# Averaging LES

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

 July 1, 2008, 14:55 Averaging LES #1 iko Guest   Posts: n/a I'm runnning and LES simulation, and I want to do an averaging of the mean velocity and rms. And as you know for an LES solution, time-averaged data can only be derived by data-sampling and processing. For my first simulation I stored multiple data sets from LES solutions and then compute averaging of several samples (for mean and rms velocity) with matlab and tecplot. As ou imagine it was a tedious task. So I'm thinking now that instead of storing multiple data sets, it is most efficient to define the data-processing up front and execute it on-the-fly. I'd like to know how I can set the Sampling Interval such that Data Sampling for Time Statistics can be performed at the specified frequency? My timestep is 0.2 ms, and my integral time scale is about 20ms. I need a sampling interval of 20 ms, which mean every 100 time step ( 100*0.2=20ms) How can I set the sampling Interval? And is it possible to compute the averaging with fluent (averaging with at least 35 samples) ? Sincerely

 July 1, 2008, 18:23 Re: Averaging LES #2 arkur Guest   Posts: n/a Fluent should do it for you. You need to do any averaging at all.

 July 1, 2008, 18:35 Re: Averaging LES #3 iko Guest   Posts: n/a I know fluent is able to do it, but the question is : how can I set the Sampling Interval?

 July 3, 2008, 05:55 Re: Averaging LES #4 Paolo Lampitella Guest   Posts: n/a In the iterate panel, under options, enable "Data Sampling for Time Statistics" and choose your sampling interval, that is "How many time steps do you want it is going to be?" It's just there; after that the unsteady statistics will be automatically available under "display-contours"

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post huwei CFX 3 February 22, 2015 14:09 Shuo Main CFD Forum 0 October 5, 2008 22:49 Sue Tecplot 0 March 28, 2006 06:46 Jennifer Haque CFX 1 October 26, 2004 06:37 oliver Main CFD Forum 3 September 3, 1998 04:37

All times are GMT -4. The time now is 13:17.