scholarly journals Numerical Simulation of Liquid Jet Atomization Including Turbulence Effects

2005 ◽  
Author(s):  
Huu Trinh ◽  
C. P. Chen ◽  
Balasubramanyam
Keyword(s):  
Numerical Simulation ◽  
Liquid Jet ◽  
Turbulence Effects ◽  
Liquid Jet Atomization

scholarly journals Numerical Simulation of Liquid Jet Atomization Including Turbulence Effects

2007 ◽  
Vol 129 (4) ◽  
pp. 920-928 ◽  
Author(s):  
Huu P. Trinh ◽  
C. P. Chen ◽  
M. S. Balasubramanyam
Keyword(s):  
Current Model ◽  
Droplet Breakup ◽  
Spray Angle ◽  
Liquid Jet ◽  
Primary Breakup ◽  
Turbulence Effects ◽  
Turbulence Effect ◽  
Blob Model ◽  
Secondary Breakup ◽  
Liquid Jet Atomization

This paper describes numerical implementation and validation of a newly developed hybrid model, T-blob/T-TAB, into an existing computational fluid dynamics (CFD) program for primary and secondary breakup simulation of liquid jet atomization. This model extends two widely used models, the Kelvin-Helmholtz (KH) instability of Reitz (the “blob” model) (1987, Atomization Spray Technol., 3, pp. 309–337) and the Taylor-Analogy-Breakup (TAB) secondary droplet breakup of O’Rourke and Amsden (1987, SAE Technical Paper No. 872089) to include liquid turbulence effects. In the primary breakup model, the level of the turbulence effect on the liquid breakup depends on the characteristic scales and flow conditions at the liquid nozzle exit. Transition to the secondary breakup was modeled based on energy balance, and an additional turbulence force acted on parent drops was modeled and integrated into the TAB governing equation. Several assessment studies are presented, and the results indicate that the existing KH and TAB models tend to underpredict the product drop size and spray angle, whereas the current model provides superior results when compared to the measured data.

scholarly journals Estimation of High-Speed Liquid-Jet Velocity Using a Pyro Jet Injector

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Naohisa Takagaki ◽  
Toru Kitaguchi ◽  
Masashi Iwayama ◽  
Atsushi Shinoda ◽  
Hiroshige Kumamaru ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Liquid Jet ◽  
Liquid Density ◽  
Liquid Viscosity ◽  
Ejection Velocity ◽  
Piston Motion ◽  
Ansys Fluent ◽  
Piston Displacement ◽  
Jet Velocity

AbstractThe high-speed liquid-jet velocity achieved using an injector strongly depends on the piston motion, physical property of the liquid, and container shape of the injector. Herein, we investigate the liquid ejection mechanism and a technique for estimating the ejection velocity of a high-speed liquid jet using a pyro jet injector (PJI). We apply a two-dimensional numerical simulation with an axisymmetric approximation using the commercial software ANSYS/FLUENT. To gather the input data applied during the numerical simulation, the piston motion is captured with a high-speed CMOS camera, and the velocity of the piston is measured using motion tracking software. To reproduce the piston motion during the numerical simulation, the boundary-fitted coordinates and a moving boundary method are employed. In addition, we propose a fluid dynamic model (FDM) for estimating the high-speed liquid-jet ejection velocity based on the piston velocity. Using the FDM, we consider the liquid density variation but neglect the effects of the liquid viscosity on the liquid ejection. Our results indicate that the liquid-jet ejection velocity estimated by the FDM corresponds to that predicted by ANSYS/FLUENT for several different ignition-powder weights. This clearly shows that a high-speed liquid-jet ejection velocity can be estimated using the presented FDM when considering the variation in liquid density but neglecting the liquid viscosity. In addition, some characteristics of the presented PJI are observed, namely, (1) a very rapid piston displacement within 0.1 ms after a powder explosion, (2) piston vibration only when a large amount of powder is used, and (3) a pulse jet flow with a temporal pulse width of 0.1 ms.

scholarly journals Numerical Simulation on Behavior of Liquid Jet Issued into Still Air.

1999 ◽  
Vol 65 (631) ◽  
pp. 981-987 ◽  
Author(s):  
Takao INAMURA ◽  
Takehito TSUTAGAWA ◽  
Seong Jin CHO ◽  
Goro MASUYA
Keyword(s):  
Numerical Simulation ◽  
Liquid Jet

Numerical simulation of the nanoparticle-surface collision in a liquid jet and its effects on material removal

2020 ◽  
Vol 59 (05) ◽  
pp. 1
Author(s):  
Xuechu Zhao ◽  
Liran Ma ◽  
Yu Zhang ◽  
Xuefeng Xu ◽  
Jianbin Luo
Keyword(s):  
Numerical Simulation ◽  
Material Removal ◽  
Liquid Jet ◽  
Nanoparticle Surface ◽  
Surface Collision

G0210103 A numerical simulation of splash which laser induced liquid jet makes.

2014 ◽  
Vol 2014 (0) ◽  
pp. _G0210103--_G0210103-
Author(s):  
Toshikatsu WASHIO ◽  
Takashi KATO ◽  
Atsuhiro NAKAGAWA ◽  
Kinichi OGAWA ◽  
Teiji TOMINAGA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Liquid Jet
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