[flowris]

Hello,


I am currently trying the InterFoam tutorial, written by Hassan Hemida, which can be found at http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2007/. I think this tutorial has been written for an older version of interFoam. The laminar case was easily runned, but for the RAS case, I needed to change quite a lot of the files. The files I downloaded were written for reasInterFoam, while in OpenFOAM-1.6, RAS simulation is integrated in the normal interFoam solver.

The case I set up was more or less a mixture between the original files from Mr. Hemida and the RAS damBreak tutorial.

When running the case, I received time step continuity errors in the first time step. My log file looks like this:


Create time

Create mesh for time = 0


Reading g
Reading field p

Reading field alpha1

Reading field U

Reading/calculating face flux field phi

Reading transportProperties

Selecting incompressible transport model Newtonian
Selecting incompressible transport model Newtonian
Selecting turbulence model type RASModel
Selecting RAS turbulence model kEpsilon
kEpsilonCoeffs
{
Cmu 0.09;
C1 1.44;
C2 1.92;
sigmaEps 1.3;
}

time step continuity errors : sum local = 9.77995e-06, global = -9.77995e-06, cumulative = -9.77995e-06
DICPCG: Solving for pcorr, Initial residual = 1, Final residual = 7.62511e-09, No Iterations 178
DICPCG: Solving for pcorr, Initial residual = 4.89025e-10, Final residual = 4.89025e-10, No Iterations 0
time step continuity errors : sum local = 7.45727e-14, global = -9.41208e-16, cumulative = -9.77995e-06
Courant Number mean: 0.000122101 max: 0.0277845

Starting time loop

Courant Number mean: 0.000878914 max: 0.2
deltaT = 0.000719825
Time = 0.000719825

MULES: Solving for alpha1
Liquid phase volume fraction = 0.0220225 Min(alpha1) = 0 Max(alpha1) = 1
MULES: Solving for alpha1
Liquid phase volume fraction = 0.0220401 Min(alpha1) = 0 Max(alpha1) = 1
MULES: Solving for alpha1
Liquid phase volume fraction = 0.0220577 Min(alpha1) = 0 Max(alpha1) = 1
MULES: Solving for alpha1
Liquid phase volume fraction = 0.0220753 Min(alpha1) = 0 Max(alpha1) = 1
DICPCG: Solving for p, Initial residual = 1, Final residual = 0.00876324, No Iterations 94
DICPCG: Solving for p, Initial residual = 3.10228e-06, Final residual = 2.79213e-08, No Iterations 40
DICPCG: Solving for p, Initial residual = 0.000594512, Final residual = 5.7006e-06, No Iterations 92
DICPCG: Solving for p, Initial residual = 3.78488e-05, Final residual = 3.60187e-07, No Iterations 42
DICPCG: Solving for p, Initial residual = 0.00218362, Final residual = 1.99928e-05, No Iterations 86
DICPCG: Solving for p, Initial residual = 3.32376e-05, Final residual = 3.11412e-07, No Iterations 37
DICPCG: Solving for p, Initial residual = 0.00169515, Final residual = 1.46306e-05, No Iterations 82
DICPCG: Solving for p, Initial residual = 1.52903e-05, Final residual = 9.49297e-08, No Iterations 84
time step continuity errors : sum local = 2.1649e-09, global = 9.53018e-12, cumulative = -9.77994e-06



Can anyone help? (I am am not sure that I really understand what a time step continuity error means)