December 3, 2019 at 2:37 pmF123rooqSubscriber
Firstly, I wanted to know is it possible to have Supercritical CO2 in ansys?
Secondly, I wanted to simulate a flow in a body that is rotating with a hole in the middle of it for the fluid to go though. I want it to spray out of the other end like a jet. I want to do this in 2D, not 3D.
I have a box which has a little tube sticking of it, and I pass the fluid through the tube, and I want to go into the box which is representing an open space, so I want it to go into the open space as a jet. But, I also want the tube sticking out, to rotate, but not the other big box, because that is meant to be the room and a room doesn't spin.
At the moment I am using the Transition SST model (should I be using any other?)
At the moment I can simulate a flow in the geometry but steady, and also I cannot rotate one bit of the geometry as I need it to. Can you help me please with a step by step guide, as I am completely new to CFD, and this might be the first and last time I do it, because it is so annoying.
December 3, 2019 at 3:26 pmRobAnsys Employee
I'd suggest starting with the tutorials that come with the documentation. Modelling supercritical CO2 is hard, even for experienced users so start with the basics.
December 3, 2019 at 3:33 pmF123rooqSubscriber
Can you give me a little guide to rotating bodies. Where do I start to read up on. What is needed?
December 3, 2019 at 4:33 pmDrAmineAnsys EmployeeYes you can model supercritical CO2 either as cubic eos or using RIP or using nist refoprop
December 3, 2019 at 4:53 pmRobAnsys Employee
Check the tutorials: there are two (reference frame) that are useful.
December 3, 2019 at 6:08 pmF123rooqSubscriber
Thank you all
December 12, 2019 at 10:54 amF123rooqSubscriber
Can you please walk me through setting up my 2D geometry for supercritical co2. I have a box, with 2 pipes sticking out of it. The two pipes will have ScCO2 coming to the box which has air in it, and mixing.
December 12, 2019 at 10:57 amF123rooqSubscriber
I had typed in a code that I found online into ansys, and it gave me the option to use the NIST, so I selected co2.fld file, then it said that calculations will be performed for the vapour phase. I have selected multiphase, and then Volume of Fluid. I have read someone did a similar study, and they used VOF to simulate the stream of jet that I want too.
December 12, 2019 at 11:02 amF123rooqSubscriber
I have chosen my inlets, my outlets, and walls
December 12, 2019 at 11:13 amF123rooqSubscriber
I have two phases, one is air, and other real gas co2 from the refprop etc. The problem is that my box, and the two pipes have 2 phases in the cell zone conditions. But I only need phase 1 (air) in the box, and phase 1 and 2 in the pipes together, because they open to the atmosphere, so air would already be mixed in the pipes I presume, I don't expect it to be 100% ScCO2 in the pipes. But if having one phase (ScCO2) in the pipes makes the setup easier, then I am happy with that for the time being.
December 12, 2019 at 11:14 amF123rooqSubscriber
And regarding the rotation, its fine, if you can help me set it up stationary, that is amazing.
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
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
- Difference between K-epsilon and K-omega Turbulence Model
- The solver failed with a non-zero exit code of : 2
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- error: Received signal SIGSEGV
© 2023 Copyright ANSYS, Inc. All rights reserved.