I am trying to run one transient simulation but it diverge many times.
I am following the simulation from below ID
he use subsonic simulation I am using transient.
Hi @vonek35891,
Thanks for posting your question!
The main problem is that for the incompressible approach the mesh is not well deployed.
just one example: aspectRatio.
Acceptable range: 0 to 100
min: 0.99
max: 152.09
Furthermore you’re having another issues regarding volumeRatio, skewness, etc. Hence we did this incompressible simulation using symmetry strategy, increasing the mesh quality and decreasing the computational cost. Please take a look at the tutorial down below, also feel free to make a copy and improve on your own 
best,