Results 261 to 270 of about 284,202 (303)

Near-Wall Measurements and Wall Shear Stress

2011
The near wall region in turbulent boundary layer flows is important for many reasons and is at the focus of many investigations. It is however very difficult to study this region experimentally, partly because of strong demands on spatial resolution, but also because the presence of the wall influences the performance of the measurements.
openaire   +1 more source

High Wall Shear Stress and Positive Wall Shear Stress Gradient Trigger the Initiation of Intracranial Aneurysms

ASME 2009 Summer Bioengineering Conference, Parts A and B, 2009
While the pathogenesis of an intracranial aneurysm (IA) is poorly understood, it has been generally postulated to be related to hemodynamic insult. IAs are predominantly located at apices of arterial bifurcations or outer curves on or near the Circle of Willis, suggesting a potential role of the specific hemodynamics at such locations characterized by ...
Eleni Metaxa, Markus Tremmel, Jianping Xiang, John Kolega, Max Mandelbaum, Adnan Siddiqui, J. Mocco, Hui Meng   +7 more
openaire   +1 more source

Unsteady wall shear stress in a distensible tube

Journal of Biomechanics, 1991
An asymptotic expression of the wall shear stress (WSS) in an elastic tube is deduced for small values of the Womersley parameter. In the case of a rigid tube this asymptotic expression is shown to compare better with the exact solution than Poiseuille's or Lambossy's approximations.
M, Zagzoule, J, Khalid-Naciri, J, Mauss
openaire   +2 more sources

The stress distribution in a shear wall

1970
This thesis deals mainly with a prototype test performed on an eight storey shear wall. The dynamic stress distribution, obtained from the prototype wall as the building was being shaken, is compared with results obtained both from a finite element analysis and from a photoelastic model study of the shear wall.
openaire   +2 more sources

Shear Stress in Thin‐Walled Tubes

Aircraft Engineering and Aerospace Technology, 1939
THE shear stress in thin‐walled tubes is often a design criterion and considerable weight economy can be effected by an exact stress determination. The problem has been investigated by D. Williams, and the principle is here elaborated and extended to form a practical and very general method which enables many types of structure to be dealt with, such ...
openaire   +1 more source

Measuring Wall Shear Stress Using Velocity-Encoded MRI

Current Cardiovascular Imaging Reports, 2014
This study reviews the application of velocity-encoded magnetic resonance imaging (MRI) for the calculation of wall shear stress (WSS). The basics of velocity-encoded MRI and WSS are reviewed and calculation methods for estimation of the WSS from 2D or 3D (cine) velocity-encoded MRI data are presented. In recent years, there has been a trend towards 3D
Potters, Wouter V., Marquering, Henk A., VanBavel, Ed, Nederveen, Aart J.   +3 more
openaire   +2 more sources

Wall Shear Stress Estimates in Coronary Artery Constrictions

Journal of Biomechanical Engineering, 1992
Wall shear stress estimates from laminar boundary layer theory were found to agree fairly well with the magnitude of shear stress levels along coronary artery constrictions obtained from solutions of the Navier Stokes equations for both steady and pulsatile flow.
L H, Back, D W, Crawford
openaire   +2 more sources

The Measurement of Wall Shear Stress

1989
Knowledge of the wall shear stress is of both fundamental and practical importance. The mean stress is indicative of the overall state of the flow over a given surface while the fluctuating stress is a “footprint” of the individual processes that transfer momentum to the wall.
openaire   +1 more source

Architecture of the dynamic fungal cell wall

Nature Reviews Microbiology, 2022
Neil A R Gow, Megan D Lenardon
exaly  

Wall Shear Stress

2022
openaire   +1 more source