2013 at 07:42 by skeptik (CFD notes)

Result line fit really good.
And it's much more better than 2D calculations of the same airfoil

Cx, Cy
Click image for larger version

Name:	NACA3D_tetra.png
Views:	160
Size:	34.4 KB
ID:	179
Residuals
Click image for larger version

Name:	tetraResiduals_a10.png
Views:	150
Size:	7.6 KB
ID:	180
2D results
Name:  kOmega_Epsilon.jpg
Views: 705
Size:  46.2 KB
Member
Posted in Uncategorized
Views 785 Comments 0 skeptik is offline Edit Tags
Old
Rating: 4 votes, 4.75 average.

OpenFOAM: Interesting cases of bad meshes and bad initial conditions

Posted September 15, 2013 at 06:03 by wyldckat

This year (2013) has been an interesting one for me, regarding OpenFOAM. Even beyond the amazing features that OpenFOAM 2.2 brought to the world (at least to my world) and everything that I keep discovering about it.

This blog post is about the various threads/posts were I took the time to diagnose what was specifically wrong with the case and where the bad results are astonishingly wrong... simply because the details were not easily seen. The list might get updated along time, as I...
Super Moderator
Views 2968 Comments 3 wyldckat is offline Edit Tags
Old

Wave Action Equation Solver for OpenFOAM

Posted September 3, 2013 at 07:18 by egp

Hi Tom,

This sounds like an interesting problem! Ignoring the wave space issue for a moment, I think you need to first cast the problem as a 2D surface using either the finiteArea machinery of 1.6-ext, or the thin film model in 2.2.x (see reactingParcelFilmFoam).

The wave space issue is a bit more complex and I don't have a good recommendation for an elegant solution. Brute force for a fixed number of wave-space bins would be doable, but ugly. What is the typical...
egp's Avatar
egp
Senior Member
Posted in Uncategorized
Views 660 Comments 0 egp is offline Edit Tags

All times are GMT -4. The time now is 07:16.