[JX-]

dear all,

i have tried to solve my model for the first 100 iterations using the first order upwind turbulence model. (k-epsilon with reliazable and non-eq wall function)

the solver used was a coupled solver.

throughout the first 50 iterations, the graph seems fine. however the Cd values were unrealistic. it started at like 1.xx till like 5.xx and then it went hairwire.

i wonder what went wrong? could it be my mesh?

any ideas or opinions are highly appreciated.

thanks,
Jx