volume Fraction in Fluent

roopesh99 · June 3, 2013, 12:56

Hi
I am doing ddpm simulation (water and one inch polypropylene pebbles). My column is filled with pebbles but still fluent is showing volume fraction nearly 2.5 %. Anyone can help why we are getting too low volume fraction.
Thanks

delaneyluke · June 4, 2013, 16:11

I don't think you can define the presence of 1" pebbles as discrete particles.
Discrete particles are generally in the order of microns to mm.
You might have to model the column as a porous media with water flowing through,

Regards
Luke

June 3, 2013, 12:56	volume Fraction in Fluent	#1
roopesh99 Member Rupesh Verma Join Date: Jun 2013 Posts: 64 Rep Power: 13	Hi I am doing ddpm simulation (water and one inch polypropylene pebbles). My column is filled with pebbles but still fluent is showing volume fraction nearly 2.5 %. Anyone can help why we are getting too low volume fraction. Thanks

June 4, 2013, 16:11		#2
delaneyluke Senior Member Join Date: Mar 2009 Location: Indiana, US Posts: 186 Rep Power: 17	I don't think you can define the presence of 1" pebbles as discrete particles. Discrete particles are generally in the order of microns to mm. You might have to model the column as a porous media with water flowing through, Regards Luke Mike Romeo likes this.

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