October 11, 2023 at 6:22 amManish PatelSubscriber
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?
October 13, 2023 at 10:20 amPrashanthAnsys Employee
Hello, what is the y-plus values near the walls of interest when you change the timesteps? Also, which Fluent release are you using?
October 17, 2023 at 7:39 amManish PatelSubscriber
The y+ valus is 30. I am using Ansys 2021 R1.
October 23, 2023 at 11:08 amManish PatelSubscriber
Can I get some input to solve the problem i am facing?
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