December 5, 2019 at 7:53 amnerrorSubscriber
I try to solve a problem for a university class where I have a parameter study of a rocket nozzle. The idea is to change choke- and nozzle outlet diameter and compare the change in velocity at the outlet. I created a 2D nozzle in SpaceClaim with 2 parameters to change the nozzle. The computation works fine and the results seem reasonable for the standard geometry. The solution is found with the Fluent solver and a 2D axisymmetric approach.
Now, whenever I create a new design point and change the nozzle diameter, the update of the solution fails. The error message is not helpful either as it only says "Update Solution Failed".
When I set the newly created design point as "current", the geometry creation and meshing worked but the solution failed, saying "User Input required". Opening Fluent, the "Fluent launcher (Setting Edit only)" opens. However, when fluent is open, I can compute the solution straight away without making any other adjustments to the settings, only clicking on "ok" to initialize the problem. The solver runs fine and the result looks good.
I am really confused about what the problem here is and what I need to do to make the computation run automatically as I don't do anything other than to click on "compute".
(Also note that after I manually clicked on compute for the new design point, all other design points in the parameter overview in workbench have the yellow lightning indicating that there was a change in the setting but I really can't figure out what it might be.)
I included the project files here.
December 5, 2019 at 4:54 pmRobAnsys Employee
Check the solver: is it set for 2d-axi when you open it? Also check the model is on the z=0 plane and that y>=0 (y=0 is hard coded as the axis).
Staff are not permitted to open/download attachments so I'll need images.
December 7, 2019 at 7:50 amnerrorSubscriber
I didn't understand what exactly happend but after setting up the entire fluent solver again, the problem fixed itself and the parametric study runs without issue.
Thank you for your reply, though!
- 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: Received signal SIGSEGV
© 2023 Copyright ANSYS, Inc. All rights reserved.