[marcusaurelius]

I am trying to simulate subcooled flow boiling in horizontal channel with Non-equilibrium RPI wall boiling model. It is transient simulation with Implicit scheme. Steady state simulation are not giving the true results so that scenario is already discarded. I have already performed grid independency and now trying to do time step converging/independence for transient simulation. Started with time step of 5E-02 and reduced upto 1E-05. But, the results keep changing every time. The results have shown to match when time step is around 5E-03. With smaller time step, The results keep changing significantly.

y+ is around 30. I am using ANSYS Fluent

So, please help me how time step independence can be achieved?

The models and schemes are listed in picture attached.