Results 11 to 20 of about 63,723 (218)

Wall shear stress revisited

open access: yesArtery Research, 2009
In vivo measurements of wall shear stress (WSS), a determinant of endothelial cell function and gene expression, have shown that theoretical assumptions regarding WSS in the arterial system and its calculation are invalid. In humans mean WSS varies along
Robert S. Reneman   +2 more
doaj   +1 more source

The Effect of Wall Shear Stress and Viscous Heating on Nanoscale Flow [PDF]

open access: yesPort Said Engineering Research Journal, 2018
The effect of wall shear stress and viscous heating on nano scale flow properties and boundary conditions is presented. Molecular dynamics (MD) simulations is implemented to handle nano scale force-driven Poiseuille flow bounded by two parallel planner ...
Mohamed Elsabahy   +2 more
doaj   +1 more source

Machine Learning-Based Segmentation of the Thoracic Aorta with Congenital Valve Disease Using MRI

open access: yesBioengineering, 2023
Subjects with bicuspid aortic valves (BAV) are at risk of developing valve dysfunction and need regular clinical imaging surveillance. Management of BAV involves manual and time-consuming segmentation of the aorta for assessing left ventricular function,
Elias Sundström, Marco Laudato
doaj   +1 more source

Shear stress fluctuation measurements using an electrochemical method in pipe flow

open access: yesJournal of Fluid Science and Technology, 2019
Wall shear stress fluctuations are measured using an electrochemical method in pipe flow. The relationship between the mass transfer and the momentum transfer, studied by Hanratty and Campbell (1983) and the Chilton–Colburn analogy (Chilton and Colburn ...
Tong TONG   +2 more
doaj   +1 more source

Development of a Flexible MEMS Sensor for Subsonic Flow

open access: yesMicromachines, 2022
Detection and control of flow separation is a key to improving the efficiency of fluid machinery. In this study, we developed a flexible MEMS (microelectromechanical systems) sensor for measuring the wall shear stress and flow angle in subsonic airflow ...
Koichi Murakami   +7 more
doaj   +1 more source

Low wall shear stress predicts subsequent development of wall hypertrophy in lower limb bypass grafts

open access: yesArtery Research, 2009
Background: Venous grafts commonly develop myointimal hyperplasia, which can lead to stenoses and, ultimately, with expression of adhesion molecules, lumenal occlusion.
Mark Jackson   +8 more
doaj   +1 more source

Accurate Measurements of Wall Shear Stress on a Plate with Elliptic Leading Edge

open access: yesSensors, 2018
A micro-floating element wall shear stress sensor with backside connections has been developed for accurate measurements of wall shear stress under the turbulent boundary layer.
Guang-Hui Ding   +4 more
doaj   +1 more source

Study on the effects of failed soil block upon the hydraulic characteristics of sharp bend

open access: yesShui kexue jinzhan, 2022
For the composite riverbank, the continuous erosion of the lower non-cohesive layer results in the failure of upper cohesive layer. The cohesive soil block deposits at bank toe, which can alter the flow structure and the following erosion process in the ...
Zhuoliang ZHOU   +4 more
doaj   +1 more source

On the measurement of wall shear stress with a patch-type micro-fabricated hot-film sensor

open access: yesJournal of Fluid Science and Technology, 2014
In this study, a new patch-type hot-film sensor is devised to measure wall shear stress, and its measurement accuracy is validated. The sensor consists of heaters on a thin polyimide film and a flexible printed circuit.
Takuya SAWADA   +6 more
doaj   +1 more source

Modeling of methane formation in gravity sewer system: the impact of microorganism and hydraulic condition

open access: yesAMB Express, 2018
Sewer system is an important source of methane formation and emission. Although some models were developed to predict methane production in sewers, the impact of microorganism amount was indicated indirectly.
Jingwei Xu   +5 more
doaj   +1 more source

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