Shock Waves
Mostrando 25-36 de 56 artigos, teses e dissertações.
-
25. Analysis of time-resolved laser plasma ablation using an imaging spectra technique
Pulsed laser deposition (PLD) is extensively employed for the growth of thin films. The laser-material interaction involves complex processes of heating, melting, vaporization, ejection of atoms, ions and molecules, shock waves, plasma initiation, expansion and deposition onto a substrate. The understanding of the spatial and temporal distribution of a plasm
Brazilian Journal of Physics. Publicado em: 2007-12
-
26. Jet quenching measurements at RHIC
Experimental observation of jet quenching in ultra-relativistic heavy-ion collisions is one of the most remarkable discoveries at RHIC. High-pT hadron suppression, disappearance of back-to-back jets, and strong away-side modification at intermediate to low pT have provided us many insights into the matter created at RHIC. Particularly, angular correlations h
Braz. J. Phys.. Publicado em: 2007-06
-
27. Ondas de Choques Transicionais Para Modelos Quadráticos de Duas Leis de Conservação / Transitional shocks waves for quadratic models of two conservation laws
Transitional shock waves arises in solution of initial values problems for non linear systems of conservation laws that are not strictly hyperbolic. These waves are discontinuous solutions that posses viscous profile but do not conform to the Lax characteristic criterion, where inequalities between the shock propagation speed and the characteristic speeds mu
Publicado em: 2007
-
28. Transitional shocks waves for quadratic models of two conservation laws / Ondas de Choques Transicionais Para Modelos Quadráticos de Duas Leis de Conservação
Transitional shock waves arises in solution of initial values problems for non linear systems of conservation laws that are not strictly hyperbolic. These waves are discontinuous solutions that posses viscous profile but do not conform to the Lax characteristic criterion, where inequalities between the shock propagation speed and the characteristic speeds mu
Publicado em: 2007
-
29. Classification of homogeneous quadratic conservation laws with viscous terms
In this paper, we study systems of two conservation laws with homogeneous quadratic flux functions. We use the viscous profile criterion for shock admissibility. This criterion leads to the occurrence of non-classical transitional shock waves, which are sensitively dependent on the form of the viscosity matrix. The goal of this paper is to lay a foundation f
Computational & Applied Mathematics. Publicado em: 2007
-
30. Advanced turbulence modelling for complex aerospace applications.
The objective of the present research work consists in studying complex aerodynamic flows about typical aerospace configuration, in which turbulence effects play a fundamental role. Such study is performed with an available computational tool that is being developed at CTA/IAE. This is a finite-volume code for unstructured 3-D meshes that solves the compress
Publicado em: 2007
-
31. Movimento bidirecional no transporte intracelular mediado por motores moleculares / Bidirectional movement in the intracellular transport mediated by molecular motors
In this work we present a theoretical model to describe aspects of the bidirectional movement performed by intracellular structures (vesicles, organelles, viruses etc, to which we refer here simply as "vesicles"), observed essentially at in vivo experiments. This nondifusive movement is characterized by rapid inversions in direction and is capable of creatin
Publicado em: 2007
-
32. "Dusty Plasmas: stellar winds and the interstellar medium" / "Plasmas empoeirados: ventos estelares e o meio interestelar"
In this work, we firstly discuss the propagation of Alfvén waves in dusty plasmas found in several astrophysical environments. The wave dispersion relation is modified giving rise to new damping mechanisms. There are in the literature observational data indicating the presence of dust near the surface of cool giant and supergiant stars. We developed a stell
Publicado em: 2005
-
33. Estudo experimental da evaporação de jatos de iso-octano superaquecido. / Experimental study of evaporating jets of superheated iso-octane.
The main goal of this thesis is to present results of experiments with flashing liquid jets of iso-octane. The experiments were carried out with a liquid jet issuing from a small nozzle into a low-pressure chamber. High degrees of metastability were obtained as the liquid jet expanded within the nozzle. Injection pressure and temperature were controlled to t
Publicado em: 2005
-
34. Descontinuidade e ondas de choque em escoamento de gás contendo gotículas / Discontinuities and shock waves in the flow of gas containg droplets
Apresentamos neste trabalho, através do estudo teórico, o equacionamento matemático dos fenômenos das descontinuidades e ondas de choque em escoamento de um gás contendo gotículas, para diferentes regimes e sua dependência de alguns parâmetros não dimensionais, baseados na concentração do líquido na mistura. Aplicando o método utilizado por Jeff
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/04/2004
-
35. Effects of high-energy shock wave on organs adjacent to the kidney in the growing rat
OBJECTIVE: To assess the effects of high-energy shock waves (HESW) on organs adjacent to the kidney, in the growing rat. MATERIALS AND METHODS: We studied 60 Wistar male rats. Upon completing 30 days of age, a radiopaque marker was placed in the animals' left renal cavity. With 40 days of age, after radiologically confirming the markers' position, the rats w
International braz j urol. Publicado em: 2004-04
-
36. Effect of shock wave reapplication on urinary n-acetyl-beta-glucosaminidase in canine kidney
OBJECTIVE: Renal tubular damage can be assessed with the aid of urinary dosing of N-acetyl-beta-glucosaminidase (NAG) and it is possible to demonstrate a significant correlation between shock wave and damage to renal parenchyma. The objective of this study was to assess the effect of shock wave reapplication over urinary NAG in canine kidney. MATERIALS AND M
International braz j urol. Publicado em: 2004-04