3

The Physics of Dropletsimage

3.1 Introduction

The importance of droplets in microfluidics has been pointed out in the introduction of the preceding chapter, where we presented the principles of capillarity and surface tension effects. This chapter is particularly devoted to the behavior of droplets and micro-drops.

In this chapter, the shape of micro-drops in different situations typical of microsystems is investigated, assuming that these micro-drops are in an equilibrium state, i.e., at rest, or moving at a sufficiently low velocity that the inertial forces can be neglected. Different situations will be examined: sessile droplets deposited on ...

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