March 28, 2023 at 10:14 amInaam HussainSubscriber
Dear Ansys Users,
I am trying to simulate transonic flow around a circle and square( at 0 and 45 degrees angle of attack); it seems to be converging fine at the CFD scaled residuals and it's working fine at mach 0.4. But when you go faster at mach 0.6 and beyond, the screen shows this:
I don't see what's wrong with the flow CFD residuals console, but I saw that the highest mach number visualization is about a thousand, so how do I correct this predicament? And control Ansys fluent so it gives the right computed values and correct visualization?
All the best,
March 28, 2023 at 10:56 amInaam HussainSubscriber
Here is the visualization of the interrupted flow's mach number at 0.6, and the CFD residuals for the square as well as the meshing, along with the circle meshing as well :
So I was wondering whether any of the ansys employees can help me simulate transonic flow around a circle and square ( in straight up 0 degrees angle of attack and double wedge form at 45 degrees angle attack.
All the best,
March 28, 2023 at 1:52 pmRobAnsys Employee
It's likely a problem with the mesh - ortho quality under 0.1 ish is poor, below 0.01 is awful. Depending on where those cells are you may find as the speed increases the solver numerics can no longer counter the mesh.
Looking at the decompostion in the images check how you've set the sizing around the object of interest. You also need to read up on blockage factor for experimental work: the object is large compared to the duct. If you want to model the object in "open" space you may have a problem.
- 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
- Difference between K-epsilon and K-omega Turbulence Model
- The solver failed with a non-zero exit code of : 2
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- error: Received signal SIGSEGV
© 2023 Copyright ANSYS, Inc. All rights reserved.