FLUENT two-phase mixture method for nanofluids

Lancashire · October 12, 2016, 13:47

I need to compare results for a simulation with nanofluids in a coiled tube using the single-phase and the two-phase mixture methods in FLUENT. The single-phase method works perfectly well. However, I am confused with the development of the two-phase Mixture model. The pertinent literature states that the fluid properties need to be defined through the use of the effective properties (as in the single-phase simulations). Hence, I am not sure how to define the model in FLUENT.

Therefore, if we define a Mixture model with two-phases, my understanding is that the base fluid properties (water) will be defined with UDF’s for the effective properties. Then how can be define the properties of the nanoparticles i.e. The second phase?

Am I right to assume that for the second phase, the granular option needs to be activated? This will then allow us to define the diameter….

Lancashire · October 18, 2016, 10:55

Hello! Is there anyone out there who is able to give a hand with this

bazaee · October 19, 2016, 12:44

send your case&data for me.
i can fix it for you.
best regard

bazaee · October 19, 2016, 12:45

Bazaee.Hassan@gmail.com

pankajadgjmp · April 4, 2017, 04:53

why udf ?
simply select water as your primary fluid. And yes granular needs to be activated.
i have done this but the simulation has failed till now because if i set the dia as e^-9. And if i set it around e^-6 or above the simulation runs fine.

if you have any answer to the above problem please let me know.

accessaccount32@hotmail.com

thanks

pankajadgjmp · April 4, 2017, 04:54

did you find any solution??

Taheri · April 5, 2021, 11:09

Quote:

Originally Posted by Lancashire

I need to compare results for a simulation with nanofluids in a coiled tube using the single-phase and the two-phase mixture methods in FLUENT. The single-phase method works perfectly well. However, I am confused with the development of the two-phase Mixture model. The pertinent literature states that the fluid properties need to be defined through the use of the effective properties (as in the single-phase simulations). Hence, I am not sure how to define the model in FLUENT.

Therefore, if we define a Mixture model with two-phases, my understanding is that the base fluid properties (water) will be defined with UDF’s for the effective properties. Then how can be define the properties of the nanoparticles i.e. The second phase?

Am I right to assume that for the second phase, the granular option needs to be activated? This will then allow us to define the diameter….

Hi
I have a problem similar to yours. Were you able to solve it?

October 12, 2016, 13:47	FLUENT two-phase mixture method for nanofluids	#1
Lancashire New Member Andrew Vella Join Date: Feb 2015 Posts: 12 Rep Power: 11	I need to compare results for a simulation with nanofluids in a coiled tube using the single-phase and the two-phase mixture methods in FLUENT. The single-phase method works perfectly well. However, I am confused with the development of the two-phase Mixture model. The pertinent literature states that the fluid properties need to be defined through the use of the effective properties (as in the single-phase simulations). Hence, I am not sure how to define the model in FLUENT. Therefore, if we define a Mixture model with two-phases, my understanding is that the base fluid properties (water) will be defined with UDF’s for the effective properties. Then how can be define the properties of the nanoparticles i.e. The second phase? Am I right to assume that for the second phase, the granular option needs to be activated? This will then allow us to define the diameter…. pankajadgjmp likes this.

October 19, 2016, 12:44	hi my friend	#3
bazaee New Member hassan Join Date: Jul 2015 Posts: 3 Rep Power: 11	send your case&data for me. i can fix it for you. best regard

October 19, 2016, 12:45	my email address	#4
bazaee New Member hassan Join Date: Jul 2015 Posts: 3 Rep Power: 11	Bazaee.Hassan@gmail.com

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October 18, 2016, 10:55		#2
Lancashire New Member Andrew Vella Join Date: Feb 2015 Posts: 12 Rep Power: 11	Hello! Is there anyone out there who is able to give a hand with this

April 4, 2017, 04:53		#5
pankajadgjmp New Member pankaj sharma Join Date: Feb 2016 Posts: 9 Rep Power: 10	why udf ? simply select water as your primary fluid. And yes granular needs to be activated. i have done this but the simulation has failed till now because if i set the dia as e^-9. And if i set it around e^-6 or above the simulation runs fine. if you have any answer to the above problem please let me know. accessaccount32@hotmail.com thanks

April 4, 2017, 04:54		#6
pankajadgjmp New Member pankaj sharma Join Date: Feb 2016 Posts: 9 Rep Power: 10	did you find any solution??