Time step not converging in Transient simulation with RPI Wall boiling
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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.
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