CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   time scale in brownian force (http://www.cfd-online.com/Forums/fluent/48262-time-scale-brownian-force.html)

Mehdi Asghari May 17, 2008 01:02

time scale in brownian force
 
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



All times are GMT -4. The time now is 11:12.