Flow module
Posted: Wed Mar 22, 2023 6:51 am
To All,
In my simulation, I get the following error message
WARNING, Flow: continuity not converged 3.232E-02 > 1.000E-02 /s
What do I have to change in my simulation so that the "divergence criterion for continuity equation"n is fulfilled?
Thanks in advance
Johann
Attached the selected Flow solver data
# Flow solver
# -----------
# (*) marks default settings for options
# Selection of the Flow-Solver:
# combined|separated|piso [verbosity <lvl>]
# [ steady_[re]start|ana_[re]start [pre_iter <it>]|readfrac <file> ]
combined verbosity 0
# Time stepping in Flow-Solver: fix <tstep[s]>
# or: cfl <CFL-number> [first <tfirst>] [max <tmax[s]>] [min <tmin[s]>]
fix 0.05
# Convergence criterion for impulse eqn. (absolute) [mue_m/s]
# (real) [warn(*)|nowarn]
1.e-4
# Max. number of iterations for linear solver:
# (int) [bicgmr2(*)|bicgsafe|bicgstab]
10
# Convergence criterion for pressure eqn. (absolute) [Pa]
# (real) [warn(*)|nowarn] [adapt(*)|noadapt]
3e-4
# Divergence criterion for continuity equation [1/s]
# (real) [warn(*)|nowarn]
1e-2
# Max. iterations of the flow solver
50
# Factor for underrelaxation of pressure 0.0 < alpha < 1.0
0.9700000000000
In my simulation, I get the following error message
WARNING, Flow: continuity not converged 3.232E-02 > 1.000E-02 /s
What do I have to change in my simulation so that the "divergence criterion for continuity equation"n is fulfilled?
Thanks in advance
Johann
Attached the selected Flow solver data
# Flow solver
# -----------
# (*) marks default settings for options
# Selection of the Flow-Solver:
# combined|separated|piso [verbosity <lvl>]
# [ steady_[re]start|ana_[re]start [pre_iter <it>]|readfrac <file> ]
combined verbosity 0
# Time stepping in Flow-Solver: fix <tstep[s]>
# or: cfl <CFL-number> [first <tfirst>] [max <tmax[s]>] [min <tmin[s]>]
fix 0.05
# Convergence criterion for impulse eqn. (absolute) [mue_m/s]
# (real) [warn(*)|nowarn]
1.e-4
# Max. number of iterations for linear solver:
# (int) [bicgmr2(*)|bicgsafe|bicgstab]
10
# Convergence criterion for pressure eqn. (absolute) [Pa]
# (real) [warn(*)|nowarn] [adapt(*)|noadapt]
3e-4
# Divergence criterion for continuity equation [1/s]
# (real) [warn(*)|nowarn]
1e-2
# Max. iterations of the flow solver
50
# Factor for underrelaxation of pressure 0.0 < alpha < 1.0
0.9700000000000