# SLTS+rhoPisoFoam: what is rDeltaT???

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October 2, 2010, 16:06
SLTS+rhoPisoFoam: what is rDeltaT???
#1
Senior Member

Nilesh Rane
Join Date: Apr 2010
Posts: 122
Rep Power: 15
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.
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 October 3, 2010, 21:10 #2 Senior Member   Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 35 Please, stop asking the same question (point 3) in multiple threads. You simply invite member to avoid you posts in this way. Best, __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

October 9, 2010, 13:12
#3
Senior Member

Nilesh Rane
Join Date: Apr 2010
Posts: 122
Rep Power: 15
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::T(scalar f, scalar T0, scalar (specieThermo::*F)(const scalar) const, scalar (specieThermo::*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:rintStack(Foam::Ostream&) in "/opt/openfoam170/lib/linux64GccDPOpt/libOpenFOAM.so" #1 Foam::error::abort() in "/opt/openfoam170/lib/linux64GccDPOpt/libOpenFOAM.so" #2 Foam::hPsiThermo > > > >::calculate() in "/opt/openfoam170/lib/linux64GccDPOpt/libbasicThermophysicalModels.so" #3 Foam::hPsiThermo > > > >::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.
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???
Attached Files
 test_dict.tar.gz (8.6 KB, 20 views)
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Imagination is more important than knowledge..

 February 24, 2013, 15:28 #4 Senior Member     Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 25 did you find a useful answer or solve the problem yourself?

February 25, 2013, 04:13
#5
Senior Member

Join Date: Mar 2011
Location: Covilha,Portugal
Posts: 153
Rep Power: 14
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 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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