Convergence Problem
 

Hello,


I am trying to simulate fluid flow inside a wavy channel. I created a 2D model and applied periodic boundary condition for the inlet and outlet.



for water flow with Re = 500 I am using the laminar viscous model but the energy is not converging, however when I use for the same model velocity which corresponds to Re = 5000 the energy converges.



is there anyone who can help me to understand what is the problem ?