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breakup-regimes
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Numerical modeling of instability and breakup of elliptical liquid jets
, Article AIAA Journal ; Volume 58, Issue 6 , June , 2020 , Pages 2442-2449 ; Nasiri, M ; Amini, G ; Sharif University of Technology
American Institute of Aeronautics and Astronautics Inc
2020
Abstract
Numerical simulations are performed to provide an in-depth insight into the effect of instabilities on liquid jets discharging from elliptical orifices. The axis-switching phenomenon and breakup are simulated and characterized under the effect of disturbances imposed at the nozzle exit. The simulations are based on the volume of fluid approach and an adaptive meshing. A range of orifice aspect ratios from 1 to 4 at the Rayleigh breakup regime is considered. The evolution of the jet cross section and axis switching under the influence of disturbances is compared with that of nonperturbed elliptical jets. It is found that the axis-switching repetition and breakup length exponentially decrease...
Experimental study of liquid jets injected in crossflow
, Article Experimental Thermal and Fluid Science ; Volume 115 , 2020 ; Kebriaee, A ; Sharif University of Technology
Elsevier Inc
2020
Abstract
In this paper, we studied the behavior of liquid sheet and jet injection into a low-speed crossflow. Characteristics of primary breakup in a liquid sheet and jet are investigated for circular and rectangular orifices. Effect of dimensionless numbers on primary breakup regimes including jet trajectory, length, height, breakup, and spray characteristics are surveyed by the shadowgraphy technique at ambient pressure and temperature. Tests were performed in the range of 0.8–16.57 for the Weber number, 5–250 for the momentum flux ratio, and 380–1850 for the Reynolds number. This comprehensive study on rectangular jets in crossflow leads to introduce the transition regions of the primary...