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

time scale in brownian force

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 17, 2008, 02:02
Default time scale in brownian force
  #1
Mehdi Asghari
Guest
 
Posts: n/a
Hi all;

Just as we know Brownian force is given by this relation:Fb=xi*sqrt(pi*S0/dT) for sub-micron particles .

dT=time scale; Xi=zero-mean, unit variance independent Gaussian random numbers.

My main question is that how time scale(dt) is determined in this formula ?

Another question is how to compare this time scale with time paticle passes on its cell position?

Thanks in advance for any help. M.Asghari

  Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can Brownian force be used in turbulent flow? Chen Fangzhi FLUENT 3 August 3, 2013 14:21
Brownian force model in DPM akr FLUENT 1 January 2, 2010 10:16
time scale in brownian force Mehdi Asghari FLUENT 0 May 17, 2008 02:06
time scale in brownian force & submicron particles Mehdi Asghari FLUENT 0 May 16, 2008 13:42
physical time scale.... real time? soubhik CFX 6 November 7, 2003 03:32


All times are GMT -4. The time now is 19:52.