# UDF for nanofluid effective properties

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 January 6, 2016, 22:33 UDF for nanofluid effective properties #1 New Member     Aarthy Meena Join Date: Oct 2015 Location: Trichy Posts: 29 Rep Power: 10 Hello all, I am trying to model nanofluid flow over a 2D circular cylinder using mixture model based multi-phase approach. In literature, I see that the effective properties of the mixture are calculated using theoretical models. But, FLUENT by default calculates it by averaging. I understand that a UDF can be written to this. But, I am unable to guess to which property this UDF must be assigned. Because, in boundary conditions and material properties only the particle and basefluid properties are required to be feeded. Please help me understand this. Thanks in advance. Happy New Year. __________________ Aarthy, PG Student, National Institute of Technology, Trichy, India.

 February 10, 2017, 18:15 nanofluid #2 New Member   ali sarlak Join Date: May 2015 Location: iran Posts: 13 Rep Power: 10 hi dear friend did u find any ufd to change proprty? thanks

February 20, 2019, 01:14
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Join Date: Apr 2017
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Quote:
 Originally Posted by Aarthy Meena Hello all, I am trying to model nanofluid flow over a 2D circular cylinder using mixture model based multi-phase approach. In literature, I see that the effective properties of the mixture are calculated using theoretical models. But, FLUENT by default calculates it by averaging. I understand that a UDF can be written to this. But, I am unable to guess to which property this UDF must be assigned. Because, in boundary conditions and material properties only the particle and basefluid properties are required to be feeded. Please help me understand this. Thanks in advance. Happy New Year.
Hello,
Did you find how to write UDF for that,
i have also some queries..
1) How to calculate mixture viscosity, as the secondary phase is solid.
2) At the inlet, velocity is calculated from the Reynolds number where mixture viscosity is required?
3) Also at the inlet Both secondary phase and primary phase has same velocity which is calculated from Reynolds number?

 Tags fluent - udf, nanofluid, udf

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