Temporal instability of coflowing liquid-gas jets under an electric field

2014 ◽  
Vol 26 (5) ◽  
pp. 054101 ◽  
Author(s):  
Guangbin Li ◽  
Xisheng Luo ◽  
Ting Si ◽  
Ronald X. Xu
Keyword(s):  
Electric Field ◽  
Gas Jets ◽  
Temporal Instability

Three-Dimensional Temporal Instability of Compressible Gas Jets Injected in Liquids

AIAA Journal ◽  
10.2514/2.714 ◽  
1999 ◽  
Vol 37 (2) ◽  
pp. 202-207 ◽  
Author(s):  
Krishnan Subramaniam ◽  
Ramkumar N. Parthasarathy ◽  
Kai-Ming Chiang
Keyword(s):  
Three Dimensional ◽  
Gas Jets ◽  
Temporal Instability ◽  
Compressible Gas

Three-dimensional temporal instability of compressible gas jets injected in liquids

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 202-207
Author(s):  
Krishnan Subramaniam ◽  
Ramkumar N. Parthasarathy ◽  
Kai-Ming Chiang
Keyword(s):  
Three Dimensional ◽  
Gas Jets ◽  
Temporal Instability ◽  
Compressible Gas

Effects of confinement on the temporal instability of gas jets injected in viscous liquids

2000 ◽  
Vol 12 (1) ◽  
pp. 89-91 ◽  
Author(s):  
K. Subramaniam ◽  
R. N. Parthasarathy
Keyword(s):  
Viscous Liquids ◽  
Gas Jets ◽  
Temporal Instability

Temporal instability of gas jets injected in viscous liquids to three-dimensional disturbances

1998 ◽  
Vol 10 (8) ◽  
pp. 2105-2107 ◽  
Author(s):  
R. N. Parthasarathy ◽  
Kai-Ming Chiang
Keyword(s):  
Three Dimensional ◽  
Viscous Liquids ◽  
Gas Jets ◽  
Temporal Instability

Temporal instability of swirling gas jets injected in liquids

2001 ◽  
Vol 13 (10) ◽  
pp. 2845-2850 ◽  
Author(s):  
R. N. Parthasarathy ◽  
K. Subramaniam
Keyword(s):  
Gas Jets ◽  
Temporal Instability

Instability of Viscoelastic Annular Liquid Jets in a Radial Electric Field

2014 ◽  
Vol 136 (8) ◽  
Author(s):  
Lu-jia Liu ◽  
Li-peng Lu
Keyword(s):  
Growth Rate ◽  
Electric Field ◽  
Weber Number ◽  
Radial Electric Field ◽  
Wave Number ◽  
Liquid Jets ◽  
Instability Analysis ◽  
Temporal Instability ◽  
Spatiotemporal Instability ◽  
The Absolute

Research on the instability of viscoelastic annular liquid jets in a radial electric field has been carried out. The analytical dimensionless dispersion relation between unstable growth rate and wave number is derived by linear stability analysis. The Oldroyd B model was used to describe the viscoelastic characteristics of the viscoelastic fluids. Considering that the para-sinuous mode has been found to be always dominant in the jet instability, the effects of various parameters on the instability of viscoelastic annular liquid jets are examined only in the para-sinuous mode. Nondimensionalized plots of the solutions exhibit the stabilizing or destabilizing influences of electric field effects and the physical properties of the liquid jets. Both temporal instability analysis and spatiotemporal instability analysis were conducted. The results show that the radial electric field has a dual impact on viscoelastic annular liquid jets in the temporal mode. Physical mechanisms for the instability are discussed in various possible limits. The effects of Weber number, elasticity number, and electrical Euler number for spatiotemporal instability analysis were checked. As the Weber number increases, the liquid jet is first in absolute instability and then in convective instability. However, the absolute value of the absolute growth rate at first decreases, and then increases with the increase of We, which is in accordance with temporal instability analysis. Comparisons of viscoelastic annular jets with viscoelastic planar liquid jets and cylindrical liquid jets were also carried out.

Resolution in photoelectron microscopy

1991 ◽  
Vol 49 ◽  
pp. 458-459
Author(s):  
G. F. Rempfer
Keyword(s):  
Electron Microscopy ◽  
Electric Field ◽  
Ultraviolet Light ◽  
Uniform Field ◽  
Virtual Image ◽  
Lens System ◽  
Photoemission Electron Microscopy ◽  
Planar Electrode ◽  
Electron Lens ◽  
Photoemission Electron

In photoelectron microscopy (PEM), also called photoemission electron microscopy (PEEM), the image is formed by electrons which have been liberated from the specimen by ultraviolet light. The electrons are accelerated by an electric field before being imaged by an electron lens system. The specimen is supported on a planar electrode (or the electrode itself may be the specimen), and the accelerating field is applied between the specimen, which serves as the cathode, and an anode. The accelerating field is essentially uniform except for microfields near the surface of the specimen and a diverging field near the anode aperture. The uniform field forms a virtual image of the specimen (virtual specimen) at unit lateral magnification, approximately twice as far from the anode as is the specimen. The diverging field at the anode aperture in turn forms a virtual image of the virtual specimen at magnification 2/3, at a distance from the anode of 4/3 the specimen distance. This demagnified virtual image is the object for the objective stage of the lens system.

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