CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   what does mean by diffusion? (http://www.cfd-online.com/Forums/main/13571-what-does-mean-diffusion.html)

john June 4, 2007 06:52

what does mean by diffusion?
 
Sometimes we are saying that, this scheme is more diffusive, lets say Upwind schme is more diffusive. or implicit beyond CFL> 1 is more diffusive. What does mean by that? Is it more numerical diffusion? Pls reply thanks everybody for taking interest.

Mani June 4, 2007 08:23

Re: what does mean by diffusion?
 
>Is it more numerical diffusion?

Yes.

jinwon June 4, 2007 08:43

Re: what does mean by diffusion?
 
It mean that the physical profile such as density, pressure become broaden even though the discontinuity is too narrow.


All times are GMT -4. The time now is 04:03.