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The expansion/contraction behavior of laminar liquid jets
Author(s) -
Oliver D. R.
Publication year - 1966
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.5450440209
Subject(s) - laminar flow , mechanics , reynolds number , newtonian fluid , contraction (grammar) , surface tension , thrust , viscoelasticity , jet (fluid) , thermodynamics , materials science , chemistry , physics , turbulence , medicine
An apparatus for measuring the thrust of liquid jets is described and the effect of surface tension on jet thrust discussed in detail. Whether the liquids used are nominally “Newtonian” or “viscoelastic”, there is a consistent trend in the expansion‐contraction behaviour. This is explained on the grounds that the fluids, from ethyl alcohol and glycerol on the one hand to poly (ethylene oxide) solutions on the other, possess appreciable elastic properties. Thrust measurements using short capillaries support this contention. At very low Reynolds numbers the jet thrusts are unusually high; it is suggested that this results from a purelyviscous phenomenon.