Learning Forum

[S.Shrestha-4]

Hi, I am trying to simulate a two phase flow boiling of r134-a in 2d rectangular mesh. My calculation settings for transient are below. I keep seeing that the continuity residuals are not reaching the set convergence criteria of 1e-03. A mass imbalance as below is given:                        

                  Mass Flow Rate               [kg/s]
-------------------------------- --------------------
                           inlet              0.17317
                          outlet          -0.24588628
                ---------------- --------------------
                             Net         -0.072716281

 

Is the solution still correct and can I go ahead with running the calculation. How to know if the convergence is correct? 

 

[Rob]

You need to have a very careful look at the flow, flux balance and mesh. You may need to refine the mesh where you're seeing the steep phase gradients and reduce the time step.