Abstract
Volume ratios of the residual and detached parts of drops, determined experimentally are compared with those predicted theoretically by Lohnstein.
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Abbreviations
- a :
-
capillary constant \(\left( {\frac{{2\sigma }}{{\Delta \rho g}}} \right)^{\tfrac{1}{2}}\)
- b :
-
radius of curvature at the apex of a pendant drop
- B :
-
function defined in the text H/(H+H R)
- d :
-
outside nozzle diameter
- d i :
-
inside nozzle diameter 2r
- e :
-
dimension defined in Fig. 2
- d e :
-
maximum horizontal diameter of a pendant drop
- f :
-
term defined by (10)
- g :
-
acceleration due to gravity
- h :
-
height of the head of attached liquid defined in Fig. 3
- H :
-
Harkins-Brown correction factor
- H R :
-
function defined in (7)
- L :
-
length of nozzle
- R 0 :
-
radius of curvature at the tip of the nozzle
- t F :
-
time of drop formation
- V :
-
volume of pendant drop
- \(\dot V\) :
-
volume flow rate at nozzle
- V M :
-
volume of maximum pendant drop
- V F :
-
volume of detached drop
- V R :
-
volume of residual drop
- X :
-
term defined by (6)
- σ :
-
interfacial tension
- μ D, C :
-
viscosity of dispersed or continuous phase, respectively
- ρ D :
-
density of dispersed phase
- Δρ :
-
difference in densities of both phases
- ϕ :
-
angle between the tangent of drop contour and the horizontal plane at the tip of the nozzle
References
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Vacek, V., Nekovář, P. A note on residual drop and single drop formation. Appl. Sci. Res. 28, 134–144 (1973). https://doi.org/10.1007/BF00413062
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DOI: https://doi.org/10.1007/BF00413062