Head-on Collision Of Two Equal-sized Drops With Van Der Waals Forces
Author(s)
X. Jiang & A.J. James
Abstract
Head-on collision of two equal-sized drops with
van der Waals forces
X. Jiang & A.J. James
Department of Aerospace Engineering and Mechanics, University oj
Minnesota, USA
Abstract
Drop collision is significant not only in natural processes, such as raindrop formation,
but also in various engineering applications, such as chemical separation,
spray coating, encapsulation, and drug delivery. In this study, head on collision of
two equal-sized drops in a hyperbolic flow is investigated numerically. It is well
known that van der Waals forces become important and govern coalescence when
the thickness of the fluid film between the two drops falls into the range of several
hundreds of Angstroms, 100-1000 A. We have developed two new numerical
methods to introduce non-retarded van der Waals forces into the Navier-Stokes
equations. An axisymmetric volume of fluid (VOF) method is used to simulate the
motion of a drop toward a symmetry plane where it interacts with, and possibly
coalesces with, its mirro
Keywords
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