نتایج جستجو برای: laminar shear box
تعداد نتایج: 168652 فیلتر نتایج به سال:
Pulsatile non-Newtonian blood flow in an idealized vessel is numerically investigated. The CarreauYasuda model is used to account for the shear-thinning viscosity of blood. For validation purposes, we have used two numerical methods: a mesoscopic lattice-Boltzmann equation and a standard finite element solver. Good agreement for the velocity and the shear stress has been obtained from the two a...
In this study, through series of shaking table tests and statistical analysis, the efficiency of Uniform Tuned Liquid Column Damper (UTLCD) in structures resting on loose soils, considering soil-structure interaction was investigated. The soil beneath the structure is loose sandy soil. The Laminar Shear Box (LSB) as a soil container was adopted and the scaled form of the prototype structure nam...
Atherosclerotic disease, and the subsequent complications of thrombosis and plaque rupture, has been associated with local shear stress. In the diseased carotid artery, local variations in shear stress are induced by various geometrical features of the stenotic plaque. Greater stenosis severity, plaque eccentricity (symmetry) and plaque ulceration have been associated with increased risk of cer...
We demonstrate an unexpected connection between isotropic turbulence and wall-bounded shear flows. We perform direct numerical simulations of isotropic turbulence forced at large scales at moderate Reynolds numbers and observe sudden transitions from a chaotic dynamics to a spatially simple flow, analogous to the laminar state in wall bounded shear flows. We find that the survival probabilities...
Oscillatory shear stress occurs at sites of the circulation that are vulnerable to atherosclerosis. Because oxidative stress contributes to atherosclerosis, we sought to determine whether oscillatory shear stress increases endothelial production of reactive oxygen species and to define the enzymes responsible for this phenomenon. Bovine aortic endothelial cells were exposed to static, laminar (...
The seismic response of underground structures such as subway stations is critical. However, the complex structure experiments under a dynamic centrifuge shaking table are significantly limited. This study conducts test two-story three-span 50 g gravitational acceleration to investigate soil–structure interaction effects (SSI). performed on sand soil-structural model using laminar shear box wit...
The vascular endothelium interacts with all types of blood cells and is a key modulator of local and systemic inflammatory processes, for example, in the adhesion of blood leukocytes to endothelial cells (EC) and the following extravasation into the injured tissue. The endothelium is constantly exposed to mechanical forces caused by blood flow, and the resulting shear stress is essential for th...
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