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-   -   SLTS+rhoPisoFoam: what is rDeltaT??? (http://www.cfd-online.com/Forums/openfoam-solving/80661-slts-rhopisofoam-what-rdeltat.html)

nileshjrane October 2, 2010 16:06

SLTS+rhoPisoFoam: what is rDeltaT???
 
Hi,

I am trying to run a simulation with "rhoPisoFoam + SLTS" formulation. i get following output:

Quote:

Courant Number mean: 0.00109595 max: 0.134916
Time = 0.000135

max/min rDeltaT 1e+06 1e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 0.00216836, Final residual = 5.95335e-12, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 0.00216836, Final residual = 8.19027e-12, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 0.00227908, Final residual = 9.71519e-12, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.00431117, Final residual = 2.32353e-11, No Iterations 2
DICPCG: Solving for p, Initial residual = 0.00465754, Final residual = 1.65891e-09, No Iterations 8
DICPCG: Solving for p, Initial residual = 1.58204e-06, Final residual = 2.77425e-09, No Iterations 1
DICPCG: Solving for p, Initial residual = 7.12226e-08, Final residual = 4.12882e-10, No Iterations 1
max/min rDeltaT 1e+06 1e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.12475e-11, global = -9.13462e-13, cumulative = -6.35946e-11
DILUPBiCG: Solving for h, Initial residual = 0.000128269, Final residual = 3.68573e-12, No Iterations 2
DICPCG: Solving for p, Initial residual = 4.51694e-05, Final residual = 6.46756e-09, No Iterations 3
DICPCG: Solving for p, Initial residual = 6.96704e-08, Final residual = 9.62289e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.36685e-08, Final residual = 3.97835e-10, No Iterations 1
max/min rDeltaT 1e+06 1e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.04729e-11, global = -1.66767e-12, cumulative = -6.52623e-11
DILUPBiCG: Solving for h, Initial residual = 3.84611e-05, Final residual = 5.3167e-13, No Iterations 2
DICPCG: Solving for p, Initial residual = 1.28521e-05, Final residual = 6.94445e-09, No Iterations 2
DICPCG: Solving for p, Initial residual = 2.83128e-08, Final residual = 5.67658e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 9.5842e-09, Final residual = 9.5842e-09, No Iterations 0
max/min rDeltaT 1e+06 1e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 4.93205e-10, global = -2.18094e-12, cumulative = -6.74433e-11
DILUPBiCG: Solving for h, Initial residual = 1.0928e-05, Final residual = 1.54422e-13, No Iterations 2
DICPCG: Solving for p, Initial residual = 3.65805e-06, Final residual = 5.34093e-09, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.67414e-08, Final residual = 7.06246e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 9.21241e-09, Final residual = 9.21241e-09, No Iterations 0
max/min rDeltaT 1e+06 1e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 4.74072e-10, global = -9.12725e-13, cumulative = -6.8356e-11
DILUPBiCG: Solving for epsilon, Initial residual = 0.00112197, Final residual = 1.42148e-07, No Iterations 1
DILUPBiCG: Solving for k, Initial residual = 0.000477469, Final residual = 3.86077e-08, No Iterations 1
ExecutionTime = 200.02 s ClockTime = 200 s
1) What it rDeltaT in this output????

2) Also i am using ddtscheme as: SLTS phi rho 1
what does this verbatim means??? can anyone explain??

3) Why the solver does not solve rho equation?? Though rhoPisoFoam has rhoEqn.H file included in its code, it does not seem to actually solve the density equation. Why??

Thank you.

alberto October 3, 2010 21:10

Please, stop asking the same question (point 3) in multiple threads. You simply invite member to avoid you posts in this way.

Best,

nileshjrane October 9, 2010 13:12

1 Attachment(s)
The solver is running for my case but the solution blows up every time with the same error.
Quote:

Courant Number mean: 0.00354648 max: 0.679683
Time = 0.0037261

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.53976e-05, Final residual = 2.03391e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.5395e-05, Final residual = 1.83841e-10, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.30471e-05, Final residual = 1.07028e-10, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000106631, Final residual = 8.77664e-12, No Iterations 2


--> FOAM FATAL ERROR:
Maximum number of iterations exceeded

From function specieThermo<thermo>::T(scalar f, scalar T0, scalar (specieThermo<thermo>::*F)(const scalar) const, scalar (specieThermo<thermo>::*dFdT)(const scalar) const) const
in file /home/opencfd/OpenFOAM/OpenFOAM-1.7.0/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 67.

FOAM aborting

#0 Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam170/lib/linux64GccDPOpt/libOpenFOAM.so"
#1 Foam::error::abort() in "/opt/openfoam170/lib/linux64GccDPOpt/libOpenFOAM.so"
#2 Foam::hPsiThermo<Foam::pureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::calculate() in "/opt/openfoam170/lib/linux64GccDPOpt/libbasicThermophysicalModels.so"
#3 Foam::hPsiThermo<Foam::pureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::correct() in "/opt/openfoam170/lib/linux64GccDPOpt/libbasicThermophysicalModels.so"
#4
in "/opt/openfoam170/applications/bin/linux64GccDPOpt/rhoPisoFoam"
#5 __libc_start_main in "/lib/libc.so.6"
#6
in "/opt/openfoam170/applications/bin/linux64GccDPOpt/rhoPisoFoam"
Aborted
i am using dt = 5e-7 and this is after about 18000 iterations. I was thinking it may be due to mesh (as i had some bad cells but i coarsen the mess to remove them) but for any refinement of mesh same error comes sooner or later.:mad:
I have no idea what is happening. The previous iterations of this error are like this:
Quote:

Courant Number mean: 0.0035434 max: 0.67957
Time = 0.0037231

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.47538e-05, Final residual = 5.89798e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.47519e-05, Final residual = 2.56716e-11, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.31102e-05, Final residual = 3.07625e-10, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000104156, Final residual = 2.91181e-11, No Iterations 3
DICPCG: Solving for p, Initial residual = 0.000298353, Final residual = 6.23473e-11, No Iterations 4
DICPCG: Solving for p, Initial residual = 3.2351e-09, Final residual = 1.36747e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.47306e-11, Final residual = 1.47306e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.35192e-12, global = 1.18928e-13, cumulative = -1.40035e-08
DILUPBiCG: Solving for h, Initial residual = 4.48279e-07, Final residual = 7.38694e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 8.14851e-07, Final residual = 6.07478e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 6.24927e-10, Final residual = 6.24927e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 6.24927e-10, Final residual = 6.24927e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 9.97777e-11, global = -2.00637e-11, cumulative = -1.40235e-08
DILUPBiCG: Solving for h, Initial residual = 1.63547e-07, Final residual = 4.80754e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.40479e-07, Final residual = 2.30215e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.33317e-10, Final residual = 2.33317e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 2.33317e-10, Final residual = 2.33317e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.72521e-11, global = -7.4639e-12, cumulative = -1.4031e-08
DILUPBiCG: Solving for epsilon, Initial residual = 3.84863e-05, Final residual = 4.06305e-09, No Iterations 2
DILUPBiCG: Solving for k, Initial residual = 0.000107374, Final residual = 2.70012e-09, No Iterations 3
ExecutionTime = 8669.04 s ClockTime = 8685 s

Courant Number mean: 0.00354388 max: 0.679428
Time = 0.0037236

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.48147e-05, Final residual = 5.71567e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.48132e-05, Final residual = 3.27098e-11, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.30848e-05, Final residual = 2.99731e-10, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000104212, Final residual = 3.50997e-11, No Iterations 3
DICPCG: Solving for p, Initial residual = 0.000298071, Final residual = 6.05212e-11, No Iterations 4
DICPCG: Solving for p, Initial residual = 3.2334e-09, Final residual = 1.35503e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.46088e-11, Final residual = 1.46088e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.33497e-12, global = 1.0802e-13, cumulative = -1.40309e-08
DILUPBiCG: Solving for h, Initial residual = 4.49794e-07, Final residual = 6.7044e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 8.21043e-07, Final residual = 5.96736e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 6.15629e-10, Final residual = 6.15629e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 6.15629e-10, Final residual = 6.15629e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 9.83981e-11, global = -1.92422e-11, cumulative = -1.40501e-08
DILUPBiCG: Solving for h, Initial residual = 1.64349e-07, Final residual = 4.4336e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.42378e-07, Final residual = 2.2479e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.28433e-10, Final residual = 2.28433e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 2.28433e-10, Final residual = 2.28433e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.65113e-11, global = -6.76352e-12, cumulative = -1.40569e-08
DILUPBiCG: Solving for epsilon, Initial residual = 3.97468e-05, Final residual = 3.11315e-09, No Iterations 2
DILUPBiCG: Solving for k, Initial residual = 0.000107488, Final residual = 1.36487e-09, No Iterations 3
ExecutionTime = 8670.24 s ClockTime = 8687 s

Courant Number mean: 0.00354437 max: 0.679605
Time = 0.0037241

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.48754e-05, Final residual = 5.21046e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.48736e-05, Final residual = 2.59287e-11, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.30597e-05, Final residual = 2.90387e-10, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000104269, Final residual = 4.98131e-11, No Iterations 3
DICPCG: Solving for p, Initial residual = 0.000297793, Final residual = 6.14915e-11, No Iterations 4
DICPCG: Solving for p, Initial residual = 3.23374e-09, Final residual = 1.36299e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.46756e-11, Final residual = 1.46756e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.34815e-12, global = 9.8239e-14, cumulative = -1.40568e-08
DILUPBiCG: Solving for h, Initial residual = 4.50745e-07, Final residual = 5.91696e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 8.30424e-07, Final residual = 5.81911e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 6.04256e-10, Final residual = 6.04256e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 6.04256e-10, Final residual = 6.04256e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 9.66837e-11, global = -2.02358e-11, cumulative = -1.4077e-08
DILUPBiCG: Solving for h, Initial residual = 1.65633e-07, Final residual = 3.89582e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.45129e-07, Final residual = 2.1669e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.21442e-10, Final residual = 2.21442e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 2.21442e-10, Final residual = 2.21442e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.54318e-11, global = -7.67834e-12, cumulative = -1.40847e-08
DILUPBiCG: Solving for epsilon, Initial residual = 3.92047e-05, Final residual = 4.26967e-09, No Iterations 2
DILUPBiCG: Solving for k, Initial residual = 0.000107961, Final residual = 2.27384e-09, No Iterations 3
ExecutionTime = 8671.49 s ClockTime = 8688 s

Courant Number mean: 0.00354485 max: 0.679465
Time = 0.0037246

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.49339e-05, Final residual = 4.96079e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.49328e-05, Final residual = 3.16664e-11, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.3035e-05, Final residual = 2.91481e-10, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000104328, Final residual = 5.38104e-11, No Iterations 3
DICPCG: Solving for p, Initial residual = 0.00029752, Final residual = 6.44541e-11, No Iterations 4
DICPCG: Solving for p, Initial residual = 3.23785e-09, Final residual = 1.2477e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.36199e-11, Final residual = 1.36199e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.18158e-12, global = 8.94073e-14, cumulative = -1.40846e-08
DILUPBiCG: Solving for h, Initial residual = 4.54142e-07, Final residual = 5.31971e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 8.46755e-07, Final residual = 5.6882e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 5.95042e-10, Final residual = 5.95042e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 5.95042e-10, Final residual = 5.95042e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 9.53121e-11, global = -1.96232e-11, cumulative = -1.41043e-08
DILUPBiCG: Solving for h, Initial residual = 1.67816e-07, Final residual = 3.15073e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.4946e-07, Final residual = 2.08513e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.14653e-10, Final residual = 2.14653e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 2.14653e-10, Final residual = 2.14653e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.43827e-11, global = -7.12666e-12, cumulative = -1.41114e-08
DILUPBiCG: Solving for epsilon, Initial residual = 3.91743e-05, Final residual = 3.18336e-09, No Iterations 2
DILUPBiCG: Solving for k, Initial residual = 0.000107468, Final residual = 1.26203e-09, No Iterations 3
ExecutionTime = 8672.7 s ClockTime = 8689 s

Courant Number mean: 0.00354536 max: 0.679643
Time = 0.0037251

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.4993e-05, Final residual = 4.42375e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.49907e-05, Final residual = 2.55362e-11, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.30111e-05, Final residual = 3.7087e-10, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000104393, Final residual = 7.15166e-10, No Iterations 2
DICPCG: Solving for p, Initial residual = 0.000297328, Final residual = 6.77169e-11, No Iterations 4
DICPCG: Solving for p, Initial residual = 3.26031e-09, Final residual = 1.19516e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.31721e-11, Final residual = 1.31721e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 2.11217e-12, global = 8.49778e-14, cumulative = -1.41113e-08
DILUPBiCG: Solving for h, Initial residual = 4.67626e-07, Final residual = 8.48809e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 8.92108e-07, Final residual = 5.50766e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 5.96987e-10, Final residual = 5.96987e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 5.96987e-10, Final residual = 5.96987e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 9.57334e-11, global = -2.11679e-11, cumulative = -1.41325e-08
DILUPBiCG: Solving for h, Initial residual = 1.78269e-07, Final residual = 3.54514e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 3.18546e-07, Final residual = 2.00728e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.22341e-10, Final residual = 2.22341e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 2.22341e-10, Final residual = 2.22341e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.56558e-11, global = -8.38315e-12, cumulative = -1.41408e-08
DILUPBiCG: Solving for epsilon, Initial residual = 3.8649e-05, Final residual = 3.20512e-09, No Iterations 2
DILUPBiCG: Solving for k, Initial residual = 0.000107243, Final residual = 1.87158e-09, No Iterations 3
ExecutionTime = 8673.92 s ClockTime = 8690 s

Courant Number mean: 0.00354595 max: 0.679504
Time = 0.0037256

max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 9.50726e-05, Final residual = 6.34254e-11, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 9.50705e-05, Final residual = 4.14365e-11, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 4.29908e-05, Final residual = 6.82635e-11, No Iterations 2
DILUPBiCG: Solving for h, Initial residual = 0.000104487, Final residual = 9.30953e-11, No Iterations 2
DICPCG: Solving for p, Initial residual = 0.000297379, Final residual = 6.67512e-11, No Iterations 4
DICPCG: Solving for p, Initial residual = 3.40532e-09, Final residual = 1.01917e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.1708e-11, Final residual = 1.1708e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 1.8795e-12, global = 8.2022e-14, cumulative = -1.41408e-08
DILUPBiCG: Solving for h, Initial residual = 5.94087e-07, Final residual = 3.38412e-13, No Iterations 2
DICPCG: Solving for p, Initial residual = 1.49131e-06, Final residual = 6.2518e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 9.24169e-10, Final residual = 9.24169e-10, No Iterations 0
DICPCG: Solving for p, Initial residual = 9.24169e-10, Final residual = 9.24169e-10, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 1.4833e-10, global = -1.70698e-11, cumulative = -1.41578e-08
DILUPBiCG: Solving for h, Initial residual = 3.67724e-07, Final residual = 7.27084e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.93213e-06, Final residual = 3.93208e-10, No Iterations 1
DICPCG: Solving for p, Initial residual = 1.77374e-09, Final residual = 2.01048e-11, No Iterations 1
DICPCG: Solving for p, Initial residual = 2.02113e-11, Final residual = 2.02113e-11, No Iterations 0
max/min rDeltaT 2e+06 2e+06
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 3.24397e-12, global = -6.93116e-13, cumulative = -1.41585e-08
DILUPBiCG: Solving for epsilon, Initial residual = 3.92201e-05, Final residual = 3.29869e-09, No Iterations 2
DILUPBiCG: Solving for k, Initial residual = 0.000108277, Final residual = 9.41906e-09, No Iterations 3
ExecutionTime = 8675.14 s ClockTime = 8692 s

Till the penultimate iteration everything seems fine, residual values going down an all.
Attaching my case setup here. Any suggestions???

immortality February 24, 2013 16:28

did you find a useful answer or solve the problem yourself?

mm.abdollahzadeh February 25, 2013 05:13

rDeltaT is simply the inverce of your deltaT. Im not sure that the rhopisoFoam itself has the the rDelatT calculation.

if your case is blowing ... reduce your time step , one guess Comax=0.2.
and check also your schemes for div and interpolation. for start u can use upwind.
also your boundary condition are important.

Best
Mahdi

Quote:

Originally Posted by nileshjrane (Post 277510)
Hi,

I am trying to run a simulation with "rhoPisoFoam + SLTS" formulation. i get following output:



1) What it rDeltaT in this output????

2) Also i am using ddtscheme as: SLTS phi rho 1
what does this verbatim means??? can anyone explain??

3) Why the solver does not solve rho equation?? Though rhoPisoFoam has rhoEqn.H file included in its code, it does not seem to actually solve the density equation. Why??

Thank you.



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