The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform
R.m. Heethaar - One of the best experts on this subject based on the ideXlab platform.
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Lateral migration of blood cells and microspheres in two-dimensional Poiseuille fLow: A laser-Doppler study
Journal of biomechanics, 1994Co-Authors: Wim S. J. Uijttewaal, Evert-jan Nijhof, R.m. HeethaarAbstract:The inertia-induced lateral migration of rigid microspheres, platelets and erythrocytes is studied experimentally. The concentration and velocity profiles of the particles have been determined with a laser-Doppler anemometer designed for high resolution measurements. Data are compared with empirical and analytical models on inertia-induced lateral migration of rigid spheres. Experiments done in rectangular fLow channels of high aspect ratio reveal that at a sufficiently high particle Reynolds number, platelets exhibit tubular pinch effects comparable with those of rigid polystyrene microspheres. Erythrocytes also exhibit inertia-induced lateral migration at high particle Reynolds number and Low Medium Viscosity. At a higher Medium Viscosity, erythrocytes show deformation-induced lateral migration towards the center of the fLow channel.
Kyung Hyun Ahn - One of the best experts on this subject based on the ideXlab platform.
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An experimental study on the squeezing fLow of electrorheological suspensions
Journal of Rheology, 2000Co-Authors: Sang-hyon Chu, Seung Jong Lee, Kyung Hyun AhnAbstract:Electrorheological (ER) properties of ER suspensions composed of silica particles and silicone oil under the squeezing fLow have been investigated experimentally by changing experimental conditions such as applied electric field, volume concentration of silica particles, Medium Viscosity of silicone oil, and water content in silica. ER behavior in the squeeze fLow is unique in several ways compared to that in the shear fLow. Electric field and volume concentration increase as the squeezing proceeds, which increases the strength of chain structures formed between the electrodes. High yield stress and normal stress can be obtained in the case of high voltage, high volume fraction, Low Medium Viscosity, and high water content. As the squeezing proceeds, the normal stress increases, showing some fluctuation due to the deformation of chain structures in the suspension. The fluctuation observed in the stress grows so violent under a certain condition, which seems to be caused partly by macroscopic rearrangement...
Fengnian Shi - One of the best experts on this subject based on the ideXlab platform.
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Determination of ferrosilicon Medium rheology and stability
Minerals Engineering, 2016Co-Authors: Fengnian ShiAbstract:Abstract Ferrosilicon (FeSi) has a fast settling rate in dense suspension, attributed to its very high solids density, coarse particle size, more spherical particle shape and Low Medium Viscosity. The fast-settling nature in dense suspension is a challenge to acquire reliable rheological data. A testing rig was set up to maintain a constant Medium density during the rheology measurement by circulating the Medium to keep FeSi particles well suspended. A rotational rheometer with a modified concentric bob-cup measuring system was incorporated in the testing rig. Taylor number (Ta) was calculated and a threshold Ta = 41.3 was used to identify the onset of unstable laminar fLow owning to the Taylor vortices and turbulence formation in the measuring system. The data with Ta > 41.3 were excluded in the determination of rheological fLow curves. Evaluation of the modified measuring system with Newtonian silicone oils of known viscosities confirmed that the system can produce true fLow curves over the entire tested shear rate range for a stable laminar fLow (Ta
Wim S. J. Uijttewaal - One of the best experts on this subject based on the ideXlab platform.
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Lateral migration of blood cells and microspheres in two-dimensional Poiseuille fLow: A laser-Doppler study
Journal of biomechanics, 1994Co-Authors: Wim S. J. Uijttewaal, Evert-jan Nijhof, R.m. HeethaarAbstract:The inertia-induced lateral migration of rigid microspheres, platelets and erythrocytes is studied experimentally. The concentration and velocity profiles of the particles have been determined with a laser-Doppler anemometer designed for high resolution measurements. Data are compared with empirical and analytical models on inertia-induced lateral migration of rigid spheres. Experiments done in rectangular fLow channels of high aspect ratio reveal that at a sufficiently high particle Reynolds number, platelets exhibit tubular pinch effects comparable with those of rigid polystyrene microspheres. Erythrocytes also exhibit inertia-induced lateral migration at high particle Reynolds number and Low Medium Viscosity. At a higher Medium Viscosity, erythrocytes show deformation-induced lateral migration towards the center of the fLow channel.
Sang-hyon Chu - One of the best experts on this subject based on the ideXlab platform.
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An experimental study on the squeezing fLow of electrorheological suspensions
Journal of Rheology, 2000Co-Authors: Sang-hyon Chu, Seung Jong Lee, Kyung Hyun AhnAbstract:Electrorheological (ER) properties of ER suspensions composed of silica particles and silicone oil under the squeezing fLow have been investigated experimentally by changing experimental conditions such as applied electric field, volume concentration of silica particles, Medium Viscosity of silicone oil, and water content in silica. ER behavior in the squeeze fLow is unique in several ways compared to that in the shear fLow. Electric field and volume concentration increase as the squeezing proceeds, which increases the strength of chain structures formed between the electrodes. High yield stress and normal stress can be obtained in the case of high voltage, high volume fraction, Low Medium Viscosity, and high water content. As the squeezing proceeds, the normal stress increases, showing some fluctuation due to the deformation of chain structures in the suspension. The fluctuation observed in the stress grows so violent under a certain condition, which seems to be caused partly by macroscopic rearrangement...
