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Monday, July 27, 2020 | History

2 edition of Numerical simulation of strong plasma shock waves produced in an electromagnetic shock tube. found in the catalog.

Numerical simulation of strong plasma shock waves produced in an electromagnetic shock tube.

Stephen Henry Schneider

Numerical simulation of strong plasma shock waves produced in an electromagnetic shock tube.

by Stephen Henry Schneider

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Published .
Written in English

    Subjects:
  • Plasma waves.,
  • Shock waves.,
  • Shock tubes.

  • Classifications
    LC ClassificationsQC718 .S33
    The Physical Object
    Paginationx, 104 l.
    Number of Pages104
    ID Numbers
    Open LibraryOL5325536M
    LC Control Number72178344

    The shock wave from a supersonic object is a cone composed of overlapping spherical wavefronts. As any one of these wavefronts forms, it propagates radially outward at speed c and acquires a radius ct. At the same time the source, traveling at speed v moves forward vt. These two displacements form the leg and hypotenuse, respectively, of a. Shock wave, strong pressure wave in any elastic medium such as air, water, or a solid substance, produced by supersonic aircraft, explosions, lightning, or other phenomena that create violent changes in pressure. Shock waves differ from sound waves in that the wave front, in which compression takes place.

    stochastic mechanisms caused by strong electromagnetic fields near a shock front [1,2]. These studies were con-cerned with acceleration processes after formation of a shock wave. Shock formation process from a strong disturbance in a collisionless plasma has also been an important issue in plasma physics [3,4] because it would be quite different. Buy Physics of Collisionless Shocks: Space Plasma Shock Waves (ISSI Scientific Report Series) reflecting particles back upstream and generating high electromagnetic wave intensities. Particle acceleration and turbulence at such shocks become possible and important. Part II treats planetary bow shocks and the famous Heliospheric Termination Cited by:

    Numerical Solution of Shock Tube Divertor and Relativistic Electron Beam Vacuum Fields: Chu: PP: Numerical Simulation of Strong Plasma Shock Waves Produced in an Electromagnetic Shock Tube: Chu: PP: Soran, Patrick.   The present book provides a contemporary systematic treatment of shock waves in high-temperature collisionless plasmas as are encountered in near Earth space and in Astrophysics. It consists of two parts. Part I develops the complete theory of shocks in dilute hot plasmas under the assumption of absence of collisions among the charged particles when the .


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Numerical simulation of strong plasma shock waves produced in an electromagnetic shock tube by Stephen Henry Schneider Download PDF EPUB FB2

Numerical Simulation of Strong Plasma Shock Waves Produced in AN Electromagnetic Shock Tube. Plasma Flow in in Electromagnetic Shock Tube ana in B Compression shock Tube - By - J. Wilson, D.

Schofield and J. Regan A comparison has been made of two faoilities at N.P.L. designed to produce short-duration, high-enthalpy flows. These facilities tie both shockFile Size: KB. Numerical investigation of shock-wave reflection problems in steady flows.

The interaction of a shock wave discharged from the open end of a shock tube with a flat plate. Analyses of reflection and diffraction of weak shock waves. Computation and validation of shock-wave interaction with fluid inhomogeneities.

Numerical simulation of electromagnetic wave propagation through the shock layer around a blunt-nosed body. Abstract. Preliminary results of numerical simulation of the passage of an electromagnetic wave through the ionized shock layer around a blunt-nosed body in a hypersonic flow are by: 2.

numerical simulations used to characterize the performance of this shock tube. This chapter covers fundamentals of compressible fluids, shock waves and expansion waves in Sectionsandrespectively, operation of a simple shock tube in Sectionresearch objectives in Sectionand the description of the applied.

The reflection of a normal shock wave from the end wall of a two‐dimensional channel has been numerically simulated to investigate the unsteady, viscous interaction aspects of shock bifurcation. The numerical simulation implements a data‐parallel version of the Flux‐Corrected Transport algorithm that has been coupled to the viscous transport terms of the Navier–Stokes by: Investigation of electromagnetic wave propagation in plasma by shock tube Article (PDF Available) in Acta Mechanica Sinica 20(3) June.

Numerical simulations of the interaction of a shock with either a single vortex or a vortex pair are used to investigate the resulting shock structure and the production of acoustic waves.

The results include the interaction of a shock (M =) with a strong vortex which has a peak velocity equal to the velocity of the fluid behind the shock. In order to get the attenuation of the electromagnetic wave through the plasma behind a shock wave, the microwave transmission has been used to measure the relative change of the wave power.

The working frequency is f = (2∼35) GHz (ω=2π f, wave length λ=15 cm ∼ 8 mm). The electron density in the plasma is n e = (3×10 10 ∼1×10 14) cm − by: 9.

The numerical simulation shows that this phenomenon can be explained by the generation of a packet of ion acoustic waves under the action of high-energy electron flows in a collisionless plasma.

In this paper, we present the design and optimization of an electromagnetic generator, able to produce strong shocks in noble gases, relevant to astrophysical conditions. It is a powerful accelerating device which ejects a quasi-planar plasma sheath out of a set of coaxial conical electrodes where a pulsed kA current is : Jean Larour, Raj Laxmi Singh, Chantal Stehlé, Andrea Ciardi, Uddhab Chaulagain, Francisco Suzuki-Vid.

PLASMA HEATING BY STRONG SHOCK WAVES in the inverse pinch by V l a ~ e and~in a coaxial electromagnetic shock s~ tube by R u d d e r ~ w. ~ ~ Optical Instrumentation. Since the plasma produced in the electromagnetic shock tube emits copious radiation, a great deal of effort has been devoted to analyzing that by: 2.

Electromagnetic Wave Simulation in Fusion Plasmas O. Meneghini*, S. Shiraiwa MIT-Plasma Science and Fusion Center *Corresponding author: 77 Massachusetts Avenue, [email protected] Abstract: COMSOL has been used to model the propagation of electromagnetic waves in fusion plasmas.

For the first time, a finite element method has been used to solve the wave. A pulsed-plasma jet actuator is used to control the unsteady motion of the separation shock of a shock wave/boundary layer interaction formed by a compression ramp in a Mach 3 flow. The actuator is based on a plasma-generated synthetic jet and is configured as an array of three jets that can be injected normal to the cross-flow, pitched, or pitched and by: Shock waves—Phenomenology, experimental, and numerical simulation spallation zones around the central pits are caused by shock waves that propagated radially from the impact site.

In the case of a thin glass pane (Fig. 8), the shock wave produces a nearly regularly shaped radial and concentric crack system over the entire target.

Numerical simulation. Because the laser action time is very short, and the forming process of the foil can not be observed directly, it is necessary to analyze the laser shock hydraulic microforming process and various phenomena during the process for better understanding of this technology by numerical simulation.

The shock tube is an instrument used to replicate and direct blast waves at a sensor or a model in order to simulate actual explosions and their effects, usually on a smaller scale. Shock tubes can also be used to study aerodynamic flow under a wide range of temperatures and pressures that are difficult to obtain in other types of testing facilities.

Shock tubes are also used to. at the acceleration of shock waves in weakly ionized argon plasmas. A glow discharge plasma was used in this study, with an electron density, ne, of cm -3, neutral density, no cm -3, and electron temperature, Te-1 - 3 eV.

The pre-plasma shock speeds ranged from about m/s to m/s. The. precursor heating of the electrons ahead of the shock (left of the shock in Fig. Electron-ion coupling serves to equilibrate the electron and ion temperatures away from the shock.

Shock Wave Structure for an Ionized Plasma Thomas O. Masser, John G. 2:Ar mixtures was analyzed in experiments using a shock tube with a discharge cell. Ignition delay time was measured behind a reflected shock wave after a high-voltage nanosecond discharge and in its absence.

Numerical simulation was used to show the main mechanisms that lead to peculiarities of ignition properties of C 2-hydrocarbons. Shock Tube Characteristics Figure 3 shows the shock tube system at Temple Biome-chanics Laboratory.

The shock tube has a diameter of 50mm with a mm-long driver and a mm-long driven, separated by a membrane of varying thickness to produce shocks with different strengths. The pressure in the driver section is gradually increased by an. When a supersonic jet flies by, a sonic boom is produced.

The booming sound is a shock wave. Shock waves occur in other situations as well, such as in plasma. Shock waves produce damage.

Its.They USE shock waves for chemical kinetics studies, for materials studies, and smashing kidney stones; they STUDY the phenomena associated with flows involving shock waves, such as supersonic flow, explosions, detonations, volcanic eruptions, and, in this symposium, even such with-it topics as impact of Shoemaker-Levy on Jupiter and blast waves.