June 24, 2019 at 3:13 pmrchristensenSubscriber
I am trying to model melting of a phase change material (PCM) which is embedded with finned tubes. One unit cell of the entire geometry looks as follows. The highlighted part is the finned tube (SS 316) and the surrounding six blocks are the PCM. The innermost circle represents the heat transfer fluid that deposits the heat into the PCM for melting. The gravity acts axially (into the screen), therefore the flow is also symmetric.
As my geometry is symmetric, I decided to divide it into six parts and just use 1/6th of the model for speeding up the simulations (see below). The flow rate through 1/6th of the circle now is 1/6th of the original value. My concern is with the boundary conditions on the edges now.
Would a symmetric boundary condition be the appropriate choice for the highlighted faces (including the other side), along with a zero heat flux? Or do I need to have any additional boundary conditions.
I would appreciate your inputs and advice.
June 25, 2019 at 4:40 amDrAmineAnsys EmployeeSymmetry is fair enough if no swirl. If swirl I will go for periodic boundary.
In your case no flow is crossing the edge? If yes then I would apply symmetry.
Neverthless even if the configuration is symmetric, flow can be asymmetric.
June 25, 2019 at 2:26 pmrchristensenSubscriber
Thank you, Amine.
In my case, no flow is crossing the edge. Also, the flow within the tube is fully developed laminar. So I think I will stick with a symmetric boundary condition, and see whether the results I get make sense.
- 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
- 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.