Results 31 to 40 of about 284,202 (303)

Large-eddy simulation and wall modelling of turbulent channel flow [PDF]

, 2009
We report large-eddy simulation (LES) of turbulent channel flow. This LES neither resolves nor partially resolves the near-wall region. Instead, we develop a special near-wall subgrid-scale (SGS) model based on wall-parallel filtering and wall-normal ...
Chung, D., Pullin, D. I.
core   +1 more source

Channelling optics for high quality imaging of sensory hair [PDF]

, 2012
A long distance microscope (LDM) is extended by a lens and aperture array. This newly formed channelling LDM is superior in high quality, high-speed imaging of large field of views (FOV).
Born M., Brian S., C. Brücker, C. Skupsch, Conrady A. E., Geary J. M., H. Chaves, Hsiao F. B., Schlichting H., T. Klotz   +9 more
core   +1 more source

Integrating particle tracking with computational fluid dynamics to assess haemodynamic perturbation by coronary artery stents.

PLoS ONE, 2022
AimsCoronary artery stents have profound effects on arterial function by altering fluid flow mass transport and wall shear stress. We developed a new integrated methodology to analyse the effects of stents on mass transport and shear stress to inform the
Luke Boldock, Amanda Inzoli, Silvia Bonardelli, Sarah Hsiao, Alberto Marzo, Andrew Narracott, Julian Gunn, Gabriele Dubini, Claudio Chiastra, Ian Halliday, Paul D Morris, Paul C Evans, Perrault C M   +12 more
doaj   +1 more source

Thinner Regions of Intracranial Aneurysm Wall Correlate with Regions of Higher Wall Shear Stress: A 7T MRI Study [PDF]

, 2016
BACKGROUND AND PURPOSE: Both hemodynamics and aneurysm wall thickness are important parameters in aneurysm pathophysiology. Our aim was to develop a method for semi-quantitative wall thickness assessment on in vivo 7T MR images of intracranial aneurysms ...
Blankena, R., Haken, B. ten, Kleinloog, R., Luijten, P.R., Ooij, P. van, Rinkel, G.J.E., Verweij, B.H., Zwanenburg, J.J.M.   +7 more
core   +5 more sources

Influence of Back-Support Shear Wall for Shield Launching on the Mechanical Characteristics of the Reaction Frame

Chengshi guidao jiaotong yanjiu
Objective Due to the limited space available at the shield launching site, the restricted size of the reaction frame cannot provide sufficient shield launching reaction force on its own.
WEI Chi, ZHANG Yazhou, YAO Zhanhu, FAN Zhenyu, XU Yunlong, Wang Sheng   +5 more
doaj   +1 more source

Shear stress in smooth trapezoidal channel [PDF]

علوم و مهندسی آبیاری, 2009
Laboratory experiments were conducted in smooth trapezoidal channel with side slope 1:1 to measure boundary force and shear stress. Preston tube is used to estimate contribution of wall and bed shear stresses.
Arash Jael, Manoochehr Fathi Moghadam, Mahmood Bina, Mehdi Ghomeshi, Babak Lashkarara   +4 more
doaj   +1 more source

Decreased rotational flow and circumferential wall shear stress as early markers of descending aorta dilation in Marfan syndrome: a 4D flow CMR study

Journal of Cardiovascular Magnetic Resonance, 2019
Background Diseases of the descending aorta have emerged as a clinical issue in Marfan syndrome following improvements in proximal aorta surgical treatment and the consequent increase in life expectancy. Although a role for hemodynamic alterations in the
A. Guala, G. Teixido-Tura, L. Dux-Santoy, C. Granato, A. Ruiz-Muñoz, F. Valente, L. Galian-Gay, L. Gutiérrez, T. González-Alujas, K. M. Johnson, O. Wieben, A. Sao Avilés, A. Evangelista, J. Rodriguez-Palomares   +13 more
doaj   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Unsteady polar fluid model of blood flow through tapered ω-shape stenosed artery: Effects of catheter and velocity slip

Ain Shams Engineering Journal, 2015
In this paper, we considered the pulsatile flow of blood through catheterized tapered artery in the presence of an ω-shaped stenosis. Blood flow is modelled as homogeneous incompressible couple stress fluid.
D. Srikanth, J.V. Ramana Reddy, Shubha Jain, Anup Kale   +3 more
doaj   +1 more source

Effects of size and elasticity on the relation between flow velocity and wall shear stress in side-wall aneurysms: A lattice Boltzmann-based computer simulation study.

PLoS ONE, 2020
Blood flow in an artery is a fluid-structure interaction problem. It is widely accepted that aneurysm formation, enlargement and failure are associated with wall shear stress (WSS) which is exerted by flowing blood on the aneurysmal wall.
Haifeng Wang, Timm Krüger, Fathollah Varnik   +2 more
doaj   +1 more source