Results 71 to 80 of about 651,711 (257)

Shock Waves in Weakly Compressed Granular Media [PDF]

, 2013
We experimentally probe nonlinear wave propagation in weakly compressed granular media, and observe a crossover from quasi-linear sound waves at low impact, to shock waves at high impact. We show that this crossover grows with the confining pressure $P_0$, whereas the shock wave speed is independent of $P_0$ --- two hallmarks of granular shocks ...
arxiv   +1 more source

Shock formation for $2D$ quasilinear wave systems featuring multiple speeds: Blowup for the fastest wave, with non-trivial interactions up to the singularity

, 2017
We prove a stable shock formation result for a large class of systems of quasilinear wave equations in two spatial dimensions. We give a precise description of the dynamics all the way up to the singularity.
Speck, Jared
core   +1 more source

Accurate Hugoniots and sound velocities of bismuth under shock compression in the 38-100 GPa range

AIP Advances, 2018
Dynamic compression experiments of bismuth (Bi) in a shock pressure range of 38-100 GPa were conducted using an explosive drive. The time-resolved particle velocity profiles at the Bi/LiF (lithium fluoride) interface and the impact velocities were ...
Feng Xi, Ke Jin, Huayun Geng, Yinghua Li, Ye Tan, Jun Li, Yi Zhang, Lin Zhang, Lingcang Cai, Yi Sun   +9 more
doaj   +1 more source

Is radial extracorporeal shock wave therapy combined with a specific rehabilitation program (rESWT + RP) more effective than sham-rESWT + RP for acute hamstring muscle complex injury type 3b in athletes? Study protocol for a prospective, randomized, double-blind, sham-controlled single centre trial

Journal of Orthopaedic Surgery and Research, 2019
Background Acute injuries of the hamstring muscle complex (HMC) type 3b (interfascicle/bundle-tear) are frequently observed in various sports disciplines both in elite and recreational sport.
Javier Crupnik, Santiago Silveti, Natalia Wajnstein, Alejandro Rolon, Alisa Vollhardt, Peter Stiller, Christoph Schmitz   +6 more
doaj   +1 more source

The distribution of shock waves in driven supersonic turbulence [PDF]

arXiv, 2000
Supersonic turbulence generates distributions of shock waves. Here, we analyse the shock waves in three-dimensional numerical simulations of uniformly driven supersonic turbulence, with and without magnetohydrodynamics and self-gravity. We can identify the nature of the turbulence by measuring the distribution of the shock strengths.
arxiv  

On Reflection of Shock Waves from Boundary Layers [PDF]

, 1952
Measurements of the reflection characteristics of shock waves from a flat surface with a laminar and turbulent boundary layer are presented. The investigations were carried out at Mach numbers from about 1.3 to 1.5 and a Reynolds number of 0.9 x 10^4.
Dhawan, S., Liepmann, H. W., Roshko, A.
core   +1 more source

Triggering Collapse of the Presolar Dense Cloud Core and Injecting Short-Lived Radioisotopes with a Shock Wave. I. Varied Shock Speeds

, 2009
The discovery of decay products of a short-lived radioisotope (SLRI) in the Allende meteorite led to the hypothesis that a supernova shock wave transported freshly synthesized SLRI to the presolar dense cloud core, triggered its self-gravitational ...
Alan P. Boss, Barsony, Bonnor, Boss, Boss, Cameron, Cameron, Cameron, Chevalier, Connelly, Crutcher, Dauphas, Desch, Elizabeth A. Myhill, Ellinger, Foster, Frank, Gaidos, Goswami, Gounelle, Gounelle, Gounelle, Harri A. T. Vanhala, Healey, Hester, Krot, Kudoh, Kunz, Lee, Lee, Leppanen, Looney, MacPherson, Marchenko, McKeegan, McKeegan, Morris, Mouschovias, Nakamura, Nittler, Oey, Ouellette, Patnaude, Poludnenko, Preibisch, Preibisch, Rauscher, Regelous, Sahijpal, Sahijpal, Sandell, Sandra A. Keiser, Sergei I. Ipatov, Shirley, Snider, Stone, Tachibana, Takigawa, Thrane, Trigo-Rodríguez, Truelove, Vanhala, Vanhala, Vanhala, Wadhwa, Wasserburg, Whalen, Williams, Williams, Yokogawa   +69 more
core   +1 more source

Shock wave focusing using geometrical shock dynamics [PDF]

, 1997
A finite-difference numerical method for geometrical shock dynamics has been developed based on the analogy between the nonlinear ray equations and the supersonic potential equation.
Cates, J. E., Sturtevant, B.
core   +1 more source

Pressure Generation from Micro-Bubble Collapse at Shock Wave Loading

Journal of Fluid Science and Technology, 2010
This paper reports the result of a primary experimental and analytical study used to explore a reliable technology that is potentially applicable to the inactivation of micro-creatures contained in ship ballast water.
Akihisa ABE, Kiyonobu OHTANI, Kazuyoshi TAKAYAMA, Shigeru NISHIO, Haruo MIMURA, Minoru TAKEDA   +5 more
doaj   +1 more source

Wave heating from proto-neutron star convection and the core-collapse supernova explosion mechanism [PDF]

, 2020
Our understanding of the core-collapse supernova explosion mechanism is incomplete. While the favoured scenario is delayed revival of the stalled shock by neutrino heating, it is difficult to reliably compute explosion outcomes and energies, which depend
Fuller, Jim, Gossan, Sarah E., Roberts, Luke F.   +2 more
core