CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

rhoSimpleFoam time step continuity errors

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes
  • 1 Post By deepbandivadekar

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 3, 2018, 12:19
Default rhoSimpleFoam time step continuity errors
  #1
Senior Member
 
Deep
Join Date: Oct 2017
Posts: 180
Rep Power: 9
deepbandivadekar is on a distinguished road
Hello,


I'm trying to solve a 2 streams mixing problem for a particular geometry. SO I have 2 inlets and one outlet and the mesh is completely structured for the rectangular geometry. I am getting time step continuity errors as shown below.


Code:
Create time

Create mesh for time = 0


SIMPLE: convergence criteria
    field p     tolerance 0.01
    field U     tolerance 0.0001
    field e     tolerance 0.001
    field "(k|epsilon|omega)"     tolerance 0.001

Reading thermophysical properties

Selecting thermodynamics package 
{
    type            hePsiThermo;
    mixture         pureMixture;
    transport       sutherland;
    thermo          hConst;
    equationOfState perfectGas;
    specie          specie;
    energy          sensibleInternalEnergy;
}

Reading field U

Reading/calculating face flux field phi

pressureControl
    pMax 165000
    pMin 40494

Creating turbulence model

Selecting turbulence model type laminar
Selecting laminar stress model Stokes
No MRF models present

No finite volume options present


Starting time loop

Time = 1

smoothSolver:  Solving for Ux, Initial residual = 1, Final residual = 0.0628401, No Iterations 2
smoothSolver:  Solving for Uy, Initial residual = 1, Final residual = 0.0397387, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 0.999999, Final residual = 0.0163076, No Iterations 4
smoothSolver:  Solving for e, Initial residual = 1, Final residual = 0.0169938, No Iterations 1
GAMG:  Solving for p, Initial residual = 1, Final residual = 0.0314266, No Iterations 2
time step continuity errors : sum local = 4744.53, global = -3840.24, cumulative = -3840.24
ExecutionTime = 3.93 s  ClockTime = 4 s

Time = 2

smoothSolver:  Solving for Ux, Initial residual = 0.112653, Final residual = 0.00870741, No Iterations 4
smoothSolver:  Solving for Uy, Initial residual = 0.663654, Final residual = 0.011927, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 0.169241, Final residual = 0.0155358, No Iterations 4
smoothSolver:  Solving for e, Initial residual = 0.807748, Final residual = 0.00160731, No Iterations 1
GAMG:  Solving for p, Initial residual = 0.978126, Final residual = 0.0452374, No Iterations 6
time step continuity errors : sum local = 1138.37, global = -218.941, cumulative = -4059.18
pressureControl: p max 275246
ExecutionTime = 7.25 s  ClockTime = 8 s

Time = 3

smoothSolver:  Solving for Ux, Initial residual = 0.152194, Final residual = 0.00842596, No Iterations 4
smoothSolver:  Solving for Uy, Initial residual = 0.5878, Final residual = 0.0443492, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 0.0984365, Final residual = 0.0096684, No Iterations 4
smoothSolver:  Solving for e, Initial residual = 0.313931, Final residual = 0.00362717, No Iterations 1
[mae-hen-8163-db:22471] *** Process received signal ***
[mae-hen-8163-db:22471] Signal: Floating point exception (8)
[mae-hen-8163-db:22471] Signal code:  (-6)
[mae-hen-8163-db:22471] Failing at address: 0x3e9000057c7
[mae-hen-8163-db:22468] *** Process received signal ***
[mae-hen-8163-db:22468] Signal: Floating point exception (8)
[mae-hen-8163-db:22468] Signal code:  (-6)
[mae-hen-8163-db:22468] Failing at address: 0x3e9000057c4
[mae-hen-8163-db:22468] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fea736c4f20]
[mae-hen-8163-db:22468] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7fea736c4e97]
[mae-hen-8163-db:22468] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fea736c4f20]
[mae-hen-8163-db:22468] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7fea7919b825]
[mae-hen-8163-db:22468] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7fea791ad87a]
[mae-hen-8163-db:22468] [ 5] rhoSimpleFoam(+0x2ae46)[0x55ae34731e46]
[mae-hen-8163-db:22468] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fea736a7b97]
[mae-hen-8163-db:22468] [ 7] rhoSimpleFoam(+0x2f96a)[0x55ae3473696a]
[mae-hen-8163-db:22468] *** End of error message ***
[mae-hen-8163-db:22471] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f76cdac4f20]
[mae-hen-8163-db:22471] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f76cdac4e97]
[mae-hen-8163-db:22471] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f76cdac4f20]
[mae-hen-8163-db:22471] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7f76d359b825]
[mae-hen-8163-db:22471] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7f76d35ad87a]
[mae-hen-8163-db:22471] [ 5] rhoSimpleFoam(+0x2ae46)[0x5580f29cae46]
[mae-hen-8163-db:22471] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f76cdaa7b97]
[mae-hen-8163-db:22471] [ 7] rhoSimpleFoam(+0x2f96a)[0x5580f29cf96a]
[mae-hen-8163-db:22471] *** End of error message ***
[mae-hen-8163-db:22470] *** Process received signal ***
[mae-hen-8163-db:22470] Signal: Floating point exception (8)
[mae-hen-8163-db:22470] Signal code:  (-6)
[mae-hen-8163-db:22470] Failing at address: 0x3e9000057c6
[mae-hen-8163-db:22470] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fd153bc5f20]
[mae-hen-8163-db:22470] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7fd153bc5e97]
[mae-hen-8163-db:22470] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fd153bc5f20]
[mae-hen-8163-db:22470] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7fd15969c825]
[mae-hen-8163-db:22470] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7fd1596ae87a]
[mae-hen-8163-db:22470] [ 5] rhoSimpleFoam(+0x2ae46)[0x5569ee4d0e46]
[mae-hen-8163-db:22470] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fd153ba8b97]
[mae-hen-8163-db:22470] [ 7] rhoSimpleFoam(+0x2f96a)[0x5569ee4d596a]
[mae-hen-8163-db:22470] *** End of error message ***
[mae-hen-8163-db:22469] *** Process received signal ***
[mae-hen-8163-db:22469] Signal: Floating point exception (8)
[mae-hen-8163-db:22469] Signal code:  (-6)
[mae-hen-8163-db:22469] Failing at address: 0x3e9000057c5
[mae-hen-8163-db:22469] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f09068fcf20]
[mae-hen-8163-db:22469] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f09068fce97]
[mae-hen-8163-db:22469] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f09068fcf20]
[mae-hen-8163-db:22469] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7f090c3d3825]
[mae-hen-8163-db:22469] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7f090c3e587a]
[mae-hen-8163-db:22469] [ 5] rhoSimpleFoam(+0x2ae46)[0x55a1f26bee46]
[mae-hen-8163-db:22469] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f09068dfb97]
[mae-hen-8163-db:22469] [ 7] rhoSimpleFoam(+0x2f96a)[0x55a1f26c396a]
[mae-hen-8163-db:22469] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 0 with PID 0 on node mae-hen-8163-db exited on signal 8 (Floating point exception).
--------------------------------------------------------------------------
I noted that the max pressure
Code:
time step continuity errors : sum local = 1138.37, global = -218.941, cumulative = -4059.18
pressureControl: p max 275246
probably was going beyond the set limits:
Code:
pressureControl
    pMax 165000
    pMin 40494
So I changed the criteria in fvSolutions and increased pMax coefficient to 3.5. But this did not change the situation.


New errors do not include the pMax warning line but solver fails nonetheless:
Code:
Create time

Create mesh for time = 0


SIMPLE: convergence criteria
    field p     tolerance 0.01
    field U     tolerance 0.0001
    field e     tolerance 0.001
    field "(k|epsilon|omega)"     tolerance 0.001

Reading thermophysical properties

Selecting thermodynamics package 
{
    type            hePsiThermo;
    mixture         pureMixture;
    transport       sutherland;
    thermo          hConst;
    equationOfState perfectGas;
    specie          specie;
    energy          sensibleInternalEnergy;
}

Reading field U

Reading/calculating face flux field phi

pressureControl
    pMax 385000
    pMin 40494

Creating turbulence model

Selecting turbulence model type laminar
Selecting laminar stress model Stokes
No MRF models present

No finite volume options present


Starting time loop

Time = 1

smoothSolver:  Solving for Ux, Initial residual = 1, Final residual = 0.0628742, No Iterations 2
smoothSolver:  Solving for Uy, Initial residual = 1, Final residual = 0.0397387, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 0.999999, Final residual = 0.0163076, No Iterations 4
smoothSolver:  Solving for e, Initial residual = 1, Final residual = 0.0169938, No Iterations 1
GAMG:  Solving for p, Initial residual = 1, Final residual = 0.0314271, No Iterations 2
time step continuity errors : sum local = 4744.6, global = -3840.21, cumulative = -3840.21
ExecutionTime = 4.31 s  ClockTime = 4 s

Time = 2

smoothSolver:  Solving for Ux, Initial residual = 0.112656, Final residual = 0.00870786, No Iterations 4
smoothSolver:  Solving for Uy, Initial residual = 0.663654, Final residual = 0.0119271, No Iterations 2
smoothSolver:  Solving for Uz, Initial residual = 0.169241, Final residual = 0.015536, No Iterations 4
smoothSolver:  Solving for e, Initial residual = 0.807748, Final residual = 0.0016073, No Iterations 1
GAMG:  Solving for p, Initial residual = 0.978126, Final residual = 0.0452372, No Iterations 6
time step continuity errors : sum local = 1138.36, global = -218.941, cumulative = -4059.15
ExecutionTime = 7.28 s  ClockTime = 7 s

Time = 3

smoothSolver:  Solving for Ux, Initial residual = 0.280108, Final residual = 0.0257687, No Iterations 4
smoothSolver:  Solving for Uy, Initial residual = 0.805069, Final residual = 0.0705581, No Iterations 4
smoothSolver:  Solving for Uz, Initial residual = 0.473923, Final residual = 0.0284756, No Iterations 6
smoothSolver:  Solving for e, Initial residual = 0.528692, Final residual = 0.00947931, No Iterations 1
[mae-hen-8163-db:24641] *** Process received signal ***
[mae-hen-8163-db:24641] Signal: Floating point exception (8)
[mae-hen-8163-db:24641] Signal code:  (-6)
[mae-hen-8163-db:24641] Failing at address: 0x3e900006041
[mae-hen-8163-db:24641] [mae-hen-8163-db:24639] *** Process received signal ***
[mae-hen-8163-db:24639] Signal: Floating point exception (8)
[mae-hen-8163-db:24639] Signal code:  (-6)
[mae-hen-8163-db:24639] Failing at address: 0x3e90000603f
[mae-hen-8163-db:24639] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f0e3850af20]
[mae-hen-8163-db:24639] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f0e3850ae97]
[mae-hen-8163-db:24639] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f0e3850af20]
[mae-hen-8163-db:24639] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7f0e3dfe1825]
[ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fa802966f20]
[mae-hen-8163-db:24641] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7fa802966e97]
[mae-hen-8163-db:24641] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fa802966f20]
[mae-hen-8163-db:24641] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7fa80843d825]
[mae-hen-8163-db:24641] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7fa80844f87a]
[mae-hen-8163-db:24641] [ 5] rhoSimpleFoam(+0x2ae46)[0x559c59b77e46]
[mae-hen-8163-db:24641] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fa802949b97]
[mae-hen-8163-db:24641] [ 7] rhoSimpleFoam(+0x2f96a)[0x559c59b7c96a]
[mae-hen-8163-db:24641] *** End of error message ***
[mae-hen-8163-db:24639] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7f0e3dff387a]
[mae-hen-8163-db:24639] [ 5] rhoSimpleFoam(+0x2ae46)[0x558b08c76e46]
[mae-hen-8163-db:24639] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f0e384edb97]
[mae-hen-8163-db:24639] [ 7] rhoSimpleFoam(+0x2f96a)[0x558b08c7b96a]
[mae-hen-8163-db:24639] *** End of error message ***
[mae-hen-8163-db:24638] *** Process received signal ***
[mae-hen-8163-db:24638] Signal: Floating point exception (8)
[mae-hen-8163-db:24638] Signal code:  (-6)
[mae-hen-8163-db:24638] Failing at address: 0x3e90000603e
[mae-hen-8163-db:24638] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fafff9cbf20]
[mae-hen-8163-db:24638] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7fafff9cbe97]
[mae-hen-8163-db:24638] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7fafff9cbf20]
[mae-hen-8163-db:24638] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7fb0054a2825]
[mae-hen-8163-db:24638] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7fb0054b487a]
[mae-hen-8163-db:24638] [ 5] rhoSimpleFoam([mae-hen-8163-db:24640] *** Process received signal ***
+0x2ae46)[0x55c13f784e46]
[mae-hen-8163-db:24638] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fafff9aeb97]
[mae-hen-8163-db:24638] [ 7] rhoSimpleFoam(+0x2f96a)[0x55c13f78996a]
[mae-hen-8163-db:24638] *** End of error message ***
[mae-hen-8163-db:24640] Signal: Floating point exception (8)
[mae-hen-8163-db:24640] Signal code:  (-6)
[mae-hen-8163-db:24640] Failing at address: 0x3e900006040
[mae-hen-8163-db:24640] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f2b6052bf20]
[mae-hen-8163-db:24640] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f2b6052be97]
[mae-hen-8163-db:24640] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20)[0x7f2b6052bf20]
[mae-hen-8163-db:24640] [ 3] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE9calculateEv+0x305)[0x7f2b66002825]
[mae-hen-8163-db:24640] [ 4] /opt/openfoam5/platforms/linux64GccDPInt32Opt/lib/libfluidThermophysicalModels.so(_ZN4Foam11hePsiThermoINS_9psiThermoENS_11pureMixtureINS_19sutherlandTransportINS_7species6thermoINS_12hConstThermoINS_10perfectGasINS_6specieEEEEENS_22sensibleInternalEnergyEEEEEEEE7correctEv+0x2a)[0x7f2b6601487a]
[mae-hen-8163-db:24640] [ 5] rhoSimpleFoam(+0x2ae46)[0x5632368e1e46]
[mae-hen-8163-db:24640] [ 6] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f2b6050eb97]
[mae-hen-8163-db:24640] [ 7] rhoSimpleFoam(+0x2f96a)[0x5632368e696a]
[mae-hen-8163-db:24640] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 1 with PID 0 on node mae-hen-8163-db exited on signal 8 (Floating point exception).
--------------------------------------------------------------------------
I have following boundary conditions for the fully laminar case:

U
Code:
inlet1: flowRateInletVelocity;
        volumetricFlowRate    constant 0.0011; 

inlet2: flowRateInletVelocity;
        volumetricFlowRate   constant 1e-5;


outlet: inletOutlet
p
Code:
inlet1: zeroGradient;


inlet2: fixedValue; 
       value            uniform 1.1e5;


outlet: fixedValue; 
       value            $internalField;
The pressure inlet for inlet 2 is a requirement and cannot be changed. fvSolution and fvSchemes are exactly as the tutorials for rhoSimpleFoam.


Does anyone spot a problem in here? Why am I getting the time step errors for a seemingly very simple problem?
deepbandivadekar is offline   Reply With Quote

Old   September 12, 2018, 17:29
Default
  #2
New Member
 
Thomas M
Join Date: Aug 2018
Posts: 20
Rep Power: 8
tmik is on a distinguished road
Quote:
So I changed the criteria in fvSolutions and increased pMax coefficient to 3.5. But this did not change the situation.

Where and how did you change fvSolutions to include pMax? Could you provide the code you used for this?
tmik is offline   Reply With Quote

Old   September 13, 2018, 06:50
Default
  #3
Senior Member
 
Deep
Join Date: Oct 2017
Posts: 180
Rep Power: 9
deepbandivadekar is on a distinguished road
Quote:
Originally Posted by tmik View Post
Where and how did you change fvSolutions to include pMax? Could you provide the code you used for this?

In the SIMPLE subdictionary of fvSolutions:
Code:
SIMPLE
{
    nNonOrthogonalCorrectors 0;
    pMinFactor      0.4;
    pMaxFactor      1.5;

    residualControl
    {
        p               1e-2;
        U               1e-4;
        e               1e-3;
        "(k|epsilon|omega)" 1e-3;
    }
}
However, be aware that this could be a superficial solution. Like in my case, the real reason for the issue could be somewhere in the setup. For me, it was bad boundary conditions. I managed to get past this error.
tmik likes this.
deepbandivadekar is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
High Courant Number @ icoFoam Artex85 OpenFOAM Running, Solving & CFD 11 February 16, 2017 14:40
Floating point exception error lpz_michele OpenFOAM Running, Solving & CFD 53 October 19, 2015 03:50
InterFoam negative alpha karasa03 OpenFOAM 7 December 12, 2013 04:41
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 03:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07


All times are GMT -4. The time now is 13:31.