Shear Flow
Shear Flow - Related Videos
09:20
The Assembly and Application of 'Shear Rings': A Novel Endothelial Model for Orbital, Unidirectional and Periodic Fluid Flow and Shear Stress
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Cited by 10 •
2016
Different levels and patterns of fluid shear are known to modulate endothelial gene expression, phenotype and susceptibility to disease. We discuss the assembly and use of 'shear rings': a model that produces unidirectional, periodic shear stress patterns. Shear rings are simple to assemble, economical and can produce high cell yields.
12:43
Parallel-plate Flow Chamber and Continuous Flow Circuit to Evaluate Endothelial Progenitor Cells under Laminar Flow Shear Stress
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Cited by 51 •
2012
We are describing a method to subject adherent cells to laminar flow shear stress in a sterile continuous flow circuit. The cells' adhesion, morphology can be studied through the transparent chamber, samples obtained from the circuit for metabolite analysis and cells harvested after shear exposure for future experiments or culture.
08:01
The Diffusion of Passive Tracers in Laminar Shear Flow
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Cited by 4 •
2018
A protocol for the study of the diffusion of passive tracers in laminar pressure-driven flow is presented. The procedure is applicable to various capillary pipe geometries.
08:47
Characterizing Single-Molecule Conformational Changes Under Shear Flow with Fluorescence Microscopy
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Cited by 1 •
2020
We present a protocol for immobilizing single macromolecules in microfluidic devices and quantifying changes in their conformations under shear flow. This protocol is useful for characterizing the biomechanical and functional properties of biomolecules such as proteins and DNA in a flow environment.
13:28
Introducing Shear Stress in the Study of Bacterial Adhesion
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Cited by 9 •
2011
During the infection process, a key step is the adhesion of pathogens with host cells. In most instances this adhesion step occurs in the presence of mechanical stress generated by flowing liquid. We describe a technique that introduces shear stress as an important parameter in the study of bacterial adhesion.
FAQs
A velocity gradient determines how rapidly fluid velocity changes between adjacent layers, which produces viscous shear stress. Larger differences in velocity over a given distance lead to stronger tangential force transfer within the fluid. Engineers examine this relationship when evaluating deformation, flow behavior, and the stresses developed in fluid systems under operating conditions.
In a thin-walled member, transverse loading produces a shear flow that is distributed around the section rather than concentrated at one point. Its pattern follows the structural load path and can vary along channels, aircraft skins, pipes, and other sections. Evaluating this distribution helps engineers identify how each wall segment contributes to carrying the applied load.
The governing setting changes the way engineers interpret shear flow. In fluids, relative layer motion and a velocity gradient are central, with viscous shear stress describing the tangential transfer. In thin-walled structures, transverse loading is represented as shear force per unit length distributed through the section. Both cases support predictions of deformation and stress, but their load-transfer descriptions differ.
Changing loads can alter the magnitude and distribution of shear flow in a component, affecting both deformation and stress patterns. The response also depends on whether the system is a fluid region or a thin-walled member, because velocity gradients govern the former while transverse loading governs the latter. Tracking these changes is important when assessing performance and possible failure.
An analysis begins by identifying the relevant system, such as a fluid region or a thin-walled structural member, and the loading or motion that creates tangential force transfer. Engineers then evaluate the resulting shear stress or shear force per unit length and examine its distribution. The calculated pattern is used to predict deformation, load paths, and stress concentrations relevant to design.
Shear flow analysis applies to beams, channels, aircraft skins, pipes, and other components that experience fluid motion or transverse loading. It helps engineers understand how forces travel through a structure or fluid system, how deformation develops, and where changing loads may create unfavorable stress conditions. These results support structural safety, flow control, and failure analysis.