scholarly journals The rarefaction wave propagation in transparent windows

2017 ◽  
Author(s):  
B. Glam ◽  
E. Porat ◽  
Y. Horovitz ◽  
A. Yosef-Hai
Keyword(s):  
Wave Propagation ◽  
Rarefaction Wave ◽  
Transparent Windows

Stability of planar rarefaction wave to the 3D bipolar Vlasov–Poisson–Boltzmann system

2019 ◽  
Vol 30 (01) ◽  
pp. 23-104 ◽  
Author(s):  
Shu Wang ◽  
Teng Wang
Keyword(s):  
Wave Propagation ◽  
Boltzmann Equation ◽  
Asymptotic Stability ◽  
Rarefaction Wave ◽  
Stability Result ◽  
Three Dimensions ◽  
Wave Patterns ◽  
Shock Profiles ◽  
Poisson Boltzmann ◽  
Math Phys

We investigate the time-asymptotic stability of planar rarefaction wave for the 3D bipolar Vlasov–Poisson Boltzmann (VPB) system, based on the micro–macro decompositions introduced in [T. P. Liu and S. H. Yu, Boltzmann equation: Micro–macro decompositions and positivity of shock profiles, Comm. Math. Phys. 246 (2004) 133–179; Energy method for the Boltzmann equation, Physica D 188 (2004) 178–192] and our new observations on the underlying wave structures of the equation to overcome the difficulties due to the wave propagation along the transverse directions and its interactions with the planar rarefaction wave. Note that this is the first stability result of basic wave patterns for bipolar VPB system in three dimensions.

Rarefaction wave propagation in a waveguide in a hydrate-containing porous medium

2019 ◽  
Author(s):  
A. A. Gubaidullin ◽  
O. Yu. Boldyreva ◽  
D. N. Dudko
Keyword(s):  
Porous Medium ◽  
Wave Propagation ◽  
Rarefaction Wave

Effect of Tube Banks on Rarefaction Wave Propagation

1982 ◽  
Vol 104 (2) ◽  
pp. 102-111
Author(s):  
D. Squarer ◽  
A. E. Manhardt
Keyword(s):  
Wave Propagation ◽  
Rarefaction Wave ◽  
Steam Generator ◽  
Transmission Loss ◽  
Wave Length ◽  
Scale Model ◽  
Free Jet ◽  
Feed Line ◽  
Tube Banks ◽  
Theoretical Considerations

In a continuing effort to study the effect of steam generator feed line break on steam generator internals, a theoretical and experimental study has been undertaken. This paper summarizes results of a study whose goal is to check the effects of tube rows on rarefaction wave propagation generated by a sudden rupture. The effect of the tubes is presented in terms of measured pressures and strains with and without tubes. Ten rows of tubes are found to cause a transmission loss in the 1:10 steam generator scale model smaller than 689 kPa along the feed line centerline and have little effect away from the centerline, or on the pressure difference across the divider plate. Theoretical considerations include: estimating transmission losses in terms of tube bank geometry, wave length and frequency, and incident pulse; reflection from a free jet, and potential flow solution to the flow field near the pressure vessel-feed line interface.

RELAP5 Analysis of Two-Phase Decompression and Rarefaction Wave Propagation Under a Temperature Gradient

2010 ◽  
Vol 169 (1) ◽  
pp. 34-49 ◽  
Author(s):  
Nathan Lafferty ◽  
Victor Ransom ◽  
Martin Lopez De Bertodano
Keyword(s):  
Wave Propagation ◽  
Temperature Gradient ◽  
Rarefaction Wave ◽  
Two Phase

Rarefaction wave propagation in tapered granular columns

2012 ◽  
Vol 71 ◽  
pp. 32-38 ◽  
Author(s):  
Yin Wang ◽  
Chris M. Wensrich ◽  
Jin Y. Ooi
Keyword(s):  
Wave Propagation ◽  
Rarefaction Wave

Evolution of pressure and temperature upon sudden contact of cold water and saturated steam

2007 ◽  
Vol 5 ◽  
pp. 261-266
Author(s):  
S.I. Lezhnin ◽  
A.L. Sorokin ◽  
N.A. Pribaturin
Keyword(s):  
Wave Propagation ◽  
Rarefaction Wave ◽  
Constant Temperature ◽  
Temperature Difference ◽  
Water Surface ◽  
Cold Water ◽  
Saturated Vapor ◽  
Saturated Steam ◽  
Time Interval ◽  
Steam Condensation

The process of rarefaction wave propagation upon sudden contact of cold water and saturated vapor is studied. It is shown that the most intensive steam condensation occurs over a time interval of about 0.01 ms, during which the water surface heats up. Then a constant temperature difference of 2-3 degrees is formed between the water surface and the steam and thus the condensation intensity is reduced.

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

Use of light microscopy in the qualitative and quantitative study of liquid crystalline order

1992 ◽  
Vol 50 (1) ◽  
pp. 264-265
Author(s):  
Christopher Viney
Keyword(s):  
Light Microscopy ◽  
Liquid Crystalline ◽  
Structural Characteristics ◽  
Molecular Order ◽  
Liquid Crystalline Phases ◽  
Convenient Technique ◽  
Liquid Crystalline Materials ◽  
Transparent Windows

Light microscopy is a convenient technique for characterizing molecular order in fluid liquid crystalline materials. Microstructures can usually be observed under the actual conditions that promote the formation of liquid crystalline phases, whether or not a solvent is required, and at temperatures that can range from the boiling point of nitrogen to 600°C. It is relatively easy to produce specimens that are sufficiently thin and flat, simply by confining a droplet between glass cover slides. Specimens do not need to be conducting, and they do not have to be maintained in a vacuum. Drybox or other controlled environmental conditions can be maintained in a sealed chamber equipped with transparent windows; some heating/ freezing stages can be used for this purpose. It is relatively easy to construct a modified stage so that the generation and relaxation of global molecular order can be observed while specimens are being sheared, simulating flow conditions that exist during processing. Also, light only rarely affects the chemical composition or molecular weight distribution of the sample. Because little or no processing is required after collecting the sample, one can be confident that biologically derived materials will reveal many of their in vivo structural characteristics, even though microscopy is performed in vitro.

Sign in / Sign up

Export Citation Format

Share Document