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-   -   multiphase model (http://www.cfd-online.com/Forums/fluent/112139-multiphase-model.html)

violin January 22, 2013 17:56

multiphase model
 
Hi friends
I have to model ferrofluid with fluent .
I have a big problem.
I have to investigate the flow behaviour in two cylanders with different dimension , in result of experiment that I have , the flow is static in the first , but in fluent I have to have velocity inlet in mixture model until I can give volume fraction of secondry phase.
in experimental result , in the first , ferrofluid is between two cylander and then outer cylander start to rotate ,
can you help me about this problem . tnx alot

wagnerqb January 22, 2013 23:17

Hello,

I think you have a VOF problem and there are some hints to help you:

1- You have to patch your inicial solution, i.e. you will start your simulation with the ferrofluid between the cylinders;

2- Use the VOF method because you have 2 imiscible fluids (ferrofluid, and air)

I am glad to help you.

att.
WagnerQB

Yanlong Li January 23, 2013 09:04

Is your major metallurgy? Do you want to simulate the tapping? I will simulate this process next month. And I think you can seperate it to two parts:
first, just simulate the tapping from one ladle and store the case and data (the volume fraction).
second, use the advanced file as the velocity data to simulate the next process.

violin January 24, 2013 15:36

Quote:

Originally Posted by violin (Post 403413)
Hi friends
I have to model ferrofluid with fluent .
I have a big problem.
I have to investigate the flow behaviour in two cylanders with different dimension , in result of experiment that I have , the flow is static in the first , but in fluent I have to have velocity inlet in mixture model until I can give volume fraction of secondry phase.
in experimental result , in the first , ferrofluid is between two cylander and then outer cylander start to rotate ,
can you help me about this problem . tnx alot

my friend
I try VOF models , thank you for helping me . :):)

violin January 26, 2013 05:28

Quote:

Originally Posted by Yanlong Li (Post 403551)
Is your major metallurgy? Do you want to simulate the tapping? I will simulate this process next month. And I think you can seperate it to two parts:
first, just simulate the tapping from one ladle and store the case and data (the volume fraction).
second, use the advanced file as the velocity data to simulate the next process.

hi friend
my based fluid is paraffin and my nanoparticle is fe2O3 .
what is tapping ?
can you explain more ? . tanx alot .


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