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Pressure iteration did not converge in ITMAX

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Old   December 18, 2019, 04:12
Default Pressure iteration did not converge in ITMAX
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Sumit Adhikari
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Hello
i am using flow 3D for simulating sediment transport in hydro power head-works.
I am using multiple mesh block and their aspect ratio, inter block mesh size and boundary condition linked is very fine but I am still getting the error massage "pressure iteration did not converge". Now the problem is, for convergence criteria it requires very small time steps ( around 10^-4 sec), which abnormally increases my computational time so my questions are:
how can I increase the convergence criteria, so that the convergence criteria would meet in larger time steps no matter whatever it would cost in my accuracy of result.

note: i am using implicit SOR pressure solver
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Old   February 3, 2020, 21:04
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Increase epsadj to 10 or 100

you can find it in Model setup/Numerics/Pressure solver options/convergence control/ multiplier for dynamically...
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convergence, convergence criteria, pressure iteration, time steps, very high simulation time

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