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Physics > Plasma Physics

arXiv:1605.06694 (physics)
[Submitted on 21 May 2016]

Title:Experimental investigation of flow induced dust acoustic shock waves in a complex plasma

Authors:S. Jaiswal, P. Bandyopadhyay, A. Sen
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Abstract:We report on experimental observations of flow induced large amplitude dust-acoustic shock waves (DASW) in a complex plasma. The experiments have been carried out in a $\Pi$ shaped DC glow discharge experimental device using kaolin particles as the dust component in a background of Argon plasma. A strong supersonic flow of the dust fluid is induced by adjusting the pumping speed and neutral gas flow into the device. An isolated copper wire mounted on the cathode acts as a potential barrier to the flow of dust particles. A sudden change of gas flow rate is used to trigger the onset of high velocity dust acoustic shocks whose dynamics are captured by fast video pictures of the evolving structures. The physical characteristics of these shocks are delineated through a parametric scan of their dynamical properties over a range of flow speeds and potential hill heights. The observed evolution of the shock waves and their propagation characteristics are found to compare well with model numerical results based on a modified Korteweg-de-Vries-Burgers type equation.
Subjects: Plasma Physics (physics.plasm-ph)
Cite as: arXiv:1605.06694 [physics.plasm-ph]
  (or arXiv:1605.06694v1 [physics.plasm-ph] for this version)
  https://doi.org/10.48550/arXiv.1605.06694
Related DOI: https://doi.org/10.1063/1.4960032

Submission history

From: Surabhi Jaiswal [view email]
[v1] Sat, 21 May 2016 19:58:19 UTC (657 KB)
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