scholarly journals Observation of dual-mode, Kelvin-Helmholtz instability vortex merger in a compressible flow

2017 ◽  
Vol 24 (5) ◽  
pp. 055705 ◽  
Author(s):  
W. C. Wan ◽  
G. Malamud ◽  
A. Shimony ◽  
C. A. Di Stefano ◽  
M. R. Trantham ◽  
...  
Keyword(s):  
Compressible Flow ◽  
Helmholtz Instability ◽  
Dual Mode ◽  
Vortex Merger

scholarly journals The Effect of a Dominant Initial Single Mode on the Kelvin–Helmholtz Instability Evolution: New Insights on Previous Experimental Results

2016 ◽  
Vol 138 (7) ◽  
Author(s):  
Assaf Shimony ◽  
Dov Shvarts ◽  
Guy Malamud ◽  
Carlos A. Di Stefano ◽  
Carolyn C. Kuranz ◽  
...  
Keyword(s):  
Vortex Dynamics ◽  
Single Mode ◽  
Mixing Zone ◽  
Helmholtz Instability ◽  
Initial Spectrum ◽  
Laser Facility ◽  
Order Of Magnitude ◽  
Initial Seed ◽  
Vortex Merger ◽  
Initial Mode

This paper brings new insights on an experiment, measuring the Kelvin–Helmholtz (KH) instability evolution, performed on the OMEGA-60 laser facility. Experimental radiographs show that the initial seed perturbations in the experiment are of multimode spectrum with a dominant single-mode of 16 μm wavelength. In single-mode-dominated KH instability flows, the mixing zone (MZ) width saturates to a constant value comparable to the wavelength. However, the experimental MZ width at late times has exceeded 100 μm, an order of magnitude larger. In this work, we use numerical simulations and a statistical model in order to investigate the vortex dynamics of the KH instability for the experimental initial spectrum. We conclude that the KH instability evolution in the experiment is dominated by multimode, vortex-merger dynamics, overcoming the dominant initial mode.

Spurious Suppression Effect by Transmit Bandpass Filters with HTS Dual-Mode Resonators for 5GHz Band

2009 ◽  
Vol E92-C (3) ◽  
pp. 288-295
Author(s):  
Kazunori YAMANAKA ◽  
Kazuaki KURIHARA ◽  
Akihiko AKASEGAWA ◽  
Masatoshi ISHII ◽  
Teru NAKANISHI
Keyword(s):  
Bandpass Filters ◽  
Dual Mode ◽  
Suppression Effect ◽  
Spurious Suppression

DUAL-MODE LINEAR ANALYSIS OF TEMPORAL INSTABILITY FOR POWER-LAW LIQUID SHEET

2016 ◽  
Vol 26 (4) ◽  
pp. 319-347 ◽  
Author(s):  
Han-Yu Deng ◽  
Feng Feng ◽  
Xiao-Song Wu
Keyword(s):  
Power Law ◽  
Linear Analysis ◽  
Liquid Sheet ◽  
Dual Mode ◽  
Temporal Instability

A COMPUTATIONAL STUDY OF A DUAL-MODE RAMJET COMBUSTOR WITH A CAVITY FLAMEHOLDER

2012 ◽  
Vol 11 (6) ◽  
pp. 487-510 ◽  
Author(s):  
Christer Fureby ◽  
J. Tegner ◽  
R. Farinaccio ◽  
Robert Stowe ◽  
D. Alexander
Keyword(s):  
Computational Study ◽  
Dual Mode ◽  
Ramjet Combustor
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