|January 24, 2009, 14:03||
Hello! I'm doing some simul
Join Date: Mar 2009
Location: Frankfurt, Germany
Posts: 729Rep Power: 11
I'm doing some simulations with water-drops in air using interFoam.
If I decrease the drop size, what is physically happening?
I'm not sure how to describe this in terms of dimensionless number (if there are any).
Is there a dimensionless number how describes the ratio of any kind of force related to surface forces, who includes a length scale?
(Except the Grasshof-number, as buoyancy is negligible.)
Have a nice day.
Schrödingers wife: "What did you do to the cat? It's half dead!"
|January 28, 2009, 16:38||
Grab the book bubbles, drops,
Grab the book bubbles, drops, and particles by Clift, Grace, and Weber.
The non-dimensionless numbers are: Reynolds, Eotovos, Morton, density, and viscosity ratio.
If you decrease the volume of the bubble, The Eotovos and the Reynolds number will decrease.
Put another way, your intertial and buoyant forces will reduce, whereas your surface tension and viscous forces remain the same.
Morton and Eotovos include surface tension.
Hope this helps...
|Thread||Thread Starter||Forum||Replies||Last Post|
|The spectrum of eddy sizes||Li||Main CFD Forum||3||December 24, 2008 04:44|
|Optimal cell sizes||anita||OpenFOAM Meshing Format & General Technical||2||March 28, 2008 12:13|
|double mesh sizes in Fluent||Emily||FLUENT||1||January 6, 2005 05:17|
|optimum grid sizes||yeo||FLUENT||4||December 11, 2002 17:56|
|Any resources for grid-sizes out there?||Jeff Waters||Main CFD Forum||1||March 30, 1999 12:40|