The wlfxxxx files in Modelsim simulation directory

I believe those files generated when you open a new project .mpf and for each time you run a simulation, it will create a new wlfxxxx file. I think these files are dataset (I could be wrong) and if you do not need it, you can just delete it.

I do not see these files generated when running using Nativelink flow or scripted flow which I usually do. Perhaps you can consider that flow.

Or the community here whom come across this may has a better solution for you.

You may checkout the User Guide below on how to simulate your design.
Quartus Standard (nativelink)
Quartus Pro (scripted flow)

Best Regards,
Richard Tan

p/s: If any answer from the community or Intel support are helpful, please feel free to give Kudos.