Capillary instability of an annular liquid jet surrounding a solid cylinder

1987 ◽  
Vol 9 (10) ◽  
pp. 1233-1243 ◽  
Author(s):  
Ahmed E. Radwan
Keyword(s):  
Liquid Jet ◽  
Solid Cylinder ◽  
Capillary Instability ◽  
Annular Liquid Jet

Linear instability of an annular liquid jet with gas velocity oscillations

2021 ◽  
Vol 33 (5) ◽  
pp. 054110
Author(s):  
Xin-yan Guan ◽  
Bo-qi Jia ◽  
Li-jun Yang ◽  
Qing-fei Fu
Keyword(s):  
Linear Instability ◽  
Liquid Jet ◽  
Gas Velocity ◽  
Annular Liquid Jet

Simulation of an annular liquid jet with a coaxial supersonic gas jet in a medical inhaler

2021 ◽  
Author(s):  
Yanchao Liu ◽  
Anne Geppert ◽  
Chu Xu ◽  
Benjamin Heine ◽  
Bernhard Weigand
Keyword(s):  
Gas Jet ◽  
Liquid Jet ◽  
Supersonic Gas Jet ◽  
Annular Liquid Jet

The nonlinear capillary instability of a liquid jet. Part 1. Theory

1980 ◽  
Vol 96 (2) ◽  
pp. 257-274 ◽  
Author(s):  
K. C. Chaudhary ◽  
L. G. Redekopp
Keyword(s):  
Surface Waves ◽  
Initial Velocity ◽  
Harmonic Component ◽  
Oscillatory Solution ◽  
Liquid Column ◽  
Liquid Jet ◽  
Galilean Transformation ◽  
Third Order ◽  
Capillary Instability ◽  
Satellite Drops

Nonlinear capillary instability of an axisymmetric infinite liquid column is investigated with an initial velocity disturbance consisting of a fundamental and one harmonic component. A third-order solution is developed using the method of strained co-ordinates. For the fundamental disturbance alone, the solution shows that a cut-off zone of wavenumbers (k) exists such that the surface waves grow exponentially below the cut-off zone, linearly in the middle of the zone (near k = 1), and an oscillatory solution exists for wavenumbers above the boundary of the zone. For an input including both the fundamental and a harmonic, all wave components grow exponentially when the fundamental is below the cut-off zone. Using a Galilean transformation, the solution is applied to a progressive jet issuing from a nozzle. The jet breaks into drops interspersed with smaller (satellite) drops for k < 0·65; no satellites exist for k > 0·65. It is shown theoretically that the formation of satellites can be controlled by forcing the jet with a suitable harmonic added to the fundamental.

scholarly journals Direct Computation of an Annular Liquid Jet

2007 ◽  
Vol 1 (1) ◽  
pp. 103-126 ◽  
Author(s):  
Xi Jiang ◽  
George A. Siamas
Keyword(s):  
Liquid Jet ◽  
Direct Computation ◽  
Annular Liquid Jet

scholarly journals Thermal Effect on the Instability of Annular Liquid Jet

Aerospace ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 382
Author(s):  
Xiao Cui ◽  
Boqi Jia
Keyword(s):  
Reynolds Number ◽  
Temperature Gradient ◽  
Thermal Effect ◽  
Weber Number ◽  
Marangoni Effect ◽  
Critical Value ◽  
Liquid Jet ◽  
Radial Temperature Gradient ◽  
Radial Temperature ◽  
Annular Liquid Jet

The linear instability of an annular liquid jet with a radial temperature gradient in an inviscid gas steam is investigated theoretically. A physical model of an annular liquid jet with a radial temperature gradient is established, dimensionless governing equations and boundary conditions are given, and numerical solutions are obtained using the spectral collocation method. The correctness of the results is verified to a certain extent. The liquid surface tension coefficient is assumed to be a linear function of temperature. The effects of various dimensionless parameters (including the Marangoni number/Prandtl number, Reynolds number, temperature gradient, Weber number, gas-to-liquid density ratio and velocity ratio) on the instability of the annular liquid jet are discussed. A decreasing Weber number destabilizes the annular liquid jet when the Weber number is lower than a critical value. It is found that the effects of the Marangoni effect are related to the Weber number. The Marangoni effect enhances instability when the Weber number is small, while the Marangoni effect weakens instability when the Weber number is large. In addition, because the thermal effect is considered, a decreasing Reynolds number enhances the instability when the Weber number is lower than a critical value, which is similar to the results of a viscous liquid sheet with a temperature difference between two planar surfaces. Furthermore, the effects of other dimensionless parameters are also investigated.

EXPERIMENTS ON ANNULAR LIQUID JET BREAKUP

2001 ◽  
Vol 11 (5) ◽  
pp. 18 ◽  
Author(s):  
Jihua Shen
Keyword(s):  
Liquid Jet ◽  
Jet Breakup ◽  
Annular Liquid Jet
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