CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Post-Processing

problem in solving fluent3DMeshToFoam and understanding courant number

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 8, 2020, 20:34
Default problem in solving fluent3DMeshToFoam and understanding courant number
  #1
New Member
 
vedha
Join Date: Mar 2020
Posts: 1
Rep Power: 0
itachi is on a distinguished road
i have used fluent3DMeshToFoam to create the mesh.

and changed the 0 directory as per the boundary conditions, there were no error in forming the mesh, while doing the postprocessing i got the error. The solver i used is icoFoam.i also tried to reduce the time step but no use the error is the same and i'm not sure how to use fluent3DMeshtoFoam this is my first time using the technique to input mesh from ansys Fluent and i got the error as follow


Create time

Create mesh for time = 0


PISO: Operating solver in PISO mode

Reading transportProperties

Reading field p

Reading field U

Reading/calculating face flux field phi


Starting time loop

Time = 0.25

Courant Number mean: 361.928 max: 24602.2
smoothSolver: Solving for Ux, Initial residual = 0, Final residual = 0, No Iterations 0
smoothSolver: Solving for Uy, Initial residual = 0, Final residual = 0, No Iterations 0
smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.00237241, No Iterations 1000
DICPCG: Solving for p, Initial residual = 1, Final residual = 0.0456688, No Iterations 49
time step continuity errors : sum local = 0.0505461, global = 5.83724e-05, cumulative = 5.83724e-05
DICPCG: Solving for p, Initial residual = 0.173228, Final residual = 8.70596e-07, No Iterations 124
time step continuity errors : sum local = 1.16594e-05, global = 4.54525e-08, cumulative = 5.84179e-05
ExecutionTime = 10.26 s ClockTime = 10 s

Time = 0.5

Courant Number mean: 161.446 max: 6644.71
smoothSolver: Solving for Ux, Initial residual = 0.632821, Final residual = 0.00946253, No Iterations 1000
smoothSolver: Solving for Uy, Initial residual = 0.630718, Final residual = 0.00359746, No Iterations 1000
smoothSolver: Solving for Uz, Initial residual = 0.356938, Final residual = 0.016253, No Iterations 1000
DICPCG: Solving for p, Initial residual = 0.968441, Final residual = 0.0431518, No Iterations 51
time step continuity errors : sum local = 3.95353, global = -0.0550776, cumulative = -0.0550191
DICPCG: Solving for p, Initial residual = 0.168988, Final residual = 9.30204e-07, No Iterations 126
time step continuity errors : sum local = 0.00133669, global = 8.39336e-06, cumulative = -0.0550107
ExecutionTime = 37.44 s ClockTime = 37 s

Time = 0.75

Courant Number mean: 734.944 max: 59448.1
smoothSolver: Solving for Ux, Initial residual = 0.626513, Final residual = 0.0591268, No Iterations 1000
smoothSolver: Solving for Uy, Initial residual = 0.624025, Final residual = 0.00527135, No Iterations 1000
smoothSolver: Solving for Uz, Initial residual = 0.635244, Final residual = 0.312497, No Iterations 1000
DICPCG: Solving for p, Initial residual = 0.981377, Final residual = 0.0478388, No Iterations 51
time step continuity errors : sum local = 727.937, global = 1.48593, cumulative = 1.43092
DICPCG: Solving for p, Initial residual = 0.171069, Final residual = 9.38289e-07, No Iterations 124
time step continuity errors : sum local = 0.260373, global = -0.00256976, cumulative = 1.42835
ExecutionTime = 66.68 s ClockTime = 67 s

Time = 1

Courant Number mean: 365109 max: 2.20086e+07
#0 Foam::error:rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??:?
#4 Foam::symGaussSeidelSmoother::smooth(Foam::Field<d ouble>&, Foam::Field<double> const&, unsigned char, int) const at ??:?
#5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#6 ? in "/opt/openfoam5/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#7 ? in "/opt/openfoam5/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#8 ? in "/opt/openfoam5/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#9 ? in "/opt/openfoam5/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#11 ? in "/opt/openfoam5/platforms/linux64GccDPInt32Opt/bin/icoFoam"
Floating point exception (core dumped)
itachi 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



All times are GMT -4. The time now is 01:04.