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Particle effects on free jet entrainment
Author(s) -
Tatterson D. F.,
Marker T. L.,
Forgac J. M.
Publication year - 1987
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450650302
Subject(s) - entrainment (biomusicology) , mechanics , jet (fluid) , nozzle , particle (ecology) , physics , thermodynamics , geology , rhythm , acoustics , oceanography
The effect of particles on entrainment into free jets has been reexamined. As previously reported, particles can increase, decrease or have no effect on jet entrainment. This study suggests that the effect correlates with the ratio of particle stopping distance to nozzle diameter. For values of this ratio less than 3 entrainment increases due to the presence of particles. For values of the ratio between 3 and 65, entrainment is decreased. For values greater than 65, the presence of particles in the jet has no effect on entrainment. If the suggested correlation proves to be correct, it will assist the design engineer who wishes to rapidly mix particles with surrounding gas in a free jet. In particular, the region where a decrease in entrainment is observed should be avoided as there will be a corresponding decrease in mass and heat transfer.