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November 21, 2013, 03:54
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Strange Residual Plot
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#1 |
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New Member
Alireza
Join Date: Dec 2010
Posts: 19
Rep Power: 15  |
Hello Every Body
I am trying to model the fluid flow and heat transfer of a nanofluid flow in a straight pipe available in "Experimental investigation of convective heat transfer of Al2O3/water nanofluid in circular tube" By S. Zeinali Heris, M. Nasr Esfahany, S.Gh. Etemad. While running the calculation on Ansys Fluent 14.0 strange residuals come up. I have attached the residuals plot and the modelling summary. It would be my pleasure if you guide me through. |
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November 21, 2013, 16:08
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#2 |
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Senior Member
Join Date: Jan 2010
Location: Germany
Posts: 268
Rep Power: 17 |
With which eulerian approach are you working?
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November 21, 2013, 16:11
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#3 | |
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New Member
Alireza
Join Date: Dec 2010
Posts: 19
Rep Power: 15 |
Quote:
I am working with Eulerian approach |
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November 21, 2013, 16:18
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#4 |
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Senior Member
Join Date: Jan 2010
Location: Germany
Posts: 268
Rep Power: 17 |
Okay Nice: Question
-Interphase momemuntum transfer and heat transfer Modelling -REference DEnsity if gravity is enabled -Diameter of the dispersed Phase -Segregated or Coupled or Fully Coupled -The nature of the Problem: we can not look and seek the paper? Is it a duct flow where the bottom is set with heat flux |
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November 21, 2013, 16:40
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#5 | |
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New Member
Alireza
Join Date: Dec 2010
Posts: 19
Rep Power: 15 |
Quote:
Cillisions:0.9 Heat: ranz-marshall Diameter : 20nm Phase Coupled Simple a duct with constant temperature as wall boundary condition. article link |
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November 25, 2013, 16:12
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#6 |
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Senior Member
Join Date: Jan 2010
Location: Germany
Posts: 268
Rep Power: 17 |
that sounds great with the domain specifications.. Do you have a Contact ID to mail it to the ansys Support...
What about the descritisation of the void, energy and momentum. Did you give you the right material properties? Water and the other phase do not undergo phase change right? Only heat tranfer between the phases assuming the temperature of the dispersed phase to be constant at the staturation point. How is big the void fraction of the disersed phase and the particle loading? Did you calculate the stokes number |
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