# discrete phase method (volume fraction)

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 March 13, 2010, 16:28 discrete phase method (volume fraction) #1 New Member   heidar alavikia Join Date: Mar 2010 Posts: 3 Rep Power: 9 Hello every body I'm trying to simulate nanofluids in fluent by discrete phase method. But my problem is that I don't know how I can determine the volume fraction of nanoparticle in this model. Please help me if it is possible for you. thanks

 November 30, 2013, 07:52 DPM for nanolfuid #2 Senior Member   Goutam Saha Join Date: Dec 2011 Location: UK Posts: 131 Rep Power: 8 Could you tell me how to setup discrete phase model for nanofluid in fluent? Thanks

 November 30, 2013, 08:57 #3 Senior Member   Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 11 why are u interested in the volume fraction of the particles at the injection when you are modeling everything with langrangian approach: you nedd mass flow rate, diameter injection speed and nothing more.

December 2, 2013, 07:49
#4
Senior Member

Goutam Saha
Join Date: Dec 2011
Location: UK
Posts: 131
Rep Power: 8
Quote:
 Originally Posted by Zaktatir why are u interested in the volume fraction of the particles at the injection when you are modeling everything with langrangian approach: you nedd mass flow rate, diameter injection speed and nothing more.
Thanks for your reply. I considered one phase as a water phase and another phase as a nanoparticle phase. Now I want to do simulation for different volume fraction, phi = 1 to 5 %. This is the Lagrangian approach but how to modelled discrete phase for different volume fraction?

Kind Regards

Goutam

 December 2, 2013, 14:42 #5 Senior Member   Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 11 You are still talking about the volume fraction: in DPM you will get that if you are saving the result of lagrangian tracking on the euler grid that means by activating the mean and RMS values. In the injection you have to adjust the mass flow rate! DPM limitation is 10%

December 3, 2013, 07:05
#6
Senior Member

Goutam Saha
Join Date: Dec 2011
Location: UK
Posts: 131
Rep Power: 8
Quote:
 Originally Posted by Zaktatir You are still talking about the volume fraction: in DPM you will get that if you are saving the result of lagrangian tracking on the euler grid that means by activating the mean and RMS values. In the injection you have to adjust the mass flow rate! DPM limitation is 10%
Thanks. I understood the problem. I am working on laminar flow. I made a setup, but still don't get the correct result. Could you please give me your email address then I will send you my (.cas) fluent file so that you can check my setup if you have time.

Kind Regards

Goutam
Email: g.saha.1@research.gla.ac.uk

 December 3, 2013, 15:42 #7 Senior Member   Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 11 forward the setup to the ansys support

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