Hi all,

Below is my recent residuals plot from case and partial of the simpleFoam log
Just some questions about it that I’m wondering:

Q1. Why the values for k and epsilon are constantly 0?

Q2. Some article suggest that the value of final residual has to be at least below 1e-5 (even if already convergence) to prove test accuracy. In my case below shall I increase the iteration or refine the mesh so that the final number can get smaller?

``````Time = 38

smoothSolver:  Solving for Ux, Initial residual = 0.048253863, Final residual = 0.0036584815, No Iterations 5
smoothSolver:  Solving for Uy, Initial residual = 0.0063971321, Final residual = 0.00050034559, No Iterations 5
smoothSolver:  Solving for Uz, Initial residual = 0.059394915, Final residual = 0.0044532472, No Iterations 5
GAMG:  Solving for p, Initial residual = 0.2786923, Final residual = 0.015619073, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.027729305, Final residual = 0.0014781619, No Iterations 3
GAMG:  Solving for p, Initial residual = 0.0059746813, Final residual = 0.00046473453, No Iterations 2
time step continuity errors : sum local = 1.366917e-005, global = -1.6069634e-006, cumulative = -8.2030719e-006
ExecutionTime = 63.76 s  ClockTime = 64 s

Time = 39

smoothSolver:  Solving for Ux, Initial residual = 0.04829627, Final residual = 0.0037616931, No Iterations 5
smoothSolver:  Solving for Uy, Initial residual = 0.0062745478, Final residual = 0.00048728618, No Iterations 5
smoothSolver:  Solving for Uz, Initial residual = 0.057402083, Final residual = 0.0042921579, No Iterations 5
GAMG:  Solving for p, Initial residual = 0.28499525, Final residual = 0.015835205, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.028172626, Final residual = 0.001409298, No Iterations 3
GAMG:  Solving for p, Initial residual = 0.0056208146, Final residual = 0.00045202413, No Iterations 2
time step continuity errors : sum local = 1.35848e-005, global = -1.5978644e-006, cumulative = -9.8009363e-006
ExecutionTime = 65.011 s  ClockTime = 65 s

Time = 40

smoothSolver:  Solving for Ux, Initial residual = 0.047550885, Final residual = 0.0037065062, No Iterations 5
smoothSolver:  Solving for Uy, Initial residual = 0.006180837, Final residual = 0.0004757727, No Iterations 5
smoothSolver:  Solving for Uz, Initial residual = 0.055704833, Final residual = 0.00413095, No Iterations 5
GAMG:  Solving for p, Initial residual = 0.28691631, Final residual = 0.014863905, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.027312433, Final residual = 0.0013194807, No Iterations 3
GAMG:  Solving for p, Initial residual = 0.0051707332, Final residual = 0.00038601263, No Iterations 2
time step continuity errors : sum local = 1.1689319e-005, global = 6.1117605e-007, cumulative = -9.1897602e-006
ExecutionTime = 66.239 s  ClockTime = 67 s

Time = 41

smoothSolver:  Solving for Ux, Initial residual = 0.046516919, Final residual = 0.003577389, No Iterations 5
smoothSolver:  Solving for Uy, Initial residual = 0.0061126837, Final residual = 0.00046673936, No Iterations 5
smoothSolver:  Solving for Uz, Initial residual = 0.054935017, Final residual = 0.0040185635, No Iterations 5
GAMG:  Solving for p, Initial residual = 0.28022004, Final residual = 0.013729128, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.02595127``````