how to use mixture model for nanofluids

CANDY · November 10, 2012, 03:15

Dear all,
I am trying to analyze nanofluids numerically using mixture model.
In that secondary phase is not giving the option of using the solid as the material. How to overcome this problem.

thanks in advance.

msaeedsadeghi · November 12, 2012, 06:47

haha

Nanofluid does not mean to import solid nano particles. Nanofluid works just with fluid properties. First you should calculate fluid's new properties (because of nano particles effect on fluid properties) on a paper. Then input the new properties in the material properties.

CANDY · November 13, 2012, 23:24

i want to study the effect of particle size, hence i need to use the mixture model.

eslamian · January 17, 2013, 16:45

Need to use discrete phase model to be able to add the thermophoresis effect.

I am trying to do the same thing, but dont know how to introduce the nanoparticles as a discrete phase. Initially nanoparticles need to be dispersed within the base fluid. Any idea how to do it in FLUENT?

msaeedsadeghi · January 18, 2013, 23:35

Quote:

Originally Posted by eslamian

Need to use discrete phase model to be able to add the thermophoresis effect.

I am trying to do the same thing, but dont know how to introduce the nanoparticles as a discrete phase. Initially nanoparticles need to be dispersed within the base fluid. Any idea how to do it in FLUENT?

Compare nanoparticle equations with ANSYS FLUENT equations, then add every equations needed by UDFs. I am sure fluent can solve it.

Goutam · October 9, 2013, 06:42

Quote:

Originally Posted by CANDY

Dear all,
I am trying to analyze nanofluids numerically using mixture model.
In that secondary phase is not giving the option of using the solid as the material. How to overcome this problem.

thanks in advance.

Hallow, CANDY

Did you able to solve the problem? I am trying to do the same thing, but still didn't able to manage this? If you solved this problem, could you shear your .cas file, how to setup mixture model in Fluent for nanofluid?

Thanks in advance

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

Goutam · November 30, 2013, 06:54

Dear All,

Could you tell me how to setup discrete phase model for nanofluid in Fluent?

thakuramit682 · December 19, 2015, 08:00

Quote:

Originally Posted by CANDY

Dear all,
I am trying to analyze nanofluids numerically using mixture model.
In that secondary phase is not giving the option of using the solid as the material. How to overcome this problem.

thanks in advance.

HI CANDY, have you solved your nanofluid analysing using mixture model? I have the same problem. can you help me with this?
my email id is thakuramit682@gmail.com
thanks in advance

ghofrane · February 23, 2016, 20:20

hi all please i try to use DPM for steady the motion of nanopparticles but i can t give the proporeties of the nanoparticles, there is a list for materials and i dont found my case please help me and thank you very much

rajann_786 · March 23, 2016, 05:54

Please refer this
http://www.sciencedirect.com/science/article/pii/S1290072912003420

mohammad faizan · February 17, 2019, 05:43

Quote:

Originally Posted by thakuramit682

HI CANDY, have you solved your nanofluid analysing using mixture model? I have the same problem. can you help me with this?
my email id is thakuramit682@gmail.com
thanks in advance

Hi thakur, did you solve mixture model problem,... i also have same problem?

my email id is mdfaizan444@gmail.com

abhilasht · February 18, 2019, 05:24

Did anyone solve the problem?

mohammad faizan · February 18, 2019, 09:09

If any any one have solve this problem can share here how to proceed in mixture model.
Thanks

abhilasht · February 20, 2019, 04:00

Dear Gautam,

Did you solve this problem?

abhilasht · April 14, 2020, 06:01

Quote:

Originally Posted by CANDY

Dear all,
I am trying to analyze nanofluids numerically using mixture model.
In that secondary phase is not giving the option of using the solid as the material. How to overcome this problem.

thanks in advance.

If you have solved the problem. Please share the steps.

vinerm · April 14, 2020, 08:46

Modeling of nanofluids via multiphase models, either Eulerian or Lagrangian, is physically irrelevant. These should always be modeled by modifying the fluid properties. These are termed nanofluids and not fluids with nanoparticles, which these really are, because the particles do not really behave that way. Even a 10 nm particle requires a turbulent dissipation rate of the order of $10^{31} m^2/s^3$ for any interaction with flow. This is not really possible. So, nanoparticles do not interact with flow, only with fluid. Hence, you should modify the fluid properties and solve it as single phase flow. Experimentally, we never observed any benefit of nanofluids for thermal diffusion enhancement. It might be beneficial in some fields but not for thermal augmentation.

November 10, 2012, 03:15	how to use mixture model for nanofluids	#1
CANDY New Member CANDYMAN Join Date: Oct 2012 Posts: 6 Rep Power: 13	Dear all, I am trying to analyze nanofluids numerically using mixture model. In that secondary phase is not giving the option of using the solid as the material. How to overcome this problem. thanks in advance. amirokhovat and thakuramit682 like this.

November 30, 2013, 06:54	Dpm	#7
Goutam Senior Member Goutam Saha Join Date: Dec 2011 Location: UK Posts: 131 Rep Power: 14	Dear All, Could you tell me how to setup discrete phase model for nanofluid in Fluent?

February 23, 2016, 20:20	DPM nanofluids	#9
ghofrane New Member ghof Join Date: Nov 2015 Posts: 7 Rep Power: 10	hi all please i try to use DPM for steady the motion of nanopparticles but i can t give the proporeties of the nanoparticles, there is a list for materials and i dont found my case please help me and thank you very much

February 18, 2019, 05:24	Any progress?	#12
abhilasht New Member Abhi Join Date: Jan 2018 Posts: 27 Rep Power: 8	Did anyone solve the problem?

February 18, 2019, 09:09	Two phase mixture model	#13
mohammad faizan New Member mohammad faizan Join Date: Apr 2017 Posts: 5 Rep Power: 9	If any any one have solve this problem can share here how to proceed in mixture model. Thanks

November 12, 2012, 06:47		#2
msaeedsadeghi Senior Member SSL Join Date: Oct 2012 Posts: 226 Rep Power: 14	haha Nanofluid does not mean to import solid nano particles. Nanofluid works just with fluid properties. First you should calculate fluid's new properties (because of nano particles effect on fluid properties) on a paper. Then input the new properties in the material properties.

November 13, 2012, 23:24		#3
CANDY New Member CANDYMAN Join Date: Oct 2012 Posts: 6 Rep Power: 13	i want to study the effect of particle size, hence i need to use the mixture model.

January 17, 2013, 16:45		#4
eslamian New Member Morteza Eslamian Join Date: Jun 2012 Posts: 6 Rep Power: 13	Need to use discrete phase model to be able to add the thermophoresis effect. I am trying to do the same thing, but dont know how to introduce the nanoparticles as a discrete phase. Initially nanoparticles need to be dispersed within the base fluid. Any idea how to do it in FLUENT?

March 23, 2016, 05:54		#10
rajann_786 New Member Rajendra Singh Join Date: Aug 2015 Posts: 16 Rep Power: 10	Please refer this http://www.sciencedirect.com/science/article/pii/S1290072912003420

February 20, 2019, 04:00		#14
abhilasht New Member Abhi Join Date: Jan 2018 Posts: 27 Rep Power: 8	Dear Gautam, Did you solve this problem?

April 14, 2020, 08:46	Nanofluids	#16
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 35	Modeling of nanofluids via multiphase models, either Eulerian or Lagrangian, is physically irrelevant. These should always be modeled by modifying the fluid properties. These are termed nanofluids and not fluids with nanoparticles, which these really are, because the particles do not really behave that way. Even a 10 nm particle requires a turbulent dissipation rate of the order of $10^{31} m^2/s^3$ for any interaction with flow. This is not really possible. So, nanoparticles do not interact with flow, only with fluid. Hence, you should modify the fluid properties and solve it as single phase flow. Experimentally, we never observed any benefit of nanofluids for thermal diffusion enhancement. It might be beneficial in some fields but not for thermal augmentation. Biji.Goli and ezgiiypc like this. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

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