Influence of real gas effects on ablative Rayleigh-Taylor instability in plastic target

Fan, Zhengfeng; Xue, Chuang; Wang, Lifeng; Ye, Wenhua; Zhu, Shaoping
June 2011
Physics of Plasmas;Jun2011, Vol. 18 Issue 6, p062108
Academic Journal
In this research, real gas effects on ablative Rayleigh-Taylor instability are investigated in a plastic target. The real gas effects are included by adopting the quotidian equation of state (QEOS) model. Theoretical solutions for both QEOS and ideal gas EOS are obtained and compared, based on a same set of ablation parameters. It is found that when real gas effects are considered, the density gradient becomes less steep than that of ideal gas assumption, even though this cannot be used directly to draw a stabilization conclusion for the real gas effects. Further analysis shows that when real gas effects are considered, lower ∂p/∂T in the dense shell region has the effect of stabilization, whereas the dependence of the internal energy on the density, lower specific heat (at constant volume) in the dense shell region, and higher specific heat in the low-density ablation region contribute to stronger destabilization effects. Overall, when real gas effects are considered, the destabilization effects are dominant for long wavelength perturbations, and the growth rates become much higher than the results of ideal gas assumption. In our specific case, the maximum relative error reaches 18%.


Related Articles

  • Oscillatory accelerations on gas-liquid systems. Wunenburger, Re´gis; Beysens, Daniel; Lecoutre-Chabot, Carole; Garrabos, Yves; Evesque, Pierre; Fauve, Stephan // AIP Conference Proceedings;2000, Vol. 504 Issue 1, p821 

    We study the stability of liquid-gas interfaces with small density difference, subjected to high frequency vibrations (∼60 Hz). We used CO[sub 2] slightly below its critical point in order to vary in a scaled way the density difference and interfacial tension of the vapor and liquid via...

  • Rayleigh–Taylor stability for a normal shock wave–density discontinuity interaction. Fraley, Gary // Physics of Fluids (00319171);Feb86, Vol. 29 Issue 2, p376 

    The solution for the perturbation growth of a shock wave striking a density discontinuity at a material interface is developed. The Laplace transformation of the perturbation results in an equation which has a simple solution for weak shock waves. The solution for strong shock waves may be given...

  • Critical layer thicknesses for inclined dislocation stability in multilayer structures. Feng, Xiaoxin; Hirth, J. P. // Journal of Applied Physics;8/15/1992, Vol. 72 Issue 4, p1386 

    Studies the critical thickness for stability of dislocations on glide planes inclined to the interfaces in a strained-layer structure. Information on the coherency strain field of critical layers; Determination of coherency energy; Results of the study.

  • On the Stability of the Direct Elimination Method for Equality Constrained Least Squares Problems. Galligani, E.; Zanni, L. // Computing;2000, Vol. 64 Issue 3, p263 

    A backward error analysis of the direct elimination method for linear equality constrained least squares problems is presented. It is proved that the solution computed by the method is the exact solution of a perturbed problem and bounds for data perturbations are given. The numerical stability...

  • Perturbation Growth and Structure in Uncertain Flows. Part I. Farrell, Brian F.; Ioannou, Petros J. // Journal of the Atmospheric Sciences;9/15/2002, Vol. 59 Issue 18, p2629 

    Perturbation growth in uncertain systems is examined and related to previous work in which linear stability concepts were generalized from a perspective based on the nonnormality of the underlying linear operator. In this previous work the linear operator, subject to an initial perturbation or a...

  • From weak to strong pinning I: A finite size study. Tanguy, A.; Vettorel, T. // European Physical Journal B -- Condensed Matter;Mar2004, Vol. 38 Issue 1, p71 

    We have used linear stability analysis to study the depinning of an elastic chain with long range interactions submitted to a random pinning potential. In this paper, we provide, for the first time, evidence of a pronounced change from a strong pinning regime to a weak pinning regime. This...

  • Experimental investigation of Richtmyer-Meshkov instability before and after the reflected... Jourda, G.; Houas, L. // Physics of Fluids;Jun96, Vol. 8 Issue 6, p1353 

    Presents results of an experimental investigation on the Richtmyer-Meshkov instability of a helium-carbon dioxide interface. Method used; Carbon dioxide density profiles; Perturbation of the wall boundary layer that reflected shock interaction.

  • Morphological stability of a heterophase interface under electromigration conditions. Klinger, L.; Levin, L.; Srolovitz, D. // Journal of Applied Physics;5/1/1996, Vol. 79 Issue 9, p6834 

    Examines the evolution of the interface between two mutually insoluble metallic phases under the influence of a strong electric field. Discussion on interface diffusional flux; Analysis on the temporal evolution of a small, sinusoidal perturbation to the interface profile.

  • MODELING TURBULENT MIXING. Baolian Cheng; Glimm, J.; Sharp, D. H.; Lim, H. // AIP Conference Proceedings;2012, Vol. 1426 Issue 1, p1611 

    Fluid mixing is an important phenomenon in many physical applications from supernova explosions to genetic structure formations. Moving interfaces between distinct fluids in a multi-fluid system are often unstable. Small perturbations at such interfaces grow as a result of nonlinear hydrodynamic...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics