[harshchandak97]

Hi, I am Harsh. I am trying to simulate flow of a non-newtonian liquid through a cylindrical pipe. I am using incompressible nonNewtonianIcofoam for simulation.
I need to vary the grid-size for my project. My initial grid-size was 3-3-15. It was working fine. When i change my grid-size in the z-direction it works perfectly fine but when i increase the grid-size in x-y direction the simulation blows off. The courant numbers and the error both become very high. Presently i am working with grid-size 4-4-20. I want my simulation to run even at large grid-size.
Thanking you in advance!!

I am attaching my complete file (3dpipe) and the error is given below :
https://www.dropbox.com/s/da37gg3i30...dpipe.zip?dl=0

//--------------------------------------Error--------------------------------------//

Time = 0.0925

Courant Number mean: 55399 max: 238907
smoothSolver: Solving for Ux, Initial residual = 0.590308, Final residual = 9.15232e-06, No Iterations 44
smoothSolver: Solving for Uy, Initial residual = 0.587772, Final residual = 8.62439e-06, No Iterations 43
smoothSolver: Solving for Uz, Initial residual = 0.640244, Final residual = 9.91656e-06, No Iterations 65
GAMG: Solving for p, Initial residual = 0.972203, Final residual = 0.0808994, No Iterations 4
time step continuity errors : sum local = 11878.7, global = -199.333, cumulative = -438.136
GAMG: Solving for p, Initial residual = 0.245253, Final residual = 0.0200344, No Iterations 4
time step continuity errors : sum local = 3288.7, global = 111.832, cumulative = -326.304
GAMG: Solving for p, Initial residual = 0.230399, Final residual = 0.0135581, No Iterations 5
time step continuity errors : sum local = 1711.21, global = -67.7722, cumulative = -394.076
GAMG: Solving for p, Initial residual = 0.172112, Final residual = 0.00807115, No Iterations 5
time step continuity errors : sum local = 777.685, global = -31.6949, cumulative = -425.771
GAMG: Solving for p, Initial residual = 0.19576, Final residual = 5.14822e-07, No Iterations 17
time step continuity errors : sum local = 0.0365452, global = -0.000532092, cumulative = -425.772
ExecutionTime = 1.68 s ClockTime = 2 s

Time = 0.095

Courant Number mean: 87107.2 max: 564406
#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::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#4 ? at ??:?
#5 ? at ??:?
#6 ? at ??:?
#7 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#8 ? at ??:?
Floating point exception (core dumped)

//---------------------------------------------------------------------------------//