June 9, 2022 at 7:04 amvsjay3Subscriber
In Ansys Fluent, I am modelling a pipe (with water flowing inside) passing though a soil block. As boundary conditions, I assigned top wall surface of soil block a fixed temperature of 70C and bottom wall a fixed temperature of 32.2C. However, when I ran the simulation for 800 iterations, I found something interesting. The residuals (especially the energy residual) started fluctuating. The temperature results seem to make sense though. So should I not worry about the residual fluctuation? Also why do you think it is fluctuating?
Your kind advice would be highly appreciated!
Thank you very much!
June 9, 2022 at 9:55 amDrAmineAnsys EmployeeYes I will worry about the residual flucations as juding convergence will require not only monitoring key variables but aslo assissing numerical convergence in terms of residual and imbalances.
Which model settings are you using?
What about mesh quality?
What about mesh resolution?
June 9, 2022 at 1:11 pmRobAnsys EmployeeWhat are the flow boundaries?
- 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.