Prediction of Shock Wave Structure in Weakly Ionized Gas Flow

2002 ◽  
Author(s):  
Zt Deng ◽  
Ruben Rojas-Oviedo ◽  
Alan Chow ◽  
Ron Litchford
Keyword(s):  
Shock Wave ◽  
Gas Flow ◽  
Wave Structure ◽  
Shock Wave Structure ◽  
Ionized Gas ◽  
Weakly Ionized

Influence Of The Variable Parameters Jet Flowing Through The Slit On The Supersonic Gas Flow In The Expanding Channel

2015 ◽  
Vol 10 (3) ◽  
pp. 26-30
Author(s):  
Vladimir Zamuraev ◽  
Anna Kalinina
Keyword(s):  
Shock Wave ◽  
Gas Flow ◽  
Wave Structure ◽  
Supersonic Stream ◽  
Narrow Slit ◽  
Shock Wave Structure ◽  
Gas Generator ◽  
Variable Parameters ◽  
Supersonic Gas Flow ◽  
Expanding Channel

Influence of the jet flowing from a gas generator through a narrow slit on shock-wave structure of a stream in the channel of variable section is investigated. Influence of the size of a jet, density and speed of gas on an entrance, and also influence of oscillations of parameters of a jet is studied. Possibility of management of a supersonic stream of shock-wave structure in the channel with the help pulse and periodic an energy supply before a jet is investigated at negative feedback on pressure.

Switch-shock wave structure in a magnetized partly-ionized gas

1975 ◽  
Vol 14 (2) ◽  
pp. 333-346 ◽  
Author(s):  
N. F. Cramer
Keyword(s):  
Magnetic Field ◽  
Shock Wave ◽  
Wave Structure ◽  
High Resistivity ◽  
Shock Wave Structure ◽  
Ionized Gas ◽  
Heavy Particles ◽  
Neutral Gas ◽  
Shock Transition ◽  
The Magnetic Field

The effect of the interaction of plasma and neutral gas on the structure of switchtype shock waves propagating in a partly-ionized gas is studied. These shocks, in which the magnetic field is perpendicular to the shock front either upstream or downstream, exhibit a spiralling behaviour of the magnetic field in the shock transition region, if the Hall term is important in the Ohm's law. Observation of this behaviour for shocks propagating into a plasma with a residual neutral content of ~ 15 % has implied an anomalously high resistivity of the plasma. We show that this can be partly explained by considering the collisions of ions with the neutral atoms in a magnetic field. We show that the extra dissipation due to the increase in resistivity goes primarily to the ions and neutrals. Thus even in the absence of viscous dissipation within each species, the heavy particles can be appreciably heated in a shock propagating into a partly-ionized gas in a magnetic field.

scholarly journals Nematic Dispersive Shock Waves from Nonlocal to Local

2021 ◽  
Vol 11 (11) ◽  
pp. 4736
Author(s):  
Saleh Baqer ◽  
Dimitrios J. Frantzeskakis ◽  
Theodoros P. Horikis ◽  
Côme Houdeville ◽  
Timothy R. Marchant ◽  
...  
Keyword(s):  
Shock Wave ◽  
Liquid Crystals ◽  
Shock Waves ◽  
Numerical Solutions ◽  
Wave Structure ◽  
Beam Power ◽  
Input Beam ◽  
Shock Wave Structure ◽  
Wave Solutions ◽  
Modulation Theory

The structure of optical dispersive shock waves in nematic liquid crystals is investigated as the power of the optical beam is varied, with six regimes identified, which complements previous work pertinent to low power beams only. It is found that the dispersive shock wave structure depends critically on the input beam power. In addition, it is known that nematic dispersive shock waves are resonant and the structure of this resonance is also critically dependent on the beam power. Whitham modulation theory is used to find solutions for the six regimes with the existence intervals for each identified. These dispersive shock wave solutions are compared with full numerical solutions of the nematic equations, and excellent agreement is found.

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