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-   -   STARCCM+ Model Selection Question (http://www.cfd-online.com/Forums/star-ccm/121113-starccm-model-selection-question.html)

s1300044 July 22, 2013 03:17

STARCCM+ Model Selection Question
 
Hi, All Experts,
I am just starting to use STARCCM+ and have a project would like to simulate the nebulizer model. I just know some conditions:
1. Fluid selection: Air & Water
2. Inlet: Air, 15psi
3. Outlet: Pressure, 1atm

I would like to know the mass fraction of water & Air ,the final water particle size after impact the wall, and the outlet flow rate.

My questions are:
1. What kinds of phycial model is suit for this simulation?
2. Doest STARCCM+ have good tutorials that I can learn from it before starting to do?

Please kindly let me know it.

thanks.
:)

siara817 July 23, 2013 09:19

Hi

As I understood you have two phases ( water and air).
Do you have a volume fraction of each phase in the inlet? or you have air as main phase and water droplets are liquid particles dispersing in the air?
Do you have some experimental data?

s1300044 July 23, 2013 11:24

1 Attachment(s)
Quote:

Originally Posted by siara817 (Post 441491)
Hi

As I understood you have two phases ( water and air).
Do you have a volume fraction of each phase in the inlet? or you have air as main phase and water droplets are liquid particles dispersing in the air?
Do you have some experimental data?

Hi, Siara,
Thanks for your prompt reply to me.

I prepare the attached file about my project. and hope you can see it and teach how to do this project.

currently, the attached file has include all data that I know it.

Please provide some comments for me.

Joyal:D

siara817 July 24, 2013 03:32

I saw the questions.
The first and second question can be answered using VOF. Take a look at the tutorial about VOF which is about an an injector.
But about the third question, I think it is a little tricky. I do know how to solve it exactly. You need two way coupling, in which the particles can attach to each other.

s1300044 July 24, 2013 10:58

Quote:

Originally Posted by siara817 (Post 441626)
I saw the questions.
The first and second question can be answered using VOF. Take a look at the tutorial about VOF which is about an an injector.
But about the third question, I think it is a little tricky. I do know how to solve it exactly. You need two way coupling, in which the particles can attach to each other.

Siara,
Thanks for your reply. I will try to learn from VOF.
Joyal:):)

s1300044 August 10, 2013 05:32

Quote:

Originally Posted by siara817 (Post 441626)
I saw the questions.
The first and second question can be answered using VOF. Take a look at the tutorial about VOF which is about an an injector.
But about the third question, I think it is a little tricky. I do know how to solve it exactly. You need two way coupling, in which the particles can attach to each other.

Siara,
I am facing a new problem about floating point exception issue. Can you help me to check what is my problem? Please let me know.
thanks.

Joyal


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