[jimteb]

Hi Foamers,

Has anyone attempted to run the oscillatingInletACMI2D tutorial case using a compressible flow solver, e.g. rhoPimpleDyMFoam?

I am able to match the incompressible results fairly well when looking in paraView, however I am getting very large time step continuity errors, for both local, global and cumulative error. I have tried messing around with boundary conditions, discretisation schemes, etc., with no success.

Here is an excerpt from the run log:

solidBodyMotionFunctions::oscillatingLinearMotion::transformation(): Time = 1.34375 transformation: ((-0 -0.440455 -0) (1 (0 0 0)))
AMI: Creating addressing and weights between 40 source faces and 96 target faces
AMI: Patch source sum(weights) min/max/average = 0, 1, 0.648862
AMI: Patch target sum(weights) min/max/average = 0, 1, 0.259544
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
rhoEqn max/min : 1.00876 1e-06
PIMPLE: iteration 1
smoothSolver:  Solving for e, Initial residual = 0.000354663, Final residual = 8.46498e-07, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.0549391, Final residual = 8.04382e-06, No Iterations 18
GAMG:  Solving for p, Initial residual = 7.69576e-06, Final residual = 7.69576e-06, No Iterations 0
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 0.999997, global = 0.999997, cumulative = 3112.9
rho max/min : 1 1
GAMG:  Solving for p, Initial residual = 0.0231104, Final residual = 8.37962e-06, No Iterations 16
GAMG:  Solving for p, Initial residual = 8.20122e-06, Final residual = 8.20122e-06, No Iterations 0
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 0.999997, global = 0.999997, cumulative = 3113.9
rho max/min : 1 1
PIMPLE: iteration 2
smoothSolver:  Solving for e, Initial residual = 0.000157866, Final residual = 4.39831e-07, No Iterations 2
GAMG:  Solving for p, Initial residual = 0.0215709, Final residual = 7.47359e-06, No Iterations 11
GAMG:  Solving for p, Initial residual = 7.48215e-06, Final residual = 7.48215e-06, No Iterations 0
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 0.999997, global = 0.999997, cumulative = 3114.9
rho max/min : 1 1
GAMG:  Solving for p, Initial residual = 0.0102435, Final residual = 7.53471e-06, No Iterations 14
GAMG:  Solving for p, Initial residual = 7.5762e-06, Final residual = 8.22582e-07, No Iterations 5
diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 0.999997, global = 0.999997, cumulative = 3115.9
rho max/min : 1 1
smoothSolver:  Solving for epsilon, Initial residual = 0.00113894, Final residual = 1.12523e-07, No Iterations 3
smoothSolver:  Solving for k, Initial residual = 0.00123162, Final residual = 3.2464e-07, No Iterations 3
PIMPLE: converged in 2 iterations
ExecutionTime = 198.06 s  ClockTime = 198 s

Courant Number mean: 0.0944925 max: 0.495629
deltaT = 0.00208333
Time = 1.34583

Does anyone have any ideas how to get the time step error down? I would appreciate any help, thanks.