Convergence to 0.001?

Jack Keays

Hi!

I'm doing an 2D coupled, Unsteady k-e solution on a centrifugal pump. My soloution is converging to about 0.001 scaled residual for continuity. The others go to less than 0.00001. My continuity plot v's iteration is however oscillating as it gets close to convergence. The "amplitude" of the oscillation is growing larger as the time step goes on, but it's lower value moves towards 0.001. Does anyone know why it is that my problem behaves in this manner and also what significance it has on my results. How could I improve my boundary conditions or mesh to help this.

Regards,

Jack.