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Active Member
chien_fu
Posts: 10
Registered: ‎10-26-2011
Accepted Solution

Looking for Particle residence time

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11-03-2011 06:18 AM

I have some very slow moving particles at a particular point in my analysis.  I'm looking to determine the total amount of time that it takes them to get from the inlet to the oulet of the system.  Is there a way determine the amount of time it takes one particle to travel through the system?  Alternatively, is there a way to plot the velocity of a particle over its parametric distance of travel through the system?

Also, is there a way to determine which particles are completely stagnant?

 

Thank you.

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Alumni
marco.mueller
Posts: 35
Registered: ‎08-30-2011

Re: Looking for Particle residence time

11-03-2011 06:34 AM in reply to: chien_fu

I guess you are looking for this?

 

03.11.png

 

the selected one(s) get highlighted white.



Marco Müller
Product Support Specialist
Digital Simulation
Autodesk, Inc.
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Active Member
chien_fu
Posts: 10
Registered: ‎10-26-2011

Re: Looking for Particle residence time

11-03-2011 06:56 AM in reply to: marco.mueller

Yes partially, thank you.

What does it mean when a particle trace terminates in the middle of the model?  Does that mean it becomes completely stagnant in equilibrium?

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Product Support
Royce_adsk
Posts: 578
Registered: ‎08-24-2011

Re: Looking for Particle residence time

11-03-2011 07:06 AM in reply to: chien_fu

Another possibility that you could look at is Local Mean Age or (LMA)

 

Result Quantities

 

This would give you an idea of how long it would take for fluid to exit the model from a certain area in your model.  If you look at the LMA value at the inlet that would tell you how long it takes the fluid at the inlet to exit the model.  This can be very useful for finding stagnent regions in your model and is used very often in the AEC industry.



Royce Abel
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Active Member
chien_fu
Posts: 10
Registered: ‎10-26-2011

Re: Looking for Particle residence time

11-03-2011 08:00 AM in reply to: Royce_adsk

Thanks.

I'm re running now with this quantity included.

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