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Old   March 12, 2014, 13:18
Default Different fluids, question
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Lenzo
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Hello,

I need to simulate a case where air and two more fluids (gas state too) interact cause convection movements. The good point is that these fluids do not react among themselves.
I am a totally beginner in OpenFoam but I have the user manual and I am learning from there and examples and tutorials that I can find on internet.

My question is: Do I need a multiphase solver for my case? Cause I am not sure if multiphase means more fluids or different states of the same fluid (liquid and gas).
So, if it is not multiphase, then which solver would you recomend me? Or which kind of solvers?

And finally, Do you have tutorials for this solver? Or do you know where I can find them?

wating for your answers
Thank you very much,
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Old   March 13, 2014, 12:54
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Quote:
Originally Posted by lenzo View Post
Hello,

I need to simulate a case where air and two more fluids (gas state too) interact cause convection movements. The good point is that these fluids do not react among themselves.
I am a totally beginner in OpenFoam but I have the user manual and I am learning from there and examples and tutorials that I can find on internet.

My question is: Do I need a multiphase solver for my case? Cause I am not sure if multiphase means more fluids or different states of the same fluid (liquid and gas).
So, if it is not multiphase, then which solver would you recomend me? Or which kind of solvers?

And finally, Do you have tutorials for this solver? Or do you know where I can find them?

wating for your answers
Thank you very much,
Hi,

I believe in your case it is multiphase flow.

I also just started to simulate multiphase flow and I suggest you starting from 'interFoam' (or 'compressibleInterFoam' if it's compressible). You can find those examples in the tutorial folders.

As a starter I found it confusing to read some tutorials because they don't have much comments and explanations. So I think you need to be patient.

Best,
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Old   March 13, 2014, 13:08
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Lenzo
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Quote:
Originally Posted by Prosper View Post
Hi,

I believe in your case it is multiphase flow.
Okay thanks.

Quote:
Originally Posted by Prosper View Post
Hi,

You can find those examples in the tutorial folders.
Yes, I know the tutorial folders...but these tutorials without....a document with explanations like the user manual....it's really hard, even senseless...
Nevermind, the interFoam has the breaking of a dam tutorial explained on the user guide, so I will focus on this one!

Thanks a lot
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Old   March 17, 2014, 12:27
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Joachim Herb
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If you had only two fluids you might be able to use twoLiquidMixingFoam. Have a look at the implementation of the solver and check if you can extend it to use three fluids.
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Old   March 24, 2014, 17:55
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Jace
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Quote:
Originally Posted by lenzo View Post
Okay thanks.


Yes, I know the tutorial folders...but these tutorials without....a document with explanations like the user manual....it's really hard, even senseless...
Nevermind, the interFoam has the breaking of a dam tutorial explained on the user guide, so I will focus on this one!

Thanks a lot
hey, I think (to the best of my knowledge) that multiphase refers to liquid-gas or multiple liquid scenarios...and since you have mixture of 3 gases, maybe try dieselFoam/sprayFoam and just turn the liquid injection off? Those solvers are capable of solving a system involving multiple gaseous species.

Maybe explain the problem you're trying to simulate in more detail?

Regards,
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