Abstract
An infinitely long liquid bridge, observing a Non-Newtonian flow law (Ostwald-de-Waal and Bingham), is subjected under weightless condition to a linear temperature field, which yields due to the local change of the surface tension a Marangoni convection. The velocity- and temperature distribution inside the liquid bridge is determined analytically.
Zusammenfassung
Eine unendlich lange Flüssigkeitsbrücke, die einem Nicht-Newtonischen Fließgesetz (Ostwald-de-Waal und Bingham) folgt, ist im schwerelosen Raum einem linearen Temperaturfeld ausgesetzt, das in der Flüssigkeitssäule eine Marangoni-Konvektion hervorruft. Es wird die Geschwindigkeits- und Temperaturverteilung in der Flüssigkeitsbrücke analytisch bestimmt.
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Abbreviations
- a :
-
radius of liquid column
- k :
-
thermal conductivity
- K :
-
material constant of Ostwald-de-Waal liquid
- n :
-
material constant of Ostwald-de-Waal liquid
- p :
-
liquid pressure
- r :
-
radial coordinate
- T :
-
temperature
- ¯T1 :
-
temperature gradient along z-axis
- w :
-
velocity distribution of liquid in axial direction
- z :
-
axial coordinate
- x :
-
diffusivity
- σ :
-
liquid surface tension
- τ:
-
tangential stress
- τ0 :
-
flow shear stress for Bingham plastic
- η :
-
dynamic viscosity of Newtonian liquid(k=η, n=1)
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Bauer, F. Heat transport in an infinitely long Non-Newtonian liquid bridge due to marangoni convection. Wärme- und Stoffübertragung 16, 229–235 (1982). https://doi.org/10.1007/BF01375647
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DOI: https://doi.org/10.1007/BF01375647