Breakup Mechanism and Daughter Drop Production in Laminar Flow

2 Breakup Mechanism and Daughter Drop Production in Laminar Flow 

To the authors knowledge, there are practically no data or fnndamental analysis for drop dispersion in stirred tanks under laminar flow conditions. There are several reasons for this somewhat surprising occurrence. Viscous formulations are often produced in highly specialized equipment and exhibit complex and varied 

From an analytical viewpoint, the flow fields in laminar devices are highly dependent on geometry, and individual drops experience varied deformation paths of long time scale that are difficult to analyze. Even if Lagrangian tracking of deformation and breakup history of many drops were possible, it would be difficult to apply this information to real-life systems. Therefore, most studies 

It is not our purpose to provide a complete discussion of drop deformation and breakup in idealized laminar flow fields. There have been numerous studies that have been reviewed by Rallison (1984), Stone (1994), and others. Only the most practically relevant studies are discussed below. Of central importance is to predict and/or correlate the size above which a parent drop of known physical properties (that is subjected to an imposed deformation) will become unstable and break up into smaller drops. This size is referred to as the critical or maximum stable drop size, dmax- 

Critical stability curves for simple shear (SSF) and simple extensional 

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