Learning Forum

[pmeghana]

I am trying to simulate a steady state case of a settling chamber using DPM in fluent with a certain inlet water flow rate and I am injecting a surface type with a rosin rammler particle distribution. For my case, i have got 15 diameters and 80 cells in the inlet, hence the number of parcels tracked is showing me 1200. There is a certain amount of particles leaving the chamber through an outlet.nI input a certain certain amount of particle flowrate (kg/s) and i track the amount leaving my chamber domain. But i want to know the exact number of particles in the system. through my inlet distribution i can find out the input number of particles, but how do i find out the output one?nI am able to check out which of the parcels and the overall mass that escaped through my outlet. How do i find out the distribution of particles and the count in these parcels?n

[Karthik Remella]

Hi,nYou should be able to obtain this number based on Particle ID or you might have to do Sampling. nHere is some help on Data Sampling from the Fluent Users Guide.nI hope this helps.n

[pmeghana]

HinThankyou, but i could not find the DPM variables in the sampling option int he run calculation tab. nInstead i took results>discrete phase>sample and got the data from that. The particle ID here would be the parcel ID right? n( x y z u v w diameter t mass-flow mass frequency time name)nHere for a steady state calculations, would the frequency give me the number of particles in the parcel at a certain x,y,z?nThankyou!nn

[Rob]

Particle ID is the parcel, it's just a badly chosen term from the early versions of the code that tends to cause confusion as we track parcels rather than particles. Not sure about frequency, what values are you seeing? n

[pmeghana]

Thank you sir. My values are like the below:n( x y z u v w diameter t mass-flow mass frequency time name)n(( 1.0000e+01 9.2038e-01 8.9226e-01 3.0359e-05 1.9501e-05 -4.1512e-06 1.0000e-06 3.0000e+02 1.1971e-05 7.8540e-16 1.5242e+10 2.2184e+06) injection-0:615)nMultiplying mass and frequency gives me mass-flow value, does this mean frequency can be taken as particle per time? or is it something else?.