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Flow 3D Cast simulation Error: Fluid volume error exceeds 5% |
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August 1, 2017, 13:03 |
Flow 3D Cast simulation Error: Fluid volume error exceeds 5%
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#1 |
New Member
Santosh Reddy
Join Date: Feb 2017
Posts: 4
Rep Power: 9 |
In many of my simulations in Flow 3D Cast, I am observing following error and mentor tip but I have no idea how to implement the suggested changes. Any kind of help to solve this issue is appreciated.
convective flux exceeded stability limit at t= 5.0192E-03 cycle= 26 iter= 17 delt= 2.7720E-04 mesh block 1 restarting cycle with smaller time step 3.02227E-02 163 2.32E-04 2.32E-04/cz 6 4.57E-01 5.9800E-06 +1.83E-01 0.02 0.0000E+00 0.00 00:00:07 94 11:57:45 00:08:04 6.04859E-02 277 3.29E-04 3.29E-04/cz 4 5.67E-01 1.1609E-05 +2.11E+00 0.03 0.0000E+00 0.00 00:00:10 87 11:57:48 00:06:08 9.05542E-02 368 3.53E-04 3.53E-04/cz 9 7.92E-01 1.6953E-05 +4.40E+00 0.04 0.0000E+00 0.00 00:00:13 90 11:57:51 00:05:33 ============= mentor tip =============== fluid volume error exceeds 5%. 1. tighten convergence epsadj. 2. reduce time-step size tdtmax. 3. reduce rcsql compressibility. 4. is there excessive fluid break up? ======================================== TIA |
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November 30, 2018, 03:41 |
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#2 |
New Member
Alex
Join Date: Dec 2017
Posts: 13
Rep Power: 8 |
The same problem-_-||
Have you solved it yet? |
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December 13, 2018, 12:58 |
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#3 |
Senior Member
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Well, try doing what the mentor tip recommends. You can change the epsadj parameter in the numerics tab under the convergence controls for pressure solver options. epsadj corresponds to the multiplier for dynamically adjusted convergence criterion.
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convective flux, flow 3d cast, volume error |
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