Number of particles in a cellZone
 

Hi all,

I am dealing with a problem in which I want to count number of current particles inside a cellZone. Adding particles to the domain, terminal shows the number of current particles in the whole region. However I want to know this on a particular cellZone that I may have defined before.

Any suggestions?

Thanks in advance.

Hello Mojtaba,

I am using lagrangian solver to inject particles into fluid.

I am trying to create cellZoneInjection. But, I am getting some errors in the creation of injection model.

If you are also working on the similar problem, may I request you to help me in solving this.

Thanks in advance.

Regards,
Vidyadhar

Hello Vidyadhar,

How can I help you? What is the error?

Thank you for the reply Mojtaba.

I am using vofLPTSolver of Caelus(caelus is similar to openFoam).
The error is highlighted in red:

Part-Output of the log file
Constructing particle injection models
Creating injector: model3
Selecting injection model cellZoneInjection
Constructing 3-D injection
Selecting distribution model fixedValue
cell zone size = 3610
cell zone volume = 6.041191959e-09
--> CAELUS Warning :
From function CML::CellZoneInjection<CloudType>::updateMesh()
in file lagrangian/intermediate/lnInclude/CellZoneInjection.hpp at line 397
Number of particles to be added to cellZone particle_INLET1 is zero


The injection model in my particle Cloud properties file is like below:

model3
{
type cellZoneInjection;
cellZone particle_INLET1;
SOI 0.0112; // Start Of Injection
flowRateProfile constant 1; // Flow rate profile relative to SOI

massTotal 3.4746e-08; // Total mass injected over injection duration
parcelBasisType mass; // How are the number of particles calculated
duration 1.2; // Duration of injection. NOTE: set to 1 for steady state
U0 (0 0 0.04175); // Initial parcel velocity

numberDensity 500; //Number density of particles in cell set (effective)
nParticles 500; //I am trying these options to check if particles are getting injected or not
nparcels 500; //I am trying these options to check if particles are getting injected or not


sizeDistribution
{
type fixedValue;
fixedValueDistribution
{
value 0.48e-03;
}
}
}

I have used toposetDict to create the cellZone:
actions
(

{
name particle_INLET1cellSet;
type cellSet;
action new;
source boxToCell;
sourceInfo
{
box (-0.0036 0.0012 -0.0125)(-0.0012 0.0036 -0.0115);
}
}

{
name particle_INLET1;
type cellZoneSet;
action new;
source setToCellZone;
sourceInfo
{
set particle_INLET1cellSet;
}
}


Probably, I am missing some keyword(for adding no.of particles to the cellZone) in the injection model. I need help there.


Regards,
vidyadhar

Hello Mojtaba,

To add to the previous reply:

Simulation is not getting stopped. Only problem is that particles are not getting added.

Regards,
vidyadhar

cellZoneinjection problem
 

Hello vidyadhar
I am using lagrangian solver to inject particles into fluid. I am trying to create cellZoneInjection (cellZone made by topoSetDict) for InjectModel in kinematicCloudProperties.

If you were also working on the similar problem, may I request you to help me in solving this. Simulation is running but the problem is that the particles are not adding to the model.


injectionModels // Setup of the particle injection
{
model1
{
type cellZoneInjection;
cellZone particle_Inlet;
duration 1; // Total duration of particle injection
massTotal 0.018; //kg
parcelBasisType mass;
flowRateProfile constant 1;
numberDensity 500; //Number density of particles in cell set (effective)
nParticle 1; // Number of particles per parcel
SOI 0.2;//2; // Start-of-injection time (SOI)
U0 (0.05 0 0); // Initial parcel/particle velocity (U 0 )
sizeDistribution //Size distribution model (normal size distribution, ...)
{
type fixedValue;
fixedValueDistribution
{
value 0.0007;
}
}
}
}


Thanks

Regards,
pouneh

Did you find the solution for the number of particles inside a user-defined cellzone?