[senthilathiban]

Hi all,

I am trying to study the movement of particles inside a wind tunnel. My kinematicCloudProperties looks as follows.

injectionModels
    {
	model1
	{
            type             manualInjection;
            positionsFile   "kinematicCloudPositions";
            duration         1000;
	    parcelsPerSecond 100;
            massTotal        0;
            parcelBasisType  fixed;
            flowRateProfile  constant 1;
            nParticle        10;
            SOI              1;
            U0               (0 0 0);

            sizeDistribution
            {
                type        fixedValue;
                fixedValueDistribution
                {
                    value   0.0000025;
                }
            }
        }
    }

But during simulation, the particles are released only once during the start of the simulation. I want the particles to be inserted continuously each and every second of the simulation.

What should I change in the code.

Can anyone please help.

[amuzeshi]

Originally Posted by senthilathiban

Hi all,

I am trying to study the movement of particles inside a wind tunnel. My kinematicCloudProperties looks as follows.

injectionModels
    {
    model1
    {
            type             manualInjection;
            positionsFile   "kinematicCloudPositions";
            duration         1000;
        parcelsPerSecond 100;
            massTotal        0;
            parcelBasisType  fixed;
            flowRateProfile  constant 1;
            nParticle        10;
            SOI              1;
            U0               (0 0 0);

            sizeDistribution
            {
                type        fixedValue;
                fixedValueDistribution
                {
                    value   0.0000025;
                }
            }
        }
    }

But during simulation, the particles are released only once during the start of the simulation. I want the particles to be inserted continuously each and every second of the simulation.

What should I change in the code.

Can anyone please help.

Hi
I myself, prefer kinematicLookupTableInjection instead of manualInjection.
It handles what u want; It also needs one more file named parcelInjectionProperties in constant directory that comes in the following.
The following files are my setting for 8 injectors aligned in z direction:



kinematicCloudProperties:

injectionModels
 {
model1
{
massFlowRate        .0001;
 type            kinematicLookupTableInjection;
             massTotal       0;
             parcelBasisType fixed;
 nParticle    1;
             SOI             .25;
             inputFile       "parcelInjectionProperties";
             duration        .25;
             parcelsPerSecond 1000;
             randomise      on;
         }
     }

parcelInjectionProperties (mDot entry is of no importance.) :

                         
 FoamFile
 
 {
 
     version     2.0;
     format      ascii;
     class       dictionary;
     location    "constant";
     object      scalarListList;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 // (x y z) (u v w) d(diameter) rho(particle) mDot
 (
 
 
 (    0    0    0.003125    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    1
 (    0    0    0.009375    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    2
 (    0    0    0.015625    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    3
 (    0    0    0.021875    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    4
 (    0    0    0.028125    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    5
 (    0    0    0.034375    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    6
 (    0    0    0.040625    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //    7
 (    0    0    0.046875    )    (    0    0    0    )    1.75E-005    2526    1.00E-007    //
 );

regards
Ali

[senthilathiban]

Hi Ali, I have used this kinematic lookup table and the problem now is, the simulation suddenly stops and shows no error.

the last line in the terminal is

''solving kinematic cloud''

and there is no error, it doesn't stop. it's just stuck at this point.

do you have any idea, why this happens.

thanks,
Senthil.

[johanning]

senthilathiban do you habe a solution for your problem? because I have now the same problem and no idea.

[senthilathiban]

There were problems when you run in parallel with openfoam 4. The kinematiccloud was not able to transfer data within processors.

I upgraded to openfoam 5 and then it worked fine.

[johanning]

okay that's sounds easy. I try to do the same but there is no positive result. First when I used the patch injection the simulation worked. Now I'm using kinematicLookUpTableInjection and I have the problem. Maybe someone has an idea?