October 9, 2018 at 4:09 amRaj1996Subscriber
Hello. So ive made a 90 degree pipe. How do i make the flow to be in a horizontal way?
October 9, 2018 at 4:17 amKeyur KanadeAnsys Employee
Can you please provide more details. Please insert some images.
October 9, 2018 at 4:24 am
October 9, 2018 at 4:34 amKeyur KanadeAnsys Employee
Please use gravity in X direction.
You can also check following.
October 9, 2018 at 8:39 amRobAnsys Employee
You also need alot more mesh to use the VOF model in this way: see my comment in your other thread https://forum.ansys.com/forums/topic/emulsion-simulation-in-a-pipe/
October 9, 2018 at 2:12 pmRaj1996Subscriber
Hello friends. Thank you so much for knowledge and instructions shared. However there are still some sections that i am in doubt. My goal is to observe the emulsion flow throughout the pipe. Below are certain things that i am not sure of.
1) The fluid at the inlet that i need to use is mixture of oil at various water cuts. Such as oil with 10%, 20%, 30% water. In this case, is my inlet phase to be set as mixture or oil at the boundary conditions tab? What i have previously tried to do was that i set the inlet phase to be mixture and to set the volume fraction for the water as the amount i require such as 0.1, 0.2, 0.3. The outlet phase was set at mixture and type set to pressure-based. Is this the right way?
2) Do i need to create regions if my inlet flow is going to be a mixture of oil and gas?
3) The surface tension coefficient value that i am applying is currently 0.075 n/m based on youtube tutorials. Is there a specific value to be used for oil and water surface tension?
My solution method is currently Scheme: Coupling, Gradient: Least squared, Pressure: Presto, Volume fraction: Compressive and the others set at second order.
Your help is very much appreciated and i would also like to thank you guys once again.
October 9, 2018 at 3:44 pmRobAnsys Employee
As ANSYS staff we can't answer too specifically on a public forum: the wider community can.
Re surface tension, read up on the subject: different materials have different surface tension values. You also need to work out what sort of oil you're using as "oil" covers anything from olive oil to Saudi Heavy bitumen!
Have you read up on the VOF and Eulerian multiphase models in the documentation? You'll need R19 for this, but the sections on Multiphase will answer most of your questions re the boundary conditions.
- You must be logged in to reply to this topic.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- Suppress Fluent to open with GUI while performing in journal file
- Floating point exception in Fluent
- What are the differences between CFX and Fluent?
- Heat transfer coefficient
- Getting graph and tabular data from result in workbench mechanical
- The solver failed with a non-zero exit code of : 2
- Difference between K-epsilon and K-omega Turbulence Model
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- error in cfd post
© 2023 Copyright ANSYS, Inc. All rights reserved.