Dear Mr. Prashanth,
Thank you so much for your kind reply.
Yes, it diverged with fewer irritations when I set default g, so I gradually decreased the magnitude of |g| until e-20 (I also tried to set g as zero), the only difference is that the case would have more iterations before the divergence.
After posting this, I tried only doing a single change in the tutorial case VMFL-067-FLUENT-1. As I changed the density of liquid water or the specific heat of vapor water, the tutorial case just diverged. So I also would like to know if the CHF wall boiling mode is sensitive to the material properties, and the applicability to the low operating pressure. Thank you so much.
Look forward to your reply.