******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* To those whom this may concern, I have been trying to simulate the constricted channel case posted in the appendix of the Nektar team’s paper (https://www-sciencedirect-com.pitt.idm.oclc.org/science/article/pii/S0010465...), specifically section 4.2. Using the configuration files provided as is, I am not able to simulate the case past the 2nd output (don’t remember what physical time this is). The specific error was “Nan was detected”. On further investigation into the configuration file, I also noticed that while the configuration file specifies the fluid is driven by a body force, but it lacks the <FORCING> stuff specified in the documentation. I don’t think this is the root cause of the blowup, but may have contributed? My main concern is that I am not able to get a stable simulation in the Re=2800 case, and I’m trying to move up to Re=5600. Is there some pointers you guys could give me to help me run a stable, turbulent, constricted periodic channel? Thanks, Dustin -- Dustin (Ting-Hsuan) Ma Graduate Researcher Department of Mechanical and Materials Science University of Pittsburgh Tim48@pitt.edu<mailto:Tim48@pitt.edu>