[MsharyR]

Hi everyone,

I have been working on modeling a two-phase tank, but I have encountered a problem in volume fractions of the fluids. First I wanted to define them as constant (0.2 and 0.8 for example), then I tried to define them as a function of the fluid height like what people in the tutorials do.


In both cases I got almost the same results the volume fractions of the fluids doesn't match what I define!

I'm sorry I'm new to CFD and CFX, I know I haven't explained it right, so I attached the file in this post.

here is the Ansys file

https://gofile.io/?c=Tpqfng

My goal is to define the volume fraction as a constant value of the total volume for example 92% or 99%.

[ghorrocks]

The workbench project file has no useful information in it. Also, please do not use 3rd party download sites - I don't trust them.

Please attach your output file to the forum. Instructions of how to do this are here: https://www.cfd-online.com/Wiki/Ansy...n_the_forum.3F

[MsharyR]

Originally Posted by ghorrocks

The workbench project file has no useful information in it. Also, please do not use 3rd party download sites - I don't trust them.

Please attach your output file to the forum. Instructions of how to do this are here: https://www.cfd-online.com/Wiki/Ansy...n_the_forum.3F

Thank you for the response ghorrocks. I'm sorry for that I did try uploading it in the attachment, but didn't work. Next time I will avoid using 3rd party sites.

I'm sorry what do you mean by output file is it the results file? and how I can save, because I tried and couldn't figure out how to do it.

Again thanks for the help, I'm new to this software so excuse my little knowledge

[Gert-Jan]

Something is really wrong, since I don't see any residuals for the massfraction. Also in the postprocessing, the volume fraction is constant?

I don't know what you did, but it is impossible to tell from this info. I would opt for a decent tutorial and start from there.

What about the info in the help, paragraph 7.18.5.4. Initial Conditions

[MsharyR]

Originally Posted by Gert-Jan

Something is really wrong, since I don't see any residuals for the massfraction. Also in the postprocessing, the volume fraction is constant?

I don't know what you did, but it is impossible to tell from this info. I would opt for a decent tutorial and start from there.

What about the info in the help, paragraph 7.18.5.4. Initial Conditions

I totally agree with you there is something wrong, I couldn't figure it out. Is there any way that I can upload the CFX file here so that you can help me?

Actually while doing my case I followed a tutorial on YouTube, unfortunately it seems that I made something wrong.

Thanks for the feedback.

[ghorrocks]

The text file which displays on the right side of the solver manager is the output file. It is a text file (extension .out) in the CFX run directory. Upload that file to the forum and it will have the information we need.