ABSTRACT

The Centre for Multiphase Processes, Department of Chemical Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia

INTRODUCTION

The adhesion of spheres to flat surfaces is of direct relevance to a range of processes both from the industrial viewpoint and in the natural world. For example, in the natural world adhesion plays a critical role

in processes such as blood clotting, platelet binding, and leukocyte adhesion to cell walls [1]. In the technological world, the control of adhesion has important consequences in a wide variety of processes such as drug delivery, xerography, paints, and solids handling [2]. As a result, much effort has been devoted to gaining both a theoretical understanding and experimental insights into adhesion mechanisms.