Fluids

Fluids

Number of iterations

    • chebusann
      Subscriber

      I have a case aerodynamic study in Fluent and this are the console results. I have bold a line because I have a question: is showing the "31.6% area" that I have to do more iterations and reach 100%? (I delete some iterations because I have a maximum string length)


       


      iter  continuity  x-velocity  y-velocity  z-velocity           k     epsilon  report-def  report-def  report-def     time/iter


           1  1.0000e+00  1.7134e-03  1.6170e-03  1.5933e-03  4.3564e-02  2.6084e-01  6.4903e+02 -3.9766e+02  4.0022e-01 71:10:21   49


           2  5.7358e-01  8.4601e-04  7.6796e-04  7.5496e-04  7.4407e-02  5.3436e-01  1.0006e+03 -5.6900e+02  6.1700e-01 56:56:00   48


           3  5.3953e-01  4.8197e-04  4.0862e-04  3.9669e-04  6.8622e-02  5.1517e-01  1.0951e+03 -6.5638e+02  6.7528e-01 45:557   47


           4  5.3315e-01  3.1709e-04  2.4409e-04  2.2439e-04  3.7624e-02  2.9377e-01  1.1048e+03 -7.2303e+02  6.8124e-01 37:16:24   46


           5  5.2147e-01  2.3988e-04  1.6651e-04  1.4712e-04  2.0914e-02  1.4628e-01  1.0914e+03 -7.9492e+02  6.7303e-01 302:16   45


           6  5.0365e-01  1.9943e-04  1.2883e-04  1.1085e-04  1.3047e-02  6.6547e-02  1.0653e+03 -8.6153e+02  6.5694e-01 25:06:08   44


           7  4.8358e-01  1.7693e-04  1.0988e-04  9.4597e-05  9.5602e-03  4.2380e-02  1.0413e+03 -9.0938e+02  6.4212e-01 20:53:04   43


       


      [...]


       


        Reversed flow on 7 faces (0.0% area) of pressure-outlet 6.


          32  3.0350e-01  1.0216e-04  6.0385e-05  5.6729e-05  5.9130e-03  8.9495e-03  1.0486e+03 -9.0857e+02  6.4662e-01  25:23   18


        Reversed flow on 27 faces (0.2% area) of pressure-outlet 6.


          33  3.0149e-01  1.0200e-04  6.0750e-05  5.6991e-05  5.9284e-03  9.1073e-03  1.0471e+03 -8.8195e+02  6.4569e-01  2:26:15   17


        Reversed flow on 50 faces (0.3% area) of pressure-outlet 6.


         iter  continuity  x-velocity  y-velocity  z-velocity           k     epsilon  report-def  report-def  report-def     time/iter


          34  3.0003e-01  1.0116e-04  6.0190e-05  5.7113e-05  6.0121e-03  9.4235e-03  1.0456e+03 -8.5158e+02  6.4477e-01  2:19:49   16


        Reversed flow on 75 faces (0.4% area) of pressure-outlet 6.


          35  2.9977e-01  1.0131e-04  6.0697e-05  5.7369e-05  5.9300e-03  9.0066e-03  1.0460e+03 -8.3427e+02  6.4498e-01  2:09:25   15


        Reversed flow on 94 faces (0.5% area) of pressure-outlet 6.


          36  2.9733e-01  1.0167e-04  6.0292e-05  5.6916e-05  5.7783e-03  8.3789e-03  1.0436e+03 -8.4755e+02  6.4352e-01  2:01:47   14


        Reversed flow on 112 faces (0.6% area) of pressure-outlet 6.


          37  2.9309e-01  9.8914e-05  5.7807e-05  5.6122e-05  5.9848e-03  8.0985e-03  1.0396e+03 -8.7381e+02  6.4107e-01  1:52:50   13


        Reversed flow on 131 faces (0.7% area) of pressure-outlet 6.


          38  2.8915e-01  9.6684e-05  5.6503e-05  5.4908e-05  6.3186e-03  7.6446e-03  1.0369e+03 -8.8882e+02  6.3942e-01  1:45:09   12


        Reversed flow on 162 faces (0.9% area) of pressure-outlet 6.


       


       


      [...]


       


        Reversed flow on 6586 faces (31.6% area) of pressure-outlet 6.


          49  5.9814e-01  9.2525e-03  5.2563e-03  5.4702e-03  3.0023e-03  2.6722e-02  7.2016e+02 -3.3076e+02  4.4408e-01  0:082    1


        turbulent viscosity limited to viscosity ratio of 1.000000e+07 in 65333 cells 


        Reversed flow on 7817 faces (37.7% area) of pressure-outlet 6.


          50  6.8826e-01  7.7733e-03  4.4128e-03  4.3717e-03  1.6586e-03  1.9767e-02  6.8745e+02 -1.0093e+02  4.2391e-01  0:00:00    0


      Writing data to D:fkltdCYBERTRUCKPROJECTtruck_filesdp0FFFFluentFFF.1.ip ...


      x-coord


      y-coord


      z-coord


      pressure


      x-velocity


      y-velocity


      z-velocity


      k


      epsilon


      hyb_init-0


      hyb_init-1

    • RK
      Ansys Employee

      Hello, 


      It is not that you necessarily have to run more iterations, it just shows the number of faces where reversed flow is occurring. 

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