scholarly journals Steady Shock Refraction in Hypersonic Ramp Flow

2011 ◽  
Author(s):  
Daniel Banuti ◽  
Klaus Hannemann
Keyword(s):  
Shock Refraction ◽  
Steady Shock

Radiative and Hydrodynamical Model of a Steady Shock Wave in Atomic Hydrogen

2009 ◽  
Author(s):  
Giuliano D'Ammando ◽  
Daniela Pietanza ◽  
Gianpiero Colonna ◽  
Savino Longo ◽  
Mario Capitelli
Keyword(s):  
Shock Wave ◽  
Atomic Hydrogen ◽  
Hydrodynamical Model ◽  
Steady Shock

scholarly journals Vertical Structure of Spiral Shocks in a Corrugated Galactic Disc

1983 ◽  
Vol 100 ◽  
pp. 145-146
Author(s):  
A. H. Nelson ◽  
T. Matsuda ◽  
T. Johns
Keyword(s):  
Density Profile ◽  
Vertical Velocity ◽  
Gas Flow ◽  
Vertical Structure ◽  
Vertical Motion ◽  
Shock Structure ◽  
Galactic Disc ◽  
Gaussian Density ◽  
Abundant Evidence ◽  
Steady Shock

Numerical calculations of spiral shocks in the gas discs of galaxies (1,2,3) usually assume that the disc is flat, i.e. the gas motion is purely horizontal. However there is abundant evidence that the discs of galaxies are warped and corrugated (4,5,6) and it is therefore of interest to consider the effect of the consequent vertical motion on the structure of spiral shocks. If one uses the tightly wound spiral approximation to calculate the gas flow in a vertical cut around a circular orbit (i.e the ⊝ -z plane, see Nelson & Matsuda (7) for details), then for a gas disc with Gaussian density profile in the z-direction and initially zero vertical velocity a doubly periodic spiral potential modulation produces the steady shock structure shown in Fig. 1. The shock structure is independent of z, and only a very small vertical motion appears with anti-symmetry about the mid-plane.

The structure of steady shock waves in porous metals

2017 ◽  
Vol 107 ◽  
pp. 204-228 ◽  
Author(s):  
Christophe Czarnota ◽  
Alain Molinari ◽  
Sébastien Mercier
Keyword(s):  
Shock Waves ◽  
Porous Metals ◽  
Steady Shock

scholarly journals Regular shock refraction at an oblique planar density interface in magnetohydrodynamics

2005 ◽  
Vol 522 ◽  
pp. 179-214 ◽  
Author(s):  
V. WHEATLEY ◽  
D. I. PULLIN ◽  
R. SAMTANEY
Keyword(s):  
Density Interface ◽  
Shock Refraction

scholarly journals Steady shock waves in porous metals: Viscosity and micro-inertia effects

2020 ◽  
Vol 135 ◽  
pp. 102816
Author(s):  
Christophe Czarnota ◽  
Alain Molinari ◽  
Sébastien Mercier
Keyword(s):  
Shock Waves ◽  
Porous Metals ◽  
Inertia Effects ◽  
Steady Shock

scholarly journals One Dimensional Shock Refraction at a Plasma-cold Gas Interface

1973 ◽  
Vol 28 (10) ◽  
pp. 1668-1675
Author(s):  
J. Gerofi ◽  
H. K. Messerle
Keyword(s):  
Plasma Temperature ◽  
Region Of Interest ◽  
Initial Pressure ◽  
Step Function ◽  
Initial Plasma ◽  
Function Discontinuity ◽  
Definition Of ◽  
Shock Refraction ◽  
Weak Shocks ◽  
Cold Gas

Refraction and reflection of a shockwave at a plasma/cold gas interface has been studied using an R.F. preheated section in an electrothermal shock tube. The gas used in the experiment was Argon at initial pressures from 10 to 30 Torr, with initial temperature of 9000 K.A detailed numerical analysis of the refraction event has been undertaken using a method that does not require definition of an effective γ. Methods that do use such a γ are not accurate, except for very weak shocks. Because of short ionization times it has been possible to assume equilibrium behind the various shock waves. Calculations suggest that in the region of interest, reflected and refracted shock velocities depend primarily on initial shock velocity, slightly on initial plasma temperature and very weakly on initial pressure. The analysis covers initial temperatures of 6000 to 12 000 K and initial pressures of 10 to 50 Torr.Calculations and experimental results are presented. These show that a step function discontinuity is a good approximation to the nature of the plasma cold gas interface in this situation.

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