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pisoFOAM (LES) - internal pipe flow - convergence

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Old   January 11, 2018, 17:39
Default pisoFOAM (LES) - internal pipe flow - convergence
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gu1
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Guilherme
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Hello,

First, I'm using OpenFOAM 5.0 (LES - Smagorinsky), the mesh and all my settings:

Re=5300 (R = 0,00635 - L=4D)

LINK

I start the field in RANS (steadyState - simpleFOAM) and later I make a copy of the folder with intention to start the simulations in LES (pisoFOAM). The way I do this is explained in the file - can also be seen in the tutorial (/openfoam5/tutorials/incompressible/pisoFoam/LES/motorBike).
I get the convergence of my model in RANS, but unfortunately I'm not getting success in LES (images are attached in the file).

I would like help in understanding my problem.

A piece of my log.LES:

Quote:
Time = 0.0733

Courant Number mean: 0.253974 max: 0.322755
smoothSolver: Solving for Ux, Initial residual = 0.000214786, Final residual = 7.94588e-07, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.00705746, Final residual = 1.94223e-07, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.00679882, Final residual = 1.82194e-07, No Iterations 4
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.45241
GAMG: Solving for p, Initial residual = 0.00328536, Final residual = 5.01784e-08, No Iterations 10
time step continuity errors : sum local = 3.70105e-14, global = -3.33048e-15, cumulative = -1.12136e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44863
GAMG: Solving for p, Initial residual = 0.00284356, Final residual = 5.43481e-08, No Iterations 8
time step continuity errors : sum local = 3.94726e-14, global = -3.33182e-15, cumulative = -1.12136e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44862
ExecutionTime = 2324.43 s ClockTime = 2779 s

Time = 0.0734

Courant Number mean: 0.253974 max: 0.322785
smoothSolver: Solving for Ux, Initial residual = 0.000214523, Final residual = 7.93798e-07, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.00706418, Final residual = 1.94689e-07, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.00680039, Final residual = 1.8226e-07, No Iterations 4
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.45172
GAMG: Solving for p, Initial residual = 0.0032904, Final residual = 6.66269e-08, No Iterations 12
time step continuity errors : sum local = 4.53856e-14, global = -3.31268e-15, cumulative = -1.12137e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44794
GAMG: Solving for p, Initial residual = 0.002843, Final residual = 5.37448e-08, No Iterations 8
time step continuity errors : sum local = 3.90388e-14, global = -3.31789e-15, cumulative = -1.12137e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44793
ExecutionTime = 2326.63 s ClockTime = 2782 s

Time = 0.0735

Courant Number mean: 0.253974 max: 0.322815
smoothSolver: Solving for Ux, Initial residual = 0.000214261, Final residual = 7.93009e-07, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.00706801, Final residual = 1.95175e-07, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.00680185, Final residual = 1.82349e-07, No Iterations 4
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.45103
GAMG: Solving for p, Initial residual = 0.00328124, Final residual = 9.79184e-08, No Iterations 9
time step continuity errors : sum local = 6.71426e-14, global = -3.30052e-15, cumulative = -1.12137e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44725
GAMG: Solving for p, Initial residual = 0.00284218, Final residual = 5.35943e-08, No Iterations 8
time step continuity errors : sum local = 3.89138e-14, global = -3.30237e-15, cumulative = -1.12138e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44725
ExecutionTime = 2329.17 s ClockTime = 2786 s

Time = 0.0736

Courant Number mean: 0.253974 max: 0.322845
smoothSolver: Solving for Ux, Initial residual = 0.000214, Final residual = 7.92222e-07, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.00707459, Final residual = 1.95823e-07, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.00680299, Final residual = 1.82516e-07, No Iterations 4
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.45034
GAMG: Solving for p, Initial residual = 0.00327887, Final residual = 6.04934e-08, No Iterations 12
time step continuity errors : sum local = 4.10105e-14, global = -3.28271e-15, cumulative = -1.12138e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44657
GAMG: Solving for p, Initial residual = 0.00284061, Final residual = 5.39862e-08, No Iterations 8
time step continuity errors : sum local = 3.91541e-14, global = -3.28727e-15, cumulative = -1.12138e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44656
ExecutionTime = 2333.07 s ClockTime = 2790 s

Time = 0.0737

Courant Number mean: 0.253974 max: 0.322874
smoothSolver: Solving for Ux, Initial residual = 0.000213739, Final residual = 7.91435e-07, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.00707846, Final residual = 1.96574e-07, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.00680382, Final residual = 1.82761e-07, No Iterations 4
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44966
GAMG: Solving for p, Initial residual = 0.00327342, Final residual = 8.97415e-08, No Iterations 10
time step continuity errors : sum local = 6.51209e-14, global = -3.26878e-15, cumulative = -1.12139e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44589
GAMG: Solving for p, Initial residual = 0.00283945, Final residual = 5.19674e-08, No Iterations 8
time step continuity errors : sum local = 3.77594e-14, global = -3.27015e-15, cumulative = -1.12139e-09
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.44588
ExecutionTime = 2336.28 s ClockTime = 2794 s

yPlus yPlus write:
writing object yPlus
patch pipe y+ : min = 1.37516, max = 1.58274, average = 1.51294
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