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December 18, 2019, 04:12 |
Pressure iteration did not converge in ITMAX
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#1 |
New Member
Sumit Adhikari
Join Date: Dec 2019
Posts: 1
Rep Power: 0 |
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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February 3, 2020, 21:04 |
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#2 |
New Member
Join Date: Dec 2017
Posts: 20
Rep Power: 8 |
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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Tags |
convergence, convergence criteria, pressure iteration, time steps, very high simulation time |
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