Learning Forum

[jdch232]

Hello,

I've been trying to model a turbulent boundary layer in transient over a 2cm flat plate, and I've been having trouble running it overnight and autosaving the data. I'm fairly new to Fluent and I'm using Ansys 2025 R1 student version.

I have everything modeled and set up, but due to the small timestep, it will take very long (in real-time) to run the simulation. Through calculation activities I have it set to autosave every X time steps (shown below). I've used this to model shorter transient flows before. But for this longer simulation, I would like to run it overnight. I tried doing this previously but it stopped and the project became locked. I'm assuming this was due my computer going to sleep and/or locking?

Is there a way to have it continue running and saving without just keeping my computer awake? As well as saving the overall workbench file? I think I just don't yet have a good understanding of the autosaving/output process.

[Rob]

I'd run Fluent outside of Workbench, about the only reason to use WB now is for lower level parametric studies. That might help with the autosave, and I'd suggest saving the case file each time too while you're learning. 

If your computer is going to sleep it'll stop the Fluent process: have a look in power saving or whatever it's called now. It's one of the options we have turned off on most/all engineer "owned" hardware in Ansys. 

[jdch232]

Thank you, that's helpful. How would you recommend to run Fluent? I've always used Workbench.

Yes I've seen other people recommend saving the case file each time as well. I don't understand this yet, however. I'm not sure how the .cas and .dat files go together yet.

For now I'm running it again and I just set my computer to never go to sleep so that it will keep running. There's probably a better method though.