Influence of the interaction of a shock wave with a region of contact of two fluxes of different density on the rate of mixing

Алешин, А. Н.; Gamalii, E. G.; Zaitsev, S. G.; Lazareva, E.V.; Lebo, I. G.; Розанов, В. Б.

doi:10.1070/qe1987v017n11abeh010939

Cited by 3 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results together with those of Aleshin et al (1990Aleshin et al ( , 1998 and for moderate-and high-Mach number experiments are presented in Figure 1c. As can be seen, the reductions in all of the experiments fit a single curve.…”

Section: High I N I T I a L A M P L I T U D E W I T H S M A L L M A Csupporting

confidence: 81%

High Energy Density Laboratory Astrophysics

Kyrala¹

2005

View full text Add to dashboard Cite

Section: High I N I T I a L A M P L I T U D E W I T H S M A L L M A Csupporting

confidence: 81%

High Energy Density Laboratory Astrophysics

Kyrala¹

2005

View full text Add to dashboard Cite

“…The gases were segregated initially with a solid membrane and its strength may have impeded the instability growth. Similar experiments 13,14 at Mach 3.5 did not have this problem. They found good agreement with theory early in time, but the growth rate decreased when the amplitude became ϳ30% of the wavelength.…”

Section: Introductionsupporting

confidence: 54%

Turbulent Richtmyer–Meshkov instability experiments with strong radiatively driven shocks

Dimonte

Schneider

1997

Physics of Plasmas

View full text Add to dashboard Cite

The Richtmyer-Meshkov instability is investigated in the turbulent regime with strong radiatively driven shocks ͑Mach Ͼ10͒ on the Nova laser ͓Phys. Rev. Lett. 70, 1806 ͑1993͔͒. The targets are planar with near solid density and Atwood number ϳϪ0.9. The interfacial perturbations are three dimensional ͑3-D͒, random, and nonlinear with a broad scale distribution such that they develop into a turbulent mixing zone ͑TMZ͒. The TMZ is diagnosed radiographically using x-ray dopants localized to the center of the target to avoid edge effects. Two different diagnostic configurations yield comparable results. The total width of the TMZ is found to increase in time as Hϳt ⌰ , with ⌰ϳ0.5Ϯ0.1. When compared to shock tube data, this result supports the suggestion ͓Phys. Fluids 8, 614 ͑1996͔͒ that ⌰ decreases with Mach number. The data are used to test turbulence models and to determine the effective drag coefficient C d ϳ2.6Ϯ1.2 for potential flow mix models in the high compression regime.

show abstract

“…Our results together with those of Aleshin et al (1990Aleshin et al ( , 1998 and Dimonte et al (1996) for moderate-and high-Mach number experiments are presented in Figure 1c. As can be seen, the reductions in all of the experiments fit a single curve.…”

Section: High I N I T I a L A M P L I T U D E W I T H S M A L L M A Cmentioning

confidence: 69%

“…Recent theoretical and experimental studies by Aleshin et al (1990Aleshin et al ( , 1997, Dimonte et al (1996) showed that in some cases there is a reduction in the initial growth velocity with respect to the predictions of the linear model (and likewise the nonlinear classical model). In the present investigation combined experimental and theoretical studies reveal two different effects that dominate the instability evolution, the geometric effect and the high-Mach number effect.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, efforts have been made to study the evolution of the Richtmyer-Meshkov instability in the case of high-Mach numbers. Shock-tube experiments were conducted by Aleshin's research group (Aleshin et al, 1990(Aleshin et al, , 1997 using moderate-Mach numbers (2.5-3.5), various initial conditions and different test gas combinations (He-Xe, Ar-Kr, He-Xe in heavy to light and light to heavy arrangements). In their study, an effort was made to map the behavior of the instability and to quantify the differences between the various regimes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Studying Hydrodynamic Instability Using Shock-Tube Experiments

Sadot

Levy

Yosef-Hai

et al. 2005

Astrophys Space Sci

View full text Add to dashboard Cite

The hydrodynamic instability, which develops on the contact surface between two fluids, has great importance in astrophysical phenomena such as the inhomogeneous density distribution following a supernova event. In this event acceleration waves pass across a material interface and initiate and enhance unstable conditions in which small perturbations grow dramatically.In the present study, an experimental technique aimed at investigating the above-mentioned hydrodynamic instability is presented. The experimental investigation is based on a shock-tube apparatus by which a shock wave is generated and initiates the instability that develops on the contact surface between two gases. The flexibility of the system enables one to vary the initial shape of the contact surface, the shock-wave Mach number, and the density ratio across the contact surface.Three selected sets of shock-tube experiments are presented in order to demonstrate the system capabilities: (1) large-initial amplitudes with low-Mach-number incident shock waves;(2) small-initial amplitudes with moderate-Mach-number incident shock waves; and (3) shock bubble interaction.In the large-amplitude experiments a reduction of the initial velocity with respect to the linear growth prediction was measured. The results were compared to those predicted by a vorticity-deposition model and to previous experiments with moderate-and high-Mach number incident shock waves that were conducted by others. In this case, a reduction of the initial velocity was noted. However, at late times the growth rate had a 1/t behavior as in the small-amplitude low-Mach number case. In the small-amplitude moderate-Mach number shock experiments a reduction from the impulsive theory was noted at the late stages.The passage of a shock wave through a spherical bubble results in the formation of a vortex ring. Simple dimensional analysis shows that the circulation depends linearly on the speed of sound of the surrounding material and on the initial bubble radius.

show abstract

Influence of the interaction of a shock wave with a region of contact of two fluxes of different density on the rate of mixing

Cited by 3 publications

References 0 publications

High Energy Density Laboratory Astrophysics

High Energy Density Laboratory Astrophysics

Turbulent Richtmyer–Meshkov instability experiments with strong radiatively driven shocks

Studying Hydrodynamic Instability Using Shock-Tube Experiments

Contact Info

Product

Resources

About