CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Programming & Development

boxTurb16 and dnsFoam : finer grids.

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

LinkBack Thread Tools Display Modes
Old   September 25, 2013, 10:27
Default boxTurb16 and dnsFoam : finer grids.
Zeno Belligoli
Join Date: Sep 2013
Location: Delft, The Netherlands
Posts: 41
Rep Power: 4
Zen is on a distinguished road
Hello everybody,

I am working with dnsFoam on decaying isotropic turbulence.

I have followed the tutorial " A boxturb16 and dnsFoam tutorial" available to everyone online.

I tried to refine the grid first with a 32x32x32 grid and then with a 64x64x64 grid.
The results for the enrgy spectrum are curious though.

For the 32-grid case, when I plot the enrgy spectrum in tecplot, the slope of the "-5/3 part of the graph" is -3.9 .
The only thing that changed from the 16-grid case is deltaT, which was decreased (as obvious for a finer grid).

Any idea of the reason for this behaviour?

Thanks in advance,

Zen is offline   Reply With Quote


boxturb16, dnsfoam, isotropic turbulence, openfoam 2.1.1

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
dnsFoam boxturb16 tonyuprm OpenFOAM 0 September 28, 2010 14:15

All times are GMT -4. The time now is 20:05.