The instability mechanisms and mixing enhancement arising from the interaction of a compressible vortex ring with a normal shock wave were studied in a colinear, dual-shock tube. This flow geometry simulates features of the interaction of a shock wave with a jet containing streamwise vorticity, a configuration of significant interest for supersonic combustion applications. Flow visualization an...

BACKGROUND Paraplegia following spinal cord ischemia represents a devastating complication of both aortic surgery and endovascular aortic repair. Shock wave treatment was shown to induce angiogenesis and regeneration in ischemic tissue by modulation of early inflammatory response via Toll-like receptor (TLR) 3 signaling. In preclinical and clinical studies, shock wave treatment had a favorable ...

Extracorporeal shock wave lithotripsy treatment with Dornier HM3 or MPL 9000 machines was applied in 37 patients with problematic bile duct stones. General anaesthesia was not required. After one extracorporeal shock wave lithotripsy session 14/37 patients (38%) were spontaneously stone free, and additional endoscopic extraction (eight of 37) and retreatments with extracorporeal shock wave lith...

Research on shock wave mitigation in channels has been a topic of much attention in the shock wave community. One approach to attenuate an incident shock wave is to use obstacles of various geometries arranged in different patterns. This work is inspired by the study from Chaudhuri et al. (2013), in which cylinders, squares and triangles placed in staggered and non-staggered subsequent columns ...

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. The method has proven to be an efficient and inexpensive tool for approximately analyzing the focusing of weak shock waves, where complex nonlinear wave interactions occur over a large range of physical scales. The...

The acceleration of energetic charged particles at relativistic and nonrelativistic shock waves plays an important role in powering esztablished and potential cosmic TeV-gamma-ray sources as supernova remnants, jets of active galactic nuclei and gamma-ray bursts. We therefore review some recent results on non-relativistic shock acceleretion and describe the current standing of the theory for re...

A new method to measure shock wave unsteadiness is presented. Time-resolved visualizations of the flow field under investigation are obtained using a high-speed schlieren optical system and the motion of the shock wave is determined by means of digital image processing. Information on the shock's unsteadiness is subsequently derived with Fourier analysis. A sample study on shock unsteadiness in...

It is proposed that shock wave dynamics within the gas of a small bubble explain sonoluminescence, the emission of visible radiation. As the bubble radius oscillates, shock waves develop from spherical sound waves created inside the gas bubble. As any such shock propagates toward the center, it strengthens and, upon convergence and subsequent reflection, temperature of gas inside bubble increas...