simpleFOAM (RANS) - internal pipe flow - 'k'
1 Attachment(s)
Hello,
First, I'm using OpenFOAM 5.0 (RANS - realizebleKE):
Re=5300 (R = 0,00635 - L=4D)
BC:
Quote:
pipe_wall
epsilon
internalField uniform 0.00952;
{
type epsilonWallFunction;
value uniform 0.00952;
}
k
internalField uniform 4.5e-3;
{
type fixedValue;
value uniform 1e-15;
}
OBS: Using kLowReWallFunction I'm having the same problem.
nut
internalField uniform 0;
{
type calculated;
value uniform 0;
}
p
internalField uniform 0;
{
type zeroGradient;
}
U
internalField uniform (1 0 0);
{
type fixedValue;
value uniform (0 0 0);
}
cyclic domain
log:
...
Time = 1500
smoothSolver: Solving for Ux, Initial residual = 8.14155e-05, Final residual = 7.41441e-06, No Iterations 3
smoothSolver: Solving for Uy, Initial residual = 7.04818e-05, Final residual = 3.22128e-06, No Iterations 3
smoothSolver: Solving for Uz, Initial residual = 5.7334e-05, Final residual = 3.25325e-06, No Iterations 3
Pressure gradient source: uncorrected Ubar = 0.999999, pressure gradient = 1.05028
GAMG: Solving for p, Initial residual = 0.000159464, Final residual = 1.44095e-06, No Iterations 2
time step continuity errors : sum local = 1.32913e-07, global = -2.98883e-10, cumulative = -4.11386e-07
Pressure gradient source: uncorrected Ubar = 1, pressure gradient = 1.04501
smoothSolver: Solving for epsilon, Initial residual = 5.50983e-05, Final residual = 4.04455e-06, No Iterations 2
smoothSolver: Solving for k, Initial residual = 5.71171e-08, Final residual = 5.71171e-08, No Iterations 0
ExecutionTime = 1851.33 s ClockTime = 2205 s
yPlus yPlus write:
writing object yPlus
patch pipe y+ : min = 0.973688, max = 1.13078, average = 1.06766
|
I started a simulation using the realizableKE model in order to compare it to my kOmegaSST simulation (whose convergence). I noticed that when starting the simulation, the values of 'k' assume the following pattern (attached image), could someone advise me on what to do in relation? |
