Percentile or histograms based on volume or mass, not on elements

TfG · May 26, 2009, 12:00

Hi,

I want to report some statistics about a flow, such as, which percentage of the volume has lower velocities than some value (e.g. 0.5m/s). I see there is a possibility to build histograms and this could be enough. However, they are based on the number of elements, but each element can have different volume so knowing that 50% of elements have velovities inferior to 0.5 m/s is not of help!!

Do you know any way to achieve this? I was thinking that if Fluent is not able perhaps some postprocessing software like Tecplot360 would fit my needs (i have never used any before).

Thanks in advance

JohnnyMercu · June 29, 2022, 11:54

Hi everyone,

Does someone have a solution to this issue, I would also be interested to know about this feature if it exists.

Thanks,

Johnny

LuckyTran · June 29, 2022, 12:18

Volume integrals exist. CFD-post even gives the option of including weight functions. If you don't have a weight function in your post-processor, you can simply create one via a custom field function.

Threshold parts also exist. Create thresholds above/below your criteria and then make a report on the part.

Solutions exist but but they require a little bit of inside the box thinking.

May 26, 2009, 12:00	Percentile or histograms based on volume or mass, not on elements	#1
TfG New Member Join Date: Mar 2009 Posts: 17 Rep Power: 17	Hi, I want to report some statistics about a flow, such as, which percentage of the volume has lower velocities than some value (e.g. 0.5m/s). I see there is a possibility to build histograms and this could be enough. However, they are based on the number of elements, but each element can have different volume so knowing that 50% of elements have velovities inferior to 0.5 m/s is not of help!! Do you know any way to achieve this? I was thinking that if Fluent is not able perhaps some postprocessing software like Tecplot360 would fit my needs (i have never used any before). Thanks in advance

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June 29, 2022, 11:54		#2
JohnnyMercu New Member Johnny Mercurial Join Date: May 2021 Posts: 6 Rep Power: 4	Hi everyone, Does someone have a solution to this issue, I would also be interested to know about this feature if it exists. Thanks, Johnny

June 29, 2022, 12:18		#3
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,675 Rep Power: 66	Volume integrals exist. CFD-post even gives the option of including weight functions. If you don't have a weight function in your post-processor, you can simply create one via a custom field function. Threshold parts also exist. Create thresholds above/below your criteria and then make a report on the part. Solutions exist but but they require a little bit of inside the box thinking.