[General] Mass flow rate over time

vikingd · December 4, 2019, 07:15

Hello all,

Can any of you please tell me how to plot mass flow rate through a surface over time? I use MESHFREE for my simulation. Its based on the finite pointset method.
since im new to Paraview a step by step solution would be very appreciated.

Thank you all

Stefanie.S.W. · January 10, 2020, 05:06

Hello all,

I would like to do the same analysis.

So far I tired on a slice:
Filter "Calculator" -> Velocity of phase in normal direction to slice * phase fraction
When chosen point data the filter "Integrate Variables" is possible. It seems that it integrates over time and surface, which leads to a total volume over total time. Unfortunately I could not find a good documentation on this.
In addition to trying the IntegrateVariables-Filter I plotted the data from the calculator over time (for every second) and took it times the surface area of the slice. When But that is not very accurate.

My case is a multiphase simulation in OpenFoam and I use a slice (Filter) as surface to monitor the mass flow.

Do you have another approach or do you know a documentary to the filters in paraview?

Thank you in advance!

vikingd · February 20, 2020, 09:17

Hello,

The following method works for me.
Using a slice or clip filter, extract the surface where you wish to calculate mass flow on. Apple the following filters:
-->Generate surface normals
-->Calculator filter ( Density*(Velocity.Normals) )
-->Integrate variables
-->Plot data over time
Hope this helps.

qutadah.r · February 16, 2022, 12:42

Quote:

Originally Posted by Stefanie.S.W.

Hello all,

I would like to do the same analysis.

So far I tired on a slice:
Filter "Calculator" -> Velocity of phase in normal direction to slice * phase fraction
When chosen point data the filter "Integrate Variables" is possible. It seems that it integrates over time and surface, which leads to a total volume over total time. Unfortunately I could not find a good documentation on this.
In addition to trying the IntegrateVariables-Filter I plotted the data from the calculator over time (for every second) and took it times the surface area of the slice. When But that is not very accurate.

My case is a multiphase simulation in OpenFoam and I use a slice (Filter) as surface to monitor the mass flow.

Do you have another approach or do you know a documentary to the filters in paraview?

Thank you in advance!

did this work for you in the end? I am also doing multiphase simulation, but why are you multiplying with phase fraction, density_phase* Velocity_phase on a surface should do it right? I am also trying to calculate mass flow rate over a surface but I do not get any results.... I would appreciate if you share your experience, thanks!

foamiste · February 23, 2022, 03:30

This may help you!

https://youtu.be/vgFL8kv320w

qutadah.r · February 23, 2022, 05:26

Quote:

Originally Posted by foamiste

This may help you!

https://youtu.be/vgFL8kv320w

Thank you! I watch your videos regularly btw, keep up the nice work !

Best Regards,
Qutadah

December 4, 2019, 07:15	Mass flow rate over time	#1
vikingd New Member Viking Join Date: Nov 2019 Posts: 4 Rep Power: 6	Hello all, Can any of you please tell me how to plot mass flow rate through a surface over time? I use MESHFREE for my simulation. Its based on the finite pointset method. since im new to Paraview a step by step solution would be very appreciated. Thank you all Stefanie.S.W. likes this.

February 23, 2022, 03:30	How to Calculate the FlowRate and Plot it Over Time in ParaView	#5
foamiste Senior Member Asmaa Join Date: Mar 2016 Posts: 102 Rep Power: 10	This may help you! https://youtu.be/vgFL8kv320w qutadah.r likes this.

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January 10, 2020, 05:06		#2
Stefanie.S.W. Member Stefanie Wolf Join Date: Nov 2018 Location: Aachen Posts: 32 Rep Power: 7	Hello all, I would like to do the same analysis. So far I tired on a slice: Filter "Calculator" -> Velocity of phase in normal direction to slice * phase fraction When chosen point data the filter "Integrate Variables" is possible. It seems that it integrates over time and surface, which leads to a total volume over total time. Unfortunately I could not find a good documentation on this. In addition to trying the IntegrateVariables-Filter I plotted the data from the calculator over time (for every second) and took it times the surface area of the slice. When But that is not very accurate. My case is a multiphase simulation in OpenFoam and I use a slice (Filter) as surface to monitor the mass flow. Do you have another approach or do you know a documentary to the filters in paraview? Thank you in advance!

February 20, 2020, 09:17		#3
vikingd New Member Viking Join Date: Nov 2019 Posts: 4 Rep Power: 6	Hello, The following method works for me. Using a slice or clip filter, extract the surface where you wish to calculate mass flow on. Apple the following filters: -->Generate surface normals -->Calculator filter ( Density*(Velocity.Normals) ) -->Integrate variables -->Plot data over time Hope this helps.