simpleFoam for kEpsilon 2D airfoil (blowing up..).
 

20, No Iterations 0
time step continuity errors : sum local = 5.05504e+15, global = 0.0217413, cumulative = 0.0228677
smoothSolver: Solving for epsilon, Initial residual = 5.02539e-31, Final residual = 5.02539e-31, No Iterations 0
smoothSolver: Solving for k, Initial residual = 0.511106, Final residual = 0.0181972, No Iterations 2
ExecutionTime = 22.52 s ClockTime = 23 s

Time = 16

smoothSolver: Solving for Ux, Initial residual = 0.548209, Final residual = 0.0378744, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.657187, Final residual = 0.0472878, No Iterations 2
GAMG: Solving for p, Initial residual = 9.27084e-14, Final residual = 9.27084e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 9.27084e-14, Final residual = 9.27084e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 9.27084e-14, Final residual = 9.27084e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 9.27084e-14, Final residual = 9.27084e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 9.27084e-14, Final residual = 9.27084e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 9.27084e-14, Final residual = 9.27084e-14, No Iterations 0
time step continuity errors : sum local = 2.48378e+20, global = 7133.3, cumulative = 7133.32
smoothSolver: Solving for epsilon, Initial residual = 5.30678e-24, Final residual = 5.30678e-24, No Iterations 0
smoothSolver: Solving for k, Initial residual = 0.0142531, Final residual = 0.000883614, No Iterations 2
bounding k, min: -4.46816e+29 max: 5.01191e+45 average: 4.17184e+41
ExecutionTime = 22.58 s ClockTime = 23 s

Time = 17

smoothSolver: Solving for Ux, Initial residual = 0.602631, Final residual = 0.046969, No Iterations 2
smoothSolver: Solving for Uy, Initial residual = 0.686435, Final residual = 0.047856, No Iterations 2
GAMG: Solving for p, Initial residual = 1.5226e-12, Final residual = 1.5226e-12, No Iterations 0
GAMG: Solving for p, Initial residual = 1.5226e-12, Final residual = 1.5226e-12, No Iterations 0
GAMG: Solving for p, Initial residual = 1.5226e-12, Final residual = 1.5226e-12, No Iterations 0
GAMG: Solving for p, Initial residual = 1.5226e-12, Final residual = 1.5226e-12, No Iterations 0
GAMG: Solving for p, Initial residual = 1.5226e-12, Final residual = 1.5226e-12, No Iterations 0
GAMG: Solving for p, Initial residual = 1.5226e-12, Final residual = 1.5226e-12, No Iterations 0
time step continuity errors : sum local = 3.75735e+20, global = 30482.7, cumulative = 37616
smoothSolver: Solving for epsilon, Initial residual = 2.15223e-27, Final residual = 2.15223e-27, No Iterations 0
smoothSolver: Solving for k, Initial residual = 0.450582, Final residual = 0.0255508, No Iterations 2
ExecutionTime = 22.66 s ClockTime = 23 s

Time = 18

smoothSolver: Solving for Ux, Initial residual = 0.42828, Final residual = 0.022633, No Iterations 3
smoothSolver: Solving for Uy, Initial residual = 0.431794, Final residual = 0.0276397, No Iterations 3
GAMG: Solving for p, Initial residual = 2.39554e-05, Final residual = 1.09496e+38, No Iterations 2000
GAMG: Solving for p, Initial residual = 0.00023719, Final residual = 1.15371e+38, No Iterations 2000
GAMG: Solving for p, Initial residual = 2.35836e-06, Final residual = 2.12539e-08, No Iterations 196
#0 Foam::error::printStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 double Foam::sumProd<double>(Foam::UList<double> const&, Foam::UList<double> const&) at ??:?
#4 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#5 Foam::GAMGSolver::solveCoarsestLevel(Foam::Field<d ouble>&, Foam::Field<double> const&) const at ??:?
#6 Foam::GAMGSolver::Vcycle(Foam::PtrList<Foam::lduMa trix::smoother> const&, Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const at ??:?
#7 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#8 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
#9 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??:?
#10 Foam::fvMatrix<double>::solve() at ??:?
#11 ? at ??:?
#12 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#13 ? at ??:?
부동 소수점 예외 (core dumped)


when I did simpleFoam kEpsilon, the error occurred... I don't know how to solve it -.-

Here are my 0 and system folder and give me advices..

thanks

Hey blue

Can you upload the whole .log file of your simulation please? And possibly upload the whole case including the /constant folder (if it is not too big) on a link (i.e. dropbox)

Kind regards

Dear jeytsav. I fixed this problem to change relaxation factor.

But I have questions. when i plotted Cp ( xFoil vs RAS solutions), I can saw big difference near x=0.2..

Is it mesh problem?? or schemes?

p.s) i don't have dropbox.. so i cannot upload /constant