July 19, 2019 at 7:52 amPeterBeshaySubscriber
I wish anyone can help me in this issue, I am simulating oil-water flow in a pipelines, mainly stratified wavy, i tried dynamic mesh adaption at the interface, however, the mesh does not update every time step. can anyone tell me how to fix?
July 19, 2019 at 8:47 amRobAnsys Employee
It may not update every step as the free surface shouldn't change that much between the steps: is it updating at all?
July 19, 2019 at 8:50 amPeterBeshaySubscriber
Thank you so much for your response, Sir.
Actually now it is updating every time step, but after the interface leaves the refined region, the mesh stays refined, it does not coarsen to the original size.
In other words, the refined region is not following the water-oil interface.
July 23, 2019 at 1:25 pmDrAmineAnsys Employee
Are you using dynamic mesh adaption? Can you post screenshot of the panel?
July 24, 2019 at 10:16 amPeterBeshaySubscriber
Dear Mr Amine,
Thank you so much for your response.
After setting the models, boundary conditions and everything, i initialize the case, then patch oil on top of water in the pipeline. then i adapt as shown in the attached photo
But after few time steps i stop the solution, i see the refined mesh does not get coarse again after the interface leaves this area.
Please help me in this issue. Thank you
July 24, 2019 at 10:17 amPeterBeshaySubscriber
also after solving this issue, i will be running cases on HPC, i'll submit jobs and run on parallel processes. any other considerations should be taken for dynamic mesh adaption? cause i read something about an executable command
July 25, 2019 at 10:57 amRobAnsys Employee
Go into the Adapt manage options and increase the number of levels of refinement: the default is two to prevent accidental creation of massive cell counts. However, when you run the dynamic tool it'll sometimes adapt twice and then can't select the same cells to coarsen.
July 25, 2019 at 10:58 amRobAnsys Employee
Run the model (or a small test) locally to check all settings before using the cluster.
July 27, 2019 at 7:16 amPeterBeshaySubscriber
Dear Mr rwoolhou, Mr Amine,
Thank you so much for your responses.
I did manage to solve the issue, Its all about adjusting the coarsening and refining thresholds.
Thank you so much
- 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.