June 17, 2020 at 4:12 amWeiqiang LiuSubscriber
I am modeling fuel combustion in porous zone with fluent. The temperature is different between porous solid and fluid locally. In other words, the solid and fluid are in non thermal equilibrium state. However, I don't want to use the in-build non thermal equilibrium model of fluent. Instead I want to use dual energy equations to solve fluid and solid temperature separately.
The general idea is to use a UDS to solve solid temperature in which I can define source term, diffusion coefficient and so on. The energy equation of fluid is solved by fluent automatically. However, I have two confusions before I can start my modeling work.
Firstly, although I use a UDS to solve solid energy equation, fluid still solves energy equation of fluid assuming thermal equilibrium state. In other words, the conduction term, unsteady term of fluid equation still solves in a volume averaged method. I mean should I modify the energy equation of fluid energy equation to make it non-volume averaged?
secondly, I have chemical reactions in fluid domain. Then how to deal with source terms caused by chemical reactions to fluid and solid. My thinking is to assume combustion source term is only added to fluid energy equation by default. And then, fluid and solid exchange heat by user defined source term?
June 18, 2020 at 8:51 amWeiqiang LiuSubscriber
I think I have to modify thermal conduction coefficient of fluid. Because I compared the energy equation of thermal equilibrium and non thermal equilibrium in fluent theory manual. I found it's different regarding to fluid thermal conductivity.
- 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.