July 30, 2018 at 3:00 pmM.AbdelhadySubscriber
I would like to read a spatial-temporal velocity profile in Fluent, so that the simulation reads new non-uniform velocity profile at each time-step. From Fluent’s user manual, profiles can do that either uniform velocity profile at different time-steps, or the same non-uniform profile for all time-steps. Could someone please let me know if there is a way to have non-uniform profile added at each time-step? And the method to do that?
July 31, 2018 at 10:34 amRobAnsys Employee
There isn't a profile option to change velocity with location and time. One option would be to use a case modification to read the new table, but that's going to be very slow. Changing the boundary every time step is also likely to be fairly unstable.
Please can you provide some images/description of what you're trying to model?
July 31, 2018 at 12:24 pmM.AbdelhadySubscriber
Thank you for your reply, I'm trying to feed my simulation with free-stream turbulence data (instantaneous non-uniform velocity). So the concept is to use library of data, that has planes of velocities to be fed at each time step. The method is technically named Precursor Prepared library, and is outlined in "Inlet conditions for large eddy simulation: A review" by G. R. Tabor and M. H. Baba-Ahmadi in P.558 (https://doi.org/10.1016/j.compfluid.2009.10.007). A schematic is shown below
Dhamankar et al. (2015) DOI: 10.2514/6.2015-3213
August 1, 2018 at 4:06 pmRobAnsys Employee
I think you're either going to need to read in a new profile every some timesteps or use a UDF to cycle through the equivalent data sets. Unfortunately, the exact how of what to do is beyond what I can answer on a public forum as ANSYS staff: hopefully someone in the wider community can assist as needed.
August 1, 2018 at 4:09 pmM.AbdelhadySubscriber
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.