Articles | Volume 23, issue 2
Nonlin. Processes Geophys., 23, 83–89, 2016
https://doi.org/10.5194/npg-23-83-2016

Special issue: Complex environmental and geophysical turbulence

Nonlin. Processes Geophys., 23, 83–89, 2016
https://doi.org/10.5194/npg-23-83-2016

Research article 04 Apr 2016

Research article | 04 Apr 2016

Dual-plane PIV investigation of acoustically excited jets in a swirl nozzle

Gavita S. Regunath et al.

Related subject area

Subject: Nonlinear Waves, Pattern Formation, Turbulence | Topic: Climate, atmosphere, ocean, hydrology, cryosphere, biosphere
Particle clustering and subclustering as a proxy for mixing in geophysical flows
Rishiraj Chakraborty, Aaron Coutino, and Marek Stastna
Nonlin. Processes Geophys., 26, 307–324, https://doi.org/10.5194/npg-26-307-2019,https://doi.org/10.5194/npg-26-307-2019, 2019
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Explosive instability due to flow over a rippled bottom
Anirban Guha and Raunak Raj
Nonlin. Processes Geophys., 26, 283–290, https://doi.org/10.5194/npg-26-283-2019,https://doi.org/10.5194/npg-26-283-2019, 2019
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Internal waves in marginally stable abyssal stratified flows
Nikolay Makarenko, Janna Maltseva, Eugene Morozov, Roman Tarakanov, and Kseniya Ivanova
Nonlin. Processes Geophys., 25, 659–669, https://doi.org/10.5194/npg-25-659-2018,https://doi.org/10.5194/npg-25-659-2018, 2018
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On the phase dependence of the soliton collisions in the Dyachenko–Zakharov envelope equation
Dmitry Kachulin and Andrey Gelash
Nonlin. Processes Geophys., 25, 553–563, https://doi.org/10.5194/npg-25-553-2018,https://doi.org/10.5194/npg-25-553-2018, 2018
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Laboratory and numerical experiments on stem waves due to monochromatic waves along a vertical wall
Sung Bum Yoon, Jong-In Lee, Young-Take Kim, and Choong Hun Shin
Nonlin. Processes Geophys., 25, 521–535, https://doi.org/10.5194/npg-25-521-2018,https://doi.org/10.5194/npg-25-521-2018, 2018
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Cited articles

André, J. C. and Lesieur, M.: Influence of helicity on the evolution of isotropic turbulence at high Reynolds number, J. Fluid Mech., 81, 187–207, 1977.
Crow, S. C. and Champagne, F. H.: Orderly structure in jet turbulence, J. Fluid Mech., 48, 547–591, 1971.
Drobniak, S. and Klajny, R.: Coherent structures of free acoustically stimulated jet, J. Turbulence, 3, 1, 2002.
Hassell, D. G. and Zimmerman, W. B.: Investigation of the convective motion through a staggered herringbone micromixer at low Reynolds number flow, Chem. Eng. Sci., 61, 2977–2985, 2006.
Khomenko, G. A. and Zimmerman, W. B.: Large scale structure evolution and mixing due to small scale helical forcing in a compressible viscous fluid, in: Mixing in Geophysical Flows, edited by: Redondo, J. and Metais, O., UPC Barcelona Press, Barcelona, 233–248, 1994.
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Short summary
Helical structures are commonplace in geophysical flows, but their effect on turbulence is still enigmatic. A novel PIV laser technique has been used to analyze helical structures in a turbulent swirling jet where the underlying shear flow is subjected to external acoustic forcing. Although the acoustic excitation had an effect on the flow field, no evidence for the existence of large-scale helical structures with maximal helicity was found.