Numerical simulations are carried out to study the breakup phenomena of liquid jets issuing from nozzles into gas. Liquid gas interface is captured using the state of art moment-of-fluid (MOF) methods. Directional split method is used for the advection of the liquid-gas interface and a block structured adaptive mesh refinement method is used to locally increase the resolution in the regions of interest. The breakup of two-dimensional and three-dimensional liquid jets is investigated. The influence of jet exit velocity on the breakup is studied. Comparisons are made with theoretical solutions and good agreement is observed. The parallel efficiency test shows that the block structured framework can achieve high parallel efficiency.

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