why different between "number tracked"and "the number of injections“？

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 April 22, 2011, 21:14 why different between "number tracked"and "the number of injections“？ #1 New Member   xiaoyu Join Date: Jan 2011 Posts: 5 Rep Power: 7 using DPM model ,the number of injections is 300/s, mass flow is 0,the injection type is single,transient model ,but when is calculating ,why is the number tracked more than 300 ??? for instance "Advancing DPM injections .... number tracked = 25115, escaped = 311, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0, incomplete_parallel = 0 Parallel particle tracking concurrency: 20%" advencing thanks for your help

 May 6, 2011, 23:25 Relpy #2 New Member   akita Join Date: Dec 2009 Posts: 2 Rep Power: 0 I think this problem related to start and stop time of your DPM. It means that after a definitely time the one more batch of 300 particles was added in your simulation due to unsteady tracking. Therefore the longer time tracking and the higher number of particle injecting. If you do not want like this, you can set start and stop time equal 0, it will be solved.

 May 7, 2011, 01:55 Math.h file #3 New Member   abdullah Alhomidy Join Date: May 2011 Posts: 1 Rep Power: 0 Hi Dear I am using FLUENT V 6.3.26 , could you "appreciated' email me the math.h file that used for building the wind profile equation,in UDF,please? i got error in building the wind profile equation that contains Log function thank you so much. g200504690@kfupm.edu.sa

May 8, 2011, 20:46
#4
New Member

xiaoyu
Join Date: Jan 2011
Posts: 5
Rep Power: 7
Quote:
 Originally Posted by akita I think this problem related to start and stop time of your DPM. It means that after a definitely time the one more batch of 300 particles was added in your simulation due to unsteady tracking. Therefore the longer time tracking and the higher number of particle injecting. If you do not want like this, you can set start and stop time equal 0, it will be solved.
thank u,using your tips ,the problem is sovled . I set start and stop time the same time .

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