Journal of Fluid Mechanics

Buoyancy-driven motion of a deformable drop toward a planar wall at low Reynolds number

E. P.  Ascoli a1p1, D. S.  Dandy a1p2 and L. G.  Leal a1p3
a1 Department of Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA

Article author query
ascoli ep   [Google Scholar] 
dandy ds   [Google Scholar] 
leal lg   [Google Scholar] 


The slow viscous motion of a deformable drop moving normal to a planar wall is studied numerically. In particular, a boundary integral technique employing the Green's function appropriate to a no-slip planar wall is used. Beginning with spherical drop shapes far from the wall, highly deformed and ‘dimpled’ drop configurations are obtained as the planar wall is approached. The initial stages of dimpling and their evolution provide information and insight into the basic assumptions of film-drainage theory.

(Published Online April 26 2006)
(Received February 17 1989)

p1 Present address: Rockwell International, Rocketdyne Division M/S WC75, 6633 Canoga Avenue, Canoga Park, CA 91303, USA.
p2 Present address: Div. 8363, Sandia National Laboratories, PO Box 969, Livermore, CA 94550, USA.
p3 Present address: Department of Chemical and Nuclear Engineering, University of California, Santa Barbara, CA 93106, USA.