[Fat shady]

Hello, everyone!
I am currently doing a multiphase flow simulation on a turboexpander(The main purpose is to analyze the droplet nucleation of water vapor in the process of turbine expansion).

Setting:
I imported the grid and created a Fluid domain.The working medium is air and water vapor.The air is set to a continuous fluid,Water vapor is set as a droplet (phase change).
Problem:
I did not find Eulerian-Eulerian Models in the Model Type of Fluid Models,just the free surface model.No matter how I set it, I can't find the Eulerian-Eulerian model option.How can I solve it?

I don't know if my approach is wrong, but I am also trying to learn multiphase flow and want to successfully simulate it.If you know about this, please help me, thank you very much!

[ghorrocks]

Droplet nucleation in the expansion of a turbine is going to be a very complex physical process, and is going to be challenging to model for an experienced CFD operator. It appears you are new to multiphase models - are you sure this is an appropriate model for you to be attempting?

This is highly likely to be a non-equilibrium phase change model. Have a look in the documentation for the theory of non-equilibrium phase change and an example. This is one of the more complex multiphase models.

[Fat shady]

Originally Posted by ghorrocks

Droplet nucleation in the expansion of a turbine is going to be a very complex physical process, and is going to be challenging to model for an experienced CFD operator. It appears you are new to multiphase models - are you sure this is an appropriate model for you to be attempting?

This is highly likely to be a non-equilibrium phase change model. Have a look in the documentation for the theory of non-equilibrium phase change and an example. This is one of the more complex multiphase models.

Dear ghorrocks,
Thank you very much for your reply.As you say I'm new to multiphase flow,but I need to try this model to finish my project. Later I will learn more about the theory of non-quilibrium phase change and droplet nucleation.Thank you for your advice!

[Opaque]

Originally Posted by Fat shady

Dear ghorrocks,
Thank you very much for your reply.As you say I'm new to multiphase flow,but I need to try this model to finish my project. Later I will learn more about the theory of non-quilibrium phase change and droplet nucleation.Thank you for your advice!

Please try the multiphase tutorials, and you will see how to set up the basics of a multiphase case. There is a specific tutorial for your requirements:

Tutorial: Axial Turbine Equilibrium and Non-Equilibrium Steam Predictions

[Fat shady]

Originally Posted by Opaque

Please try the multiphase tutorials, and you will see how to set up the basics of a multiphase case. There is a specific tutorial for your requirements:

Tutorial: Axial Turbine Equilibrium and Non-Equilibrium Steam Predictions

Dear Opaque,
Hello Opaque,Thank you for your advice. About "Tutorial: Axial Turbine Equilibrium and Non-Equilibrium Steam Predictions". I would like to ask, is this tutorial downloaded from the ANSYS customer portal?
If so, I may not be able to download it for many reasons.（I can't get it to log in）Could you please download it and send it to my email? Thank you very much.
My email is: 1604214468@qq.com
Either way,Thanks,Opaque!

[ghorrocks]

It is available on the ANSYS Customer Portal. I suspect it is not available on the Student portal as it is very advanced stuff, not the sort of stuff students should be looking at (but I might be wrong, I have not checked there).

Those documents are ANSYS property and we are not at liberty to send them to you. If you do not have access to them you will need to talk to your ANSYS support person to get access.

[Fat shady]

Originally Posted by ghorrocks

It is available on the ANSYS Customer Portal. I suspect it is not available on the Student portal as it is very advanced stuff, not the sort of stuff students should be looking at (but I might be wrong, I have not checked there).

Those documents are ANSYS property and we are not at liberty to send them to you. If you do not have access to them you will need to talk to your ANSYS support person to get access.

That's all right.Thanks!