October 29, 2020 at 3:08 pmDjoumessiSubscriberHi everyone.nI'm working on an FSI model where I couple the CFX-Transient structural while using a system coupling. but after 200 iterations, I get this error:n (DP 0) Participant Solution encountered a fatal error. Message: Stopped in routine SYNP_CHKCONV_SC Please do not save the project if you would like to recover to the last saved state.nbut what surprises me is that the model converges very well to the iteration before the 200 iterations. i tried everything I get the same error.nIs it because I'm using the student version? nPlease can someone help me? I've been looking for this error a lot on the net but without success. Thank you in advance. nn
November 2, 2020 at 3:23 pmStephen OrlandoAnsys EmployeeHi,nWhen running System Coupling and it stops running, the first thing to do is examine the output files for each solver to look for clues to what happened. For CFX, look at the .out file. For Mechanical, look at the .out file. Also, look at the System Coupling log file, .scl. We have seen this SYNP_CHKCONV_SC message come up before when the mapping isn't very good. So check the mapping summary in the .scl, then check the geometry to see if changes need to be made. nIt is very important to build up the FSI simulation in stages as opposed to setting up the 2-way FSI right at the start. This document Best Practices for Coupled Fluid-Structure Interaction (FSI) describes this process and is available here:https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/sysc_ug/sysc_bestpractices_fsi.htmlnI recommend going over this tutorial in the Ansys documentation that shows a 2-way FSI simulation with CFX and Mechanical.https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/sysc_tut/sysc_tut_oscplate_wb_cfx.htmlnYou can also look at the following for the same tutorial but run with the System Coupling GUI or Command Line Interface that is run outside of Workbench:https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/sysc_tut/sysc_tut_oscplate_cli_cfx.htmlnFSI simulations with very soft materials or membranes are prone to numerical instabilities. In 2020R1 we have introduced a stabilization method in System Coupling called the Quasi-Newton Stabilization Algorithm. Note that this has to be used with the new System Coupling GUI or Command Line Interface that is run outside of Workbench. More information here:https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/sysc_ug/sysc_gen_scservice_dt_supplemental_iqnils.htmlnSteven
November 3, 2020 at 7:30 amDjoumessiSubscriberHello Steve,nthank you very much for your intervention, I will work on it and let you know the results.nthanks againnDjoumessi.n
- You must be logged in to reply to this topic.
Simulation World 2022
Check out more than 70 different sessions now available on demand. Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Take a leap of certainty and check out a session today here.
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.
- Changing of font size
- System Coupling
- ansys with matlab
- ANSYS Workbench Mechanical Solver problem after saving
- Error message “Solver pivot warning” due to element birth and death
- 3D ROM in workbench
- ANSYS Direct Optimization
- HARDWARE COMPATIBILITY
- System Coupling
- When I open the Electronic Desktop, Twin Builder auto opens
© 2022 Copyright ANSYS, Inc. All rights reserved.