[BSengupta]

Hi Foamers!


I am trying to simulate a rotating wing with a fixed rpm. Schematic of my problem is attached.


When I am trying to run the simulation, it giving negative time.

Create time

Create dynamic mesh for time = 0

Selecting dynamicFvMesh turboFvMesh
Initializing the GGI interpolator between master/shadow patches: RotorGGI/StatorGGI
Turbomachine Mixer mesh:
    origin: (0 0 0)
    axis  : (0 0 1)
Reading thermophysical properties

Selecting thermodynamics package hPsiThermo<pureMixture<constTransport<specieThermo<hConstThermo<perfectGas>>>>>
Allocating field rho

Reading field U

Reading/calculating face flux field phi

Creating MRF model

Creating turbulence model

Selecting turbulence model type RASModel
Selecting RAS turbulence model laminar
Create Riemann solver

Allocating field rhoU

Allocating field rhoE

Allocating physDeltaT list for RK and Dual-Time Stepping

Creating oldTime fields for dual-time stepping


Starting time loop

Creating ggi check function object
Moving Cell Zone Name: cellRegion0 rpm: 1250
Moving Cell Zone Name: cellRegion1 rpm: 0
Moving Face Zone Name: RotorGGI_faces rpm: 1250

 Time = -0.0008517870533

diagonal:  Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
diagonal:  Solving for rhoUx, Initial residual = 0, Final residual = 0, No Iterations 0
diagonal:  Solving for rhoUy, Initial residual = 0, Final residual = 0, No Iterations 0
diagonal:  Solving for rhoUz, Initial residual = 0, Final residual = 0, No Iterations 0
diagonal:  Solving for rhoE, Initial residual = 0, Final residual = 0, No Iterations 0
bounding rho, min: -8002.780332 max: 1126.854835 average: 0.2519080825
new min: 0.8002967477
new max: 1.999596239
bounding rhoE, min: -2413391697 max: 338960313.3 average: -24780.12515
new min: 50034.0114
new max: 999650.5291
bounding U max: 16551.47357
bounding h, min: -710.4404189 max: 907465.0083 average: 306656.9902
new min: 10023.24515
bounding p, min: 2675.587422 max: 401158.8261 average: 104114.4592
new min: 10000.03539
rho L2 Residual: 4.806956853
 rho LInf Residual: 6.972972733

My boundary file is:
RotorGGI
{
type ggi;
nFaces 21232;
startFace 36777457;
rotationAxis (0 0 1);
nCopies 30;
shadowPatch StatorGGI;
zone RotorGGI_faces;
bridgeOverlap true;
}
blade
{
type wall;
nFaces 1135638;
startFace 36798689;
}
farfield
{
type patch;
nFaces 60000;
startFace 37934327;
}
StatorGGI
{
type ggi;
nFaces 38736;
startFace 37994327;
rotationAxis (0 0 1);
nCopies 30;
shadowPatch RotorGGI;
zone StatorGGI_faces;
bridgeOverlap true;
}


Have anyone encountered this kind of problem before. If anyone can give me a clue about this, I shall be really helped.

Thanks a lot for your time.