Rayleigh—Plateau effect

Figure 3 Forces acting on dispersed fluids. (A) The balance of shearing force and interfacial force on a dripping ruptured droplet. The small arrows show the flow field around the droplet. (B) A jetting liquid in a coflowing microchannel. The interfacial force dominates the break-up of droplets under the Rayleigh-Plateau effect. Pane/fAj Tb/s figure is adapted from Wang et al (201 la) with permission of Wiley.

FIGURE 20.7 The physical mechanism of Rayleigh-Plateau instability the undeformed jet (a) start to deform due to external pressure oscillations (b) surface deformations are amplified by Laplace pressure effects (c) until a jet breakup occurs (d). The new drops eventually recover their spherical shape (e). 

At room temperature, the value of kT equals approximately 200 cm showing that Eq. (2) is only strictly valid in the region much less than 200 cm The effect of Eq. (2) on the Rayleigh line is given in Fig. 1, showing that the Rayleigh line is converted into a real plateau. 

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