Empirical Correlation of the Primary Stability Variable of Liquid Jet and Liquid Sheet Under Acoustic Field

Sivadas, V.; Balaji, K.; Sampathkumar, M.c; Hassan, Mohammad Mirza; Karthik, K.; Saidileep, K.b

doi:10.1115/1.4033028

Cited by 9 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the acoustic field parallel to the jet stream, Sivadas, Fernandes & Heitor (2003) and Sivadas et al (2016) experimentally investigated the breakup length of the liquid jet and the sheet corresponding to the sound intensity; they established empirical formulas between the breakup length and the acoustic number. More recently, Chaussonnet et al (2017) conducted an experimental study on prefilming airblast atomization in an oscillating air flow field and obtained a SMD prediction model based on linear stability theory in a steady basic flow.…”

Section: Introductionmentioning

confidence: 99%

“…In the acoustic field parallel to the jet stream, Sivadas, Fernandes & Heitor (2003) and Sivadas et al. (2016) experimentally investigated the breakup length of the liquid jet and the sheet corresponding to the sound intensity; they established empirical formulas between the breakup length and the acoustic number. More recently, Chaussonnet et al.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study on the oscillatory Kelvin–Helmholtz instability of a planar liquid sheet in the presence of axial oscillating gas flow

et al. 2023

View full text Add to dashboard Cite

The oscillatory Kelvin–Helmholtz (K–H) instability of a planar liquid sheet was experimentally investigated in the presence of an axial oscillating gas flow. An experimental system was initiated to study the oscillatory K–H instability. The surface wave growth rates were measured and compared with theoretical results obtained using the authors’ early linear method. Furthermore, in a larger parameter range experimentally studied, it is interesting that there are four different unstable modes: first disordered mode (FDM), second disordered mode (SDM), K–H harmonic unstable mode (KHH) and K–H subharmonic unstable mode (KHS). These unstable modes are determined by the oscillating amplitude, oscillating frequency and liquid inertia force. The frequencies of KHH are equal to the oscillating frequency; the frequency of KHS equals half the oscillating frequency, while the frequencies of FDM and SDM are irregular. By considering the mechanism of instability, the instability regime maps on the relative Weber number versus liquid Weber number (Werel–Wel) and the Weber number ratio versus the oscillating frequency (Werel/Wel– $\varOmega$ s2) were plotted. Among these four modes, KHS is the most unexpected: the frequency of this mode is not equal to the oscillating frequency, but the surface wave can also couple with the oscillating gas flow. Linear instability theory was applied to divide the parameter range between the different unstable modes. According to linear instability theory, K–H and parametric unstable regions both exist. However, note that all four modes (KHH, KHS, FDM and SDM) corresponded primarily to the K–H unstable region obtained from the theoretical analysis. Nevertheless, the parametric unstable mode was also observed when the oscillating frequency and amplitude were relatively low, and the liquid inertia force was relatively high. The surface wave amplitude was small but regular, and the evolution of this wave was similar to that of Faraday waves. The wave oscillating frequency was half that of the surface wave.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study on the oscillatory Kelvin–Helmholtz instability of a planar liquid sheet in the presence of axial oscillating gas flow

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Active methods include co-axial or parallel air flow, electrostatic force and ultrasonic waves. An experimental study conducted by Sivadas et al, [1] illustrated the optimum length of the windpipe which transmits the acoustic energy to the cavity of the twin-fluid atomizer from the compression driver. This enhances the liquid column breakup process.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Validating the Spray Characteristics of a Co-axial Twin-Fluid Atomizer Using OpenFOAM

Sathishkumar

Rao

Pradeep

et al. 2022

ARFMTS

View full text Add to dashboard Cite

Today, the applications of sprays cover a wide range of fields. Their role in internal combustion engines is instrumental in maintaining higher engine efficiency. A deeper understanding of the liquid-gas phase interaction in sprays is crucial to the atomization process. The methods and models used in the simulations have their challenges due to the various discretization schemes and solutions used. To develop and validate the computational models, well defined experimental data is required. In the present work, spray characteristics were studied numerically through OpenFOAM. As the spray characteristics are closely linked with the liquid breakup length, this study focuses on the primary breakup phenomena and the breakup length of the liquid jet emanating from the twin-fluid co-axial flow atomizer. Numerical simulations were performed for a wide range of initial conditions and the breakup length of the spray was validated against the experimental observed by Sivadas et al., [26]. These simulations were carried out using a Eulerian based VOF solver that models the fluid as a continuum. K-Epsilon model was used to predict the turbulent nature of the spray. The air and water velocities were varied between 19.0 to 31.3 m/s and 0.7 to 1.8 m/s respectively. The proposed model was able to predict the computed breakup length within 20% of the experimental values. The present model can be further extended to test for a co-axial swirl injector to predict finer spray formation.

show abstract

Linear instability of viscoelastic planar liquid sheets in the presence of gas velocity oscillations

Jia

Xie

Yang

et al. 2019

Journal of Non-Newtonian Fluid Mechanics

View full text Add to dashboard Cite

Empirical Correlation of the Primary Stability Variable of Liquid Jet and Liquid Sheet Under Acoustic Field

Cited by 9 publications

References 11 publications

Experimental study on the oscillatory Kelvin–Helmholtz instability of a planar liquid sheet in the presence of axial oscillating gas flow

Experimental study on the oscillatory Kelvin–Helmholtz instability of a planar liquid sheet in the presence of axial oscillating gas flow

Modelling and Validating the Spray Characteristics of a Co-axial Twin-Fluid Atomizer Using OpenFOAM

Linear instability of viscoelastic planar liquid sheets in the presence of gas velocity oscillations

Contact Info

Product

Resources

About