Unified spray breakup model

Drop breakup enters the spray equation via the source term/bu in (19.45). There are various ways of accounting for drop breakup, most of which are also used for a rudimentary description of the atomization process. Some of these approaches are discussed in more detail in Chap. 9, and include the TAB model of O Rourke and Amsden [37], the Wave Breakup model of Reitz and coworkers [46, 40], the Unified Spray Breakup model of Chryssakis and Assanis [10], and the Cascade Atomization and Drop Breakup model of Tanner [54]. 

In the Unified Spray Breakup (USB) model, the spray breakup has been divided into three distinct sub-processes, namely, primary atomization, drop deformation due to aerodynamic drag, and secondary atomization [13, 14],... 

C. Chryssakis, D.N. Assanis, A unified fuel spray breakup model for internal combustion engine applications. Atomization and Sprays, 18(5) 375-426, 2008. 

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