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turbulent viscosity limited to viscosity ratio of x.000000e+05 |
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August 31, 2023, 20:18 |
turbulent viscosity limited to viscosity ratio of x.000000e+05
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#1 |
New Member
Anh Dinh Le
Join Date: Apr 2020
Posts: 24
Rep Power: 6 |
Hi experts,
Hi experts, I am simulating an airflow through an object as in the picture. The simulation conditions are Re = 4.3e+5, Uin = 7m/s, Pout = 1atm. The boundary condition for turbulent quantities is turbulent intensity = 0.3 (based on Re) and turbulent length scale l =0.2 (based on the size of the object). The simulation with the central object is okay with very good agreement with reference data. And the turbulent viscous ratio reached up to 3e+04. However, in the simulation with additional objects on the left and right, I got a message from the solve "turbulent viscosity limited to viscosity ratio of 1.000000e+05". I tried to increase the limiter to 2.00000e+05, but the message still appears. Then, I increased the limiter to 5.00000e+05, the message disappeared and the tendency of the unsteady force on the object was similar to that with the result at 2.0000e+05 I did the transient simulation, and the above message appears and disappears periodically during the simulation. Now I am trying to compare the solution with increasing the limiter to that with the default limiter value. I wonder if the limiter will affect the physical results, Can someone help me, thank you? |
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