The drainage of non-Newtonian fluids in the quasi-steady motion of a sphere towards a plane
Idioma
en
Article de revue
Este ítem está publicado en
Microfluidics and Nanofluidics. 2012-01, vol. 12, n° 1-4, p. 639-648
Springer Verlag
Resumen en inglés
In the lubrication limit, the time needed for the drainage of the liquid film between two particles or between particles and walls is of industrial importance, because it controls the dynamics and aggregation of nondilute ...Leer más >
In the lubrication limit, the time needed for the drainage of the liquid film between two particles or between particles and walls is of industrial importance, because it controls the dynamics and aggregation of nondilute suspensions. This problem is also of fundamental interest in the application of the dynamic surface force apparatus to nanorheology. Even if this problem has an exact solution in Newtonian fluid when the sphere moves steadily and slowly towards or away from a plane wall, this problem remains, to our knowledge, without any exact analytical solution in non-Newtonian fluids with negligible viscoelastic components. But Rodin, using the method of asymptotic expansions, gives an asymptotic solution to this problem in the lateral unbounded power-law fluid. Therefore, in this study, we give a numerical result using the dynamic mesh technique and an asymptotic analytical formula valid in the lubrication regime, for a fluidity index 0.5< Leer menos
Palabras clave en inglés
Dynamic surface force apparatus
Non-Newtonian fluids
Power-law fluids
Sphere towards a plane
Hydrodynamic interactions
Orígen
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