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-   -   DPM diameter mass distribution (http://www.cfd-online.com/Forums/fluent/38754-dpm-diameter-mass-distribution.html)

Wouter November 28, 2005 11:52

DPM diameter mass distribution
 
Is would like to use the Rosin-Rammler distribution for a solid cone injection point. I try to check the size-mass distribution from a DPM sample on a plane in the geometry (from the .dpm file that is created). I do this with the diameter-mass flow information in this file. However, I do not find the distribution specified. Instead I get a uniform distribution of mass. Does anybody have suggestions?

HS November 28, 2005 12:04

Re: DPM diameter mass distribution
 
Perhaps this thread can shed some light?

http://www.cfd-online.com/Forum/flue...cgi?read=27795

Hope that helps!

Wouter November 28, 2005 15:21

Re: DPM diameter mass distribution
 
Thanks HS for pointing me out. This is interesting information, but it appears that this person finally found that the mass distribution did correspond to the R-R distribution (he found the problem for the number distribution). I find the effect both in the number and the mass distribution: both are uniform.


Allan Walsh November 29, 2005 12:32

Re: DPM diameter mass distribution
 
Check out the mass flow represented by each diameter.

Wouter November 30, 2005 04:36

Re: DPM diameter mass distribution
 
That's what I did - create a .dpm file with diameter and mass flow for each particle. Next, create bins with diameter ranges and calculate the summed mass flow for each bin. This gives me a uniform distribution.


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