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Showing 1 to 17 of 17 for “"Meshkov"”.
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Richtmyer-Meshkov instability with reshock and particle interactions
Richtmyer-Meshkov instability (RMI) occurs when an interface of two fluids with different densities is impulsively accelerated. The main interest in RMI is to understand the growth of perturbations, and numerous theoretical models have been developed and validated against experimental/numerical …
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Study of magnetohydrodynamic effects for the Richtmyer-Meshkov instability
… and computational studies of the Richtmyer-Meshkov (RM) instability with Magnetohydrodynamic (MHD) effects. The experimental work does not consider the instability or its growth, but rather developes an atmospheric plasma jet for use in future magnetohydrodynamic experiments. The operating …
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Incident shock Mach number effects on Richtmyer-Meshkov mixing with simultaneous density and velocity measurements
… number (M) on the development of the Richtmyer-Meshkov instability after a shock wave impulsively accelerates a varicose-perturbed, heavy-gas curtain (air-SF6-air). Three cases of incident shock strength were experimentally investigated: M = 1.21, 1.36, and 1.50. The resulting instability and …
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Observation and Measurement of the Growth of the Primary Instabilities of the Richtmyer-Meshkov Instability and Observation of Secondary Instabilities
… in two of the key features of the Richtmyer-Meshkov (RM) instability in a shock-accelerated, initially cylindrical gas column; that is, the counter-rotating vortex pair and the central spike; and the observation of secondary instabilities within the primary instability. The formation of the …
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UNM Shock Tube Modernization
… discoveries in the field of Richtmyer-Meshkov instabilities has been made with this shock tube. While conducting these experiments, limitations on the operational aspects and data quality aspects of this research tool have been found. To further advance the state of the art, it was …
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Bioagent defeat in shock driven gas flow
… case, the flow evolution driven by Richtmyer-Meshkov instability is well characterized (although, as this thesis shows, assumptions commonly made about the experimental conditions need to be carefully checked). However, for a similar oblique interaction, with the plane of the shock and the …
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Analysis of Kelvin-Helmholtz Instabilities Developing from Oblique Shock Interaction with a Heavy Gas Column
… for the formation of traditional Richtmyer-Meshkov instabilities (RMI). Other instabilities develop along the interface due to shear between the injected material and the post-shock air (moving at piston velocity behind the column). These instabilities present on the leading (with respect to …
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Oblique shock interactions with gas cylinder interfaces
… (SF6) which generates the well-known Richtmyer-Meshkov Instability (RMI) when impulsively accelerated by a shock wave. This instability is formed due to the misalignment of the pressure and density gradients during the acceleration phase. The second is air. In this case, there is no macroscopic …
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Behavior of the Embedded Phase in a Shock-Driven Two-Phase Flow
… the injection system during earlier Richtmyer-Meshkov Instability studies. The second test section has no surface features interfering with the flow, with smooth interfaces. The quiescent air seeded with propylene glycol droplets (diameter 0.5-3um) is impulsively accelerated with a planar shock …
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Sensitivity to Imperfections of Analog Quantum Simulation on Atomic Qudits
… transitions (the transverse Ising and Lipkin-Meshkov-Glick mod- els). Experimental simulations show high fidelity of the quantum state and dynamical features in the presence of native imperfections. We discuss these results in the con- text of a new framework for quantifying the average …
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Meshless hydrodynamic simulations of young supernova remnants
… We showed that the growth of Richtmyer-Meshkov instabilities in the 2D and 3D 1/r 2 profiles are visible as early as 20 yrs into the evolution of the remnant and become increasingly unstable up to 100 yr. While 2D simulations of 1/r 2 profiles show the presence of the Richtmyer-Meshkov …
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Covering Shock Wave Induced Interfacial Mixing: Numerical Study and a Control Primer
… in the cylindrical & spherical Richtmyer-Meshkov and Rayleigh-Taylor Instabilities. This work is focused on identifying the most energetic structures of the ow in order to define a reduced order model intended for modeling the evolution of the mixing layer after reshocking the density …
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Design of experimental apparatus for generation and measurement of an aerosol
… have similar flow morphology to the Richtmeyer-Meshkov Instability (RMI), however, the driving force that induces instability is different. Current methods of aerosol production and measurement with pros and cons are given to justify the adaption of the selected method for our system. Chapter 2 …
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Oblique shock interactions With perturbed density interfaces
… (SF6), which generates the well known Richtmyer-Meshkov Instability (RMI) when accelerated by a shock wave. This instability is formed due to a mis-alignment of the pressure and density gradients during impulsive acceleration. The second gas is air. There is no density gradient between the gas …
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Oblique Shock Wave Effects on Impulsively Accelerated Heavy Gas Column
… interface produced a typical Richtmyer- Meshkov instability (RMI) consisting of a primary counter-rotating vortices. The streamwise extent of the vortex pair in the centerline plane (cross-section) images of the column is proportional to the square root of A divided by the square root of …
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Analysis of Dynamic Surface Instabilities in Soft Hydrogel Cylinders Subject to Laser-Driven Shock-Loading
… including Rayleigh-Taylor, Faraday and Richtmyer-Meshkov instabilities. This thesis is concerned with the analysis and mechanistic explanation of a new elastodynamic instability that was recently discovered at MIT. Laser-driven experiments performed at the MIT Institute for Soldier …
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The impact and rupture of a water-filled balloon on a rigid surface
… argued to be closely-related to the Richtmyer-Meshkov instability. A model is then derived for the case of a balloon oscillated and burst with water both inside and outside, and is shown to be in approximate agreement with experiments.