| Issue |
EPL
Volume 100, Number 2, October 2012
|
|
|---|---|---|
| Article Number | 24004 | |
| Number of page(s) | 6 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/100/24004 | |
| Published online | 01 November 2012 | |
Compression of matter by hyperspherical shock waves
1 Institute of Laser Engineering, Osaka University - 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
2 ETSI Aeronauticos, Universidad Politecnica de Madrid - 3 Pza Cardenal Cisneros, Madrid 28040, Spain, EU
3 Engineering Department, Graduate School of Ehime University - 3 Bunkyocho, Ehime 790-8577, Japan
Received: 25 August 2012
Accepted: 1 October 2012
A novel compression scheme is proposed, in which hollow targets with specifically curved structures initially filled with uniform matter, are driven by converging shock waves. The self-similar dynamics is analyzed for converging and diverging shock waves. The shock-compressed densities and pressures are much higher than those achieved using spherical shocks due to the geometric accumulation. Dynamic behavior is demonstrated using two-dimensional hydrodynamic simulations. The linear stability analysis for the spherical geometry reveals a new dispersion relation with cut-off mode numbers as a function of the specific heat ratio, above which eigenmode perturbations are smeared out in the converging phase.
PACS: 47.40.Ki – Supersonic and hypersonic flows / 52.35.Tc – Shock waves and discontinuities
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.