Numerical Simulation of Droplet Breakup Regimes in Secondary Atomization
The secondary atomization plays a key role in increasing both evaporation and mixing rates in a variety of engineering applications.The phenomenon was studied by numerical simulation based on SIMPLE scheme.The VOF method, coupled with the Level-Set method, was used to capture the boundary;the adaptive mesh strategy was taken to balance the demands for raising accuracy of calculation and for reducing computational expenditures.In the case of low Oh number, when Oh ＜ 0.1, four typical regimes of droplet breakup are observed in the simulation;and the comparatively more complicated the second and the third modes had undergone detailed analysis and comparison.The condition for the occurance of these modes and the pertinent features were obtained.Finally, comparison between these results and those of past experiments were made;in most part of significant aspects the two have very good agreement.
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