June 6, 2023 at 1:52 pmMoritz ImhoffSubscriber
I'm very new to Ansys Fluent, so hopefully you can understand my problem anyway.
Ansys Fluent 2023 R1
I'm trying to model a simple heat transfer/heat exchanger problem (first static, later transient with patched temperatures).
I defined two fluids fluid1 and fluid2 with an inlet and outlet. It appears that the fluids are coupled via global pressure settings. I can not achieve reasonable flow conditions or the simulation results in the shown error. -reverse flow in all outflow faces and floating point exception
I do not mind the pressure settings, as this is not important for heat transfer results. Later, I want to patch inlet conditions in each time step via a journal. This solution worked quite well with a previous case, but only one fluid and fluid region.
Is there a solution to this problem?
June 6, 2023 at 1:58 pmRobAnsys Employee
Switch "outflow" for "pressure outlet" for a start. Then write 100 times, "I will not use outflow boundary conditions again".
The more general issue is that Fluent currently only has one operating pressure value. Assuming only one side is compressible, use the operating condition there and then adjust the result on the liquid side.
- 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.