Learning Forum

[Manish Patel]

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 for transient simulation. Started with time step of 5E-02 and reduced upto 1E-05. But, the results keep changing everytime. The results have shown to match when time step is arounf 5E-02. With smaller time step, I am not even seeing boiling starting.

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

The models and schemes are listed below. 

[Prashanth]

Hello, what is the y-plus values near the walls of interest when you change the timesteps? Also, which Fluent release are you using?

[Manish Patel]

 

The y+ valus is 30. I am using Ansys 2021 R1. 

 

[Manish Patel]

Can I get some input to solve the problem i am facing?