Alexvader 
October 4, 2011 19:21 
These are the first three iterations using icoLagrangianFoam, from a previously converged icoFoam case, using same time step, mesh, schemes and solution algorithms... :
Quote:
/**\
 =========  
 \\ / F ield  OpenFOAM: The Open Source CFD Toolbox 
 \\ / O peration  Version: 1.5dev 
 \\ / A nd  Revision: 1861 
 \\/ M anipulation  Web: http://www.OpenFOAM.org 
\**/
Exec : icoLagrangianFoam
Date : Oct 05 2011
Time : 00:14:02
Host : iskandhar
PID : 21050
Case : /home/alex/OpenFOAM/alex1.5dev/run/icoLagrangianFoam/BoxParticles4
nProcs : 1
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time
Create mesh for time = 0
Reading transportProperties
Reading field p
Reading field U
Reading/calculating face flux field phi
Reading environmentalProperties
Constructing kinematicCloud
> FOAM Warning :
From function Cloud<ParticleType>::initCloud(const bool checkClass)
in file /home/alex/OpenFOAM/OpenFOAM1.5dev/src/lagrangian/basic/lnInclude/CloudIO.C at line 51
Cannot read particle positions file
"/home/alex/OpenFOAM/alex1.5dev/run/icoLagrangianFoam/BoxParticles4/0/lagrangian/kinematicCloud"
assuming the initial cloud contains 0 particles.
Selecting DispersionModel NoDispersion
Selecting DragModel SphereDrag
Selecting InjectionModel ConeInjection
Selecting pdfType RosinRammler
Selecting WallInteractionModel StandardWallInteraction
Selecting U IntegrationScheme Euler
Starting time loop
Time = 0.0002
Courant Number mean: 4.23209e05 max: 0.104846 velocity magnitude: 1.11443
Evolving kinematicCloud
> Cloud: kinematicCloud
Added 20 new parcels
Cloud name: kinematicCloud
Parcels added during this run = 20
Mass introduced during this run = 6.66667e06
Current number of parcels = 20
Current mass in system = 6.66667e06
PBiCG: Solving for Ux, Initial residual = 0.000529261, Final residual = 5.48978e06, No Iterations 1
PBiCG: Solving for Uy, Initial residual = 0.00100107, Final residual = 1.01479e07, No Iterations 2
PBiCG: Solving for Uz, Initial residual = 0.00222116, Final residual = 2.36782e07, No Iterations 2
PCG: Solving for p, Initial residual = 0.0195505, Final residual = 9.85446e07, No Iterations 414
time step continuity errors : sum local = 1.7666e10, global = 4.41944e13, cumulative = 4.41944e13
PCG: Solving for p, Initial residual = 0.0173523, Final residual = 9.39649e07, No Iterations 401
time step continuity errors : sum local = 1.68072e10, global = 3.83983e13, cumulative = 8.25927e13
ExecutionTime = 30.61 s ClockTime = 31 s
MassFlows: auto8 = 4.32253e09 auto9 = 2.4648e09 auto11 = 9.71808e10
Time = 0.0004
Courant Number mean: 4.4404e05 max: 0.476931 velocity magnitude: 11.5557
Evolving kinematicCloud
> Cloud: kinematicCloud
Added 20 new parcels
Cloud name: kinematicCloud
Parcels added during this run = 40
Mass introduced during this run = 1.33333e05
Current number of parcels = 40
Current mass in system = 1.33333e05
PBiCG: Solving for Ux, Initial residual = 0.028415, Final residual = 6.92591e06, No Iterations 2
PBiCG: Solving for Uy, Initial residual = 0.0303066, Final residual = 4.55824e06, No Iterations 2
PBiCG: Solving for Uz, Initial residual = 0.0142992, Final residual = 5.03008e06, No Iterations 2
PCG: Solving for p, Initial residual = 0.0717523, Final residual = 9.43277e07, No Iterations 437
time step continuity errors : sum local = 1.76544e10, global = 1.3853e12, cumulative = 2.21123e12
PCG: Solving for p, Initial residual = 0.0541759, Final residual = 9.53082e07, No Iterations 416
time step continuity errors : sum local = 2.06811e10, global = 7.72575e13, cumulative = 2.9838e12
ExecutionTime = 58.33 s ClockTime = 59 s
MassFlows: auto8 = 5.09844e09 auto9 = 2.40789e09 auto11 = 9.08051e10
Time = 0.0006
Courant Number mean: 4.77038e05 max: 0.932049 velocity magnitude: 27.89
Evolving kinematicCloud
> Cloud: kinematicCloud
Added 20 new parcels
Cloud name: kinematicCloud
Parcels added during this run = 60
Mass introduced during this run = 2e05
Current number of parcels = 60
Current mass in system = 2e05
PBiCG: Solving for Ux, Initial residual = 0.109319, Final residual = 9.01888e07, No Iterations 3
PBiCG: Solving for Uy, Initial residual = 0.111, Final residual = 8.75318e07, No Iterations 3
PBiCG: Solving for Uz, Initial residual = 0.0742368, Final residual = 8.70986e07, No Iterations 3
PCG: Solving for p, Initial residual = 0.391891, Final residual = 9.77096e07, No Iterations 448
time step continuity errors : sum local = 3.12159e10, global = 1.4262e12, cumulative = 1.55761e12
PCG: Solving for p, Initial residual = 0.228785, Final residual = 9.49803e07, No Iterations 436
time step continuity errors : sum local = 3.2702e10, global = 1.93379e12, cumulative = 3.4914e12
ExecutionTime = 87.46 s ClockTime = 88 s
MassFlows: auto8 = 7.97621e09 auto9 = 2.55651e09 auto11 = 9.58026e10
Time = 0.0008
Courant Number mean: 8.0158e05 max: 6.90053 velocity magnitude: 139.132
Evolving kinematicCloud
> Cloud: kinematicCloud
Added 20 new parcels
Cloud name: kinematicCloud
Parcels added during this run = 80
Mass introduced during this run = 2.66667e05
Current number of parcels = 47
Current mass in system = 1.56667e05
PBiCG: Solving for Ux, Initial residual = 0.491305, Final residual = 3.60123e06, No Iterations 7
PBiCG: Solving for Uy, Initial residual = 0.435496, Final residual = 2.98495e06, No Iterations 7
PBiCG: Solving for Uz, Initial residual = 0.398934, Final residual = 5.11571e06, No Iterations 7

It can clearly be seen that Co is getting higher and higher... and what's worse is that i have adjustable time step in my controlDict :
Quote:
/**\
 =========  
 \\ / F ield  OpenFOAM: The Open Source CFD Toolbox 
 \\ / O peration  Version: 1.2 
 \\ / A nd  Web: http://www.openfoam.org 
 \\/ M anipulation  
\**/
// FoamX Case Dictionary.
FoamFile
{
version 2.0;
format ascii;
root "/home/coyote/hjasak/OpenFOAM/hjasak1.2/run/test";
case "cavity";
instance "system";
local "";
class dictionary;
object controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
application icoLagrangianFoam;
startFrom latestTime;
startTime 0;
stopAt endTime;
endTime 1.5;
deltaT 0.0002;
writeControl timeStep;
writeInterval 20;
purgeWrite 0;
writeFormat ascii;
writePrecision 6;
writeCompression uncompressed;
timeFormat general;
timePrecision 6;
graphFormat raw;
runTimeModifiable yes;
adjustTimeStep yes;
maxCo 0.5;
maxDeltaT 0.0002;
functions
(
massFlow
{
type patchMassFlow;
functionObjectLibs
(
"libsimpleFunctionObjects.so"
);
verbose true;
patches
(
auto8
auto9
auto11
);
factor 1;
}
);

What can i do here...?
