[Desimuser1]

I was using MPPICFoam, with injectionChannel as the base case, i am getting error in the kinematicCloudProperties

# UBUNTU TERMINAL #
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2212 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : _66908158ae-20221220 OPENFOAM=2212 version=v2212
Arch : "LSB;label=32;scalar=64"
Exec : MPPICFoam -parallel
Date : May 25 2023
Time : 14:24:15
Host : desim1
PID : 189278
I/O : uncollated
Case : /home/desim1/OpenFOAM/desim1-10/run/sir3_v2212_injectionChannel/injectionChannel1_desim
nProcs : 12
Hosts :
(
(desim1 12)
)
Pstream initialized with:
floatTransfer : 0
nProcsSimpleSum : 0
commsType : nonBlocking
polling iterations : 0
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0


PIMPLE: Operating solver in PISO mode


Reading g
Reading field U

Reading field p

Reading/calculating continuous-phase face flux field phic

Creating turbulence model

Selecting incompressible transport model Newtonian
Creating field alphac

Constructing kinematicCloud kinematicCloud
Constructing particle forces
Selecting particle force WenYuDrag
Constructing cloud functions
none
Constructing particle injection models
Creating injector: model1
Selecting injection model patchInjection
Constructing 3-D injection
Choosing nParticle to be a fixed value, massTotal variable now does not determine anything.
Selecting distribution model normal
Selecting dispersion model none
Selecting patch interaction model localInteraction
[0] [4]
[4]
[4] [7]
[7]
[7] --> FOAM FATAL IO ERROR: (openfoam-2212[8]
[8]
[8] --> FOAM FATAL IO ERROR: (openfoam-2212)
[8] Attempt to return dictionary entry as a primitive
[8]
[8] file: stream.subModels.localInteractionCoeffs.patches at line 0.[9]
[9] // the error continues

# kinematicCloudProperties FILE #

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2212 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object kinematicCloudProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

solution
{
active true;
coupled true;
transient yes;
cellValueSourceCorrection on;

interpolationSchemes
{
rho.air cell;
U.air cellPoint;
mu.air cell;
}

averagingMethod basic;

integrationSchemes
{
U Euler;
}

sourceTerms
{
schemes
{
U semiImplicit 1;
}
}
}

constantProperties
{
rho0 1604;

alphaMax 0.9;
}

subModels
{

particleForces
{
WenYuDrag
{
alphac alpha.air;
}
}

injectionModels
{
model1
{
type patchInjection;
parcelBasisType fixed;
patch "INLET";
U0 (0 40 0);
nParticle 1;
parcelsPerSecond 1390885;
sizeDistribution
{
type normal;
normalDistribution
{
mu 650e-6;
sigma 25e-6;
minValue 500e-6;
maxValue 800e-6;
}
}
flowRateProfile constant 1;
massTotal 0.002;
SOI 1;
duration 60;
}
};

dispersionModel none;

patchInteractionModel localInteraction;

localInteractionCoeffs
{
type patchInjection;

patches
{
patch "OUTER_WALL|INNER_WALL|DUST_OUT|INLET"
{
type rebound;
e 1;
mu 0;
};

patch "OUTLET_AIR"
{
type escape;
};
}

};


/*
massTotal 0.002;
SOI 1;
parcelBasisType fixed;
nParticle 1;
flowRateProfile constant 1;
*/
surfaceFilmModel none;

packingModel none;

dampingModel relaxation;

relaxationCoeffs
{
timeScaleModel
{
type nonEquilibrium;
alphaPacked 0.58;
e 0.9;
}
}

isotropyModel stochastic;

stochasticCoeffs
{
timeScaleModel
{
type isotropic;
alphaPacked 0.58;
e 0.9;
}
}

stochasticCollisionModel none;
}

cloudFunctions
{}

I WAS TRYING TO SIMULATE CYCLONE SEPERATOR WITH AIR AND SAND
can someone please point out the error

[Yann]

Hello,

This syntax is wrong:

localInteractionCoeffs
{
	type patchInjection;
	patches
	{
		patch "OUTER_WALL|INNER_WALL|DUST_OUT|INLET"
		{
			type rebound;
			e 1;
			mu 0;
		};

		patch "OUTLET_AIR"
		{
			type escape;
		};
	}
};

It should be:

    localInteractionCoeffs
    {
        patches
        (
            "(OUTER_WALL|INNER_WALL|DUST_OUT|INLET)"
            {
                type rebound;
                e    1;
                mu   0;
            }
            OUTLET_AIR
            {
                type escape;
            }
        );
    }

Have a look at the tutorials to have examples of proper syntax: https://develop.openfoam.com/Develop...loudProperties

Also your message is pretty hard to read, please put some effort into your message formatting (for instance using [CODE] tags for files and logs snippets)

Regards,
Yann

[Desimuser1]

thank you yann, i will look into it

[Desimuser1]

thanks yann it worked,

i am trying to simulate a swirl tube, but since swirl tubes are very small i cannot simulate in MPPIC foam, i am getting convergence, but as soon as particle injects, courant number blows up to 10e+42, any way i can scale down the tutorial,

any advice on scaling the MPPICFoam