“…The value of droplet drag coefficient in liquid-liquid emulsion flows (such as flow through the LLHC) depends on droplet Reynolds number and viscosity ratio k (dispersed phase-to-continuous phase viscosity ratio, k = p / c ) (Rovinsky, 1995;Delfos et al, 2004). For pure droplets with no contaminant, there is a slip flow along the interface which is driven by internal circulation that reduces the drag coefficient (Loth, 2008).…”