Error in a simple simulation

I have built a model for a single-phase flow of a liquid in a circular pipe. I think the mesh quality is OK, but every time I run it, it shows errors.
“DT < DT_MIN. Recovery not possible!”
Has anyone encountered similar problems? (39.4 MB)

Hi @Guangrui_Zhang
This is a very common type of error with MFiX. There are several reasons it could be happening.
Please see 13. Frequently Asked Questions — MFiX 24.1 documentation
If none of those suggestions help, please follow up here.

– Charles