Nanofluid Modeling at Microchannel Heat-Sink
Hi every all
Pls tell me is it possible to simulate nanofluid as Eulerian two-phase flow in microchannel in FLUENT? I'm working with CFX to model above mentioned problem,but I can't gain correct solution specially for heat transfer equations of two phases,namely dispersed solids and continuous fluid.Do you have appropriate way to overcome this problem in software or I should choice another way? |
Dear Behzad,
Why didn't you use UDS (scalar transport) instead of multi-phase modelling?! Bests, |
Hi Amir
I had never used this option (UDS).Pls explain more about it and tell me how it can be applied to my modeling?Can I obtain a good solution via UDS for nanofluid flow in microchannel?Also tell me,did you never simulate nanoscale flow in FLUENT to assure me about obtaining a reasonable solution in this software? |
You said,probably need to correct other properties.Which properties are your meaning?Can I use conservation equations at default form for nanofluid or it is necessary to correct them?How I can apply Cunningham slip correction factor on the drag coefficient to ensure no-slip condition for flow around a sphere nanoparticle?
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This equation has a conservative form and we are talking about Eulerian approach not lagrangian so we don't have Cunningham factor explicitly; i.e, we implicitly model nano particles, we model their effects; otherwise if you insist on using Lagrangian approach (DPM models) you'll face few bugs in modelling brownian motion. Regarding additional UDFs; they're needed to correct fluid viscosity and density and so on .... Bests, |
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yes you can use fluent and upper version of it(ansys) to model a two-phase flow easily.you can fallow this manner Define>>models>>multiphase>> then you can choose your model,there are 3models (mixture,wet vapor(i think) & eulerian). |
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