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how to give two different fluid at the different inlets ?

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Old   May 19, 2012, 16:13
Default how to give two different fluid at the different inlets ?
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saurabh mangal
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Please tell me how to give two different fluids at the inlet. The problem which I am dealing is of the heat exchanger which deals with two different types of liquid water and ethanol, so at the inlet surface of both the fluids I need to give the particular fluid only, Please tell me what model to use, I have used velocity inlet condition for the inlet.
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Old   May 21, 2012, 07:15
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kumar ravi
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hi ,

first of all you should enable "species Transport " model.

then define the respective fluid's mass / mole fractions at their corresponding inlets.
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Old   May 29, 2012, 07:07
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Tom Mazur
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I'm a beginner in fluent but what about model two different nozzles and in 1st nozzle will be 1 fluid, in second nozzle 2nd fluid?
Or if you need to model two different fluids mix togehter maybe try "tutorial 19 - Using the Mixture and eulerian Multiphase Models" .
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Old   June 12, 2012, 14:21
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Quote:
Originally Posted by liddil View Post
I'm a beginner in fluent but what about model two different nozzles and in 1st nozzle will be 1 fluid, in second nozzle 2nd fluid?
Or if you need to model two different fluids mix togehter maybe try "tutorial 19 - Using the Mixture and eulerian Multiphase Models" .
Are you considering the two fluids immiscible?

If so, you may use VOF or Eulerian Multiphase model with the Immiscible Fluids option checked. Then you can change the boundary type to mass-flow inlet. You should be able to define two different inlet velocities for each one of the phases.
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Old   June 13, 2012, 04:22
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For your case please use the "Multiphase mixture model" and define your fluids by volume fraction at inlet
Eg; Ethanol inlet has Ethanol VF =1 and Water VF = 0..... same for the other inlet

Regards
Luke
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Old   December 7, 2012, 14:48
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Chaudhary
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i want to give fluid and solid particle mixture in shell and tube heat exchanger on shell side at the same inlet .how to do this ? please help me .i m very worried about it because its my final year project .i will be very thankful.
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