Hemolysis due to Surface Roughness under Shear Flow Field

A ferrofluid is a suspension of ferromagnetic spherical particles in a base liquid (1), and is well known as a functional fluid which responds to an external magnetic field to give a large increase in the viscosity. Such a significant increase in the viscosity is due to the fact that chain-like clusters are formed owing to magnetostatic interactions between particles in an applied magnetic field. The microstructure formation offers a large resistance to a flow field that gives rise to a significant increase of the apparent viscosity (2).

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Fibrin Formation in Shear Flow: A and B Peptide Release

10.1055/s-0039-1687329 ◽

1979 ◽

Author(s):

J.P. Sellers ◽

H.A. Puryear ◽

H.G. Clark

Keyword(s):

Shear Flow ◽

Flow Field ◽

Relative Rate ◽

Flow Fields ◽

Minimum Rate ◽

Fibrin Formation ◽

Peptide Release

Fibrinogen reacted with thrombin at pH 6.3 in shear flow fields varying from 0 to 150 sec-1 gives insoluble fibrin at differing ratio, with a minimum rate near 50 sec-1. The relative rate of release of A and B peptides is also altered by the shear flow field. The release or B peptide is faster in stagnant solutions than in the higher shear flow.

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The motion of a droplet subjected to linear shear flow including the presence of a plane wall

Journal of Fluid Mechanics ◽

10.1017/s0022112095004009 ◽

1995 ◽

Vol 302 ◽

pp. 45-63 ◽

Cited By ~ 33

Author(s):

W. S. J. Uijttewaal ◽

E. J. Nijhof

Keyword(s):

Shear Flow ◽

Flow Field ◽

Theoretical Models ◽

Boundary Integral ◽

Plane Wall ◽

Time Dependent ◽

Fluid Inertia ◽

Linear Shear ◽

Material Element ◽

Migration Velocities

A fluid droplet subjected to shear flow deforms and rotates in the flow. In the presence of a wall the droplet migrates with respect to a material element in the undisturbed flow field. Neglecting fluid inertia, the Stakes problem for the droplet is solved using a boundary integral technique. It is shown how the time-dependent deformation, orientation, circulation and droplet viscosity. The migration velocities are calculated in the directions parallel and perpendicular to the wall, and compared with theoretical models and expeeriments. The results reveal some of the shortcomings of existiong models although not all diserepancies between our calculations and known experiments could be clarified.

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Experimental Study on Numerical Controlled Electrochemical Turning

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.426-427.658 ◽

2010 ◽

Vol 426-427 ◽

pp. 658-663 ◽

Cited By ~ 3

Author(s):

Min Kang ◽

X.Q. Fu ◽

Yong Yang

Keyword(s):

Experimental Study ◽

Surface Roughness ◽

Flow Field ◽

Rotational Speed ◽

Cylindrical Surface ◽

Special Kind ◽

Machining Process ◽

Experimental Setup ◽

Electrolyte Flow ◽

Electrochemical Turning

In order to machine revolving workpieces which are made of difficult-to-cut materials or have low rigidity, the technology of Numerical Controlled Electrochemical Turning (NC-ECT) was put forward and the preliminary experimental study was presented in this paper. To carry out the study, an experimental setup was developed, and a new special kind of inner-spraying cathode with single linear edge was designed according to the process of machining cylindrical surface and the requirement of stable electrolyte flow field. First, the NC-ECT method was simply described. Then, considering the structure of the cathode and the machining process, the method for calculating the material removed depth per revolution in machining the cylindrical surface was given. Finally, the experiments of machining the cylindrical surface were carried out. Experiments showed: 1) The calculated material removed depth per revolution is well consistent with the actual value of the machining process, which decreases with the increase of the rotational speed of the workpiece and increases almost linearly with the increase of the working voltage; 2) The surface roughness decreases with the increase of the rotational speed of the workpiece and the working voltage; 3) The working current in the machining process trend to stable after several revolutions.

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Fibre Orientation Control Related to Papermaking

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2006-98408 ◽

2006 ◽

Author(s):

A. Carlsson ◽

F. Lundell ◽

L. D. So¨derberg

Keyword(s):

Shear Flow ◽

Flow Field ◽

Surface Structure ◽

Fibre Orientation ◽

Flow Direction ◽

Glass Plate ◽

Ccd Camera ◽

Plate Surface ◽

Steerable Filters ◽

Fibre Suspension

The wall effect on the orientation of fibres suspended in a shear flow has been studied experimentally. A fibre suspension, driven by gravity down an inclined glass plate, constitutes the shear flow field. A CCD-camera was mounted underneath the flow in order to visualize the flow. The orientation of fibres in the plane perpendicular to the plate was determined, by using the concept of steerable filters. In a region close to the smooth plate surface the fibres oriented themselves perpendicular to the flow direction. This did not occur when the surface structure was modified with ridges.

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