September 18, 2023 at 6:26 amhone zifuSubscriber
Currently, water falls from the entrance to the rotating surface and the flow of water is observed. The model is divided into two areas, the upper layer is 1.96mm thick and the lower layer is 0.04mm thick fluid area.
The first picture shows the ratio of water to air in the bottom layer. Currently, there is only air.
The second picture shows the interface between two fluid regions.
Does it have anything to do with the mesh being too fine?
September 20, 2023 at 5:46 pmPrashanthAnsys Employee
Hello, the mechanism you are trying to model is not clear. Can you elaborate, a schematic maybe?
September 20, 2023 at 6:18 pmhone zifuSubscriber
The overall model is as shown below. Because it is not a simple plane, I cannot use sweeping in the mesh analysis, so I divided the model into two parts, the upper thickness is 3mm and the lower thickness is 0.04mm. Use sharing to merge the two models together.
The mesh analysis uses a sweeping method to increase the thickness of the upper and lower blocks, but in the subsequent fluent flow, the liquid flows downward from the upper inlet and stops at the junction of the two models.
September 20, 2023 at 6:22 pm
September 21, 2023 at 9:22 amPrashanthAnsys Employee
Looking at the mesh, the cell size jump is massive between the two zones and the aspect ratio looks to be very high. You can work on getting a well resolved mesh with similar sizes.
September 21, 2023 at 2:10 pmhone zifuSubscriber
So my liquid cannot flow down from the green part to the gray part because of the grid, because the fluent grid is at 0.4
September 21, 2023 at 6:07 pmhone zifuSubscriber
Will such a mesh prevent the liquid from flowing?
September 22, 2023 at 4:58 pmPrashanthAnsys Employee
Yes, massive cell jumps won't be helping with tracking the VOF interface. Will recommend adding biasing and keeping the mesh resolution consistent.
September 26, 2023 at 7:59 am
- 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.
- Floating point exception in Fluent
- What are the differences between CFX and Fluent?
- Heat transfer coefficient
- Difference between K-epsilon and K-omega Turbulence Model
- Getting graph and tabular data from result in workbench mechanical
- The solver failed with a non-zero exit code of : 2
- Suppress Fluent to open with GUI while performing in journal file
- Mesh Interfaces in ANSYS FLUENT
- Time Step Size and Courant Number
- error: Received signal SIGSEGV
© 2023 Copyright ANSYS, Inc. All rights reserved.