scholarly journals Shear Stress Measurements of Non-Spherical Particles in High Shear Rate Flows

2008 ◽  
Author(s):  
Erin Koos ◽  
Melany L. Hunt ◽  
Christopher E. Brennen ◽  
Albert Co ◽  
Gary L. Leal ◽  
...  
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
High Shear Rate ◽  
Spherical Particles ◽  
High Shear ◽  
Stress Measurements

Analysis of Thrombus Formation Process by Flow Induced High Shear Rate Using Optical Observation Method

2013 ◽  
Author(s):  
Masaaki Tamagawa
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Formation Process ◽  
Thrombus Formation ◽  
Laser Sheet ◽  
Formation Rate ◽  
High Shear Rate ◽  
Square Root ◽  
High Shear ◽  
Observation Method

This paper describes visualization of thrombus formation process on orifice flows by laser sheet beam and normal illumination. The aim is to investigate the effects of shear stress or shear rate on the thrombus formation or thrombus formation rate. It was found that the white thrombus formation rate is proportional to square root of shear rate, and the white thrombus is dominant when the shear rate is more than 450 (1/s).

Effects of High Shear Rate on Thrombus Formation Rate on Pipe Orifice Flows Using Laser Sheet Method and the Prediction of Thrombus Formation Rate by CFD

2012 ◽  
Author(s):  
Masaaki Tamagawa
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Plasma Flow ◽  
Formation Process ◽  
Thrombus Formation ◽  
Laser Sheet ◽  
Formation Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Rate Region

This paper describes visualization of thrombus formation process on orifice flows by laser sheet beam. The aim is to investigate the effects of shear stress or shear rate on the thrombus formation or thrombus formation rate. In this investigation, by visualization of the thrombus formation in blood plasma flow, it was found that the high shear rate region of the flow has large effects of the thrombus formation.

Morphology and rheology of PP/POE blends in high shear stress field

2017 ◽  
Vol 31 (9) ◽  
pp. 1263-1280 ◽  
Author(s):  
Jiru Ying ◽  
Xiaolin Xie ◽  
Shaoxian Peng ◽  
Huamin Zhou ◽  
Dequn Li
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Stress Field ◽  
Polymer Blends ◽  
Morphological Evolution ◽  
High Shear Rate ◽  
Dispersed Phase ◽  
High Shear ◽  
High Shear Stress ◽  
Shear Stress Field

Polypropylene (PP)/polyolefin elastomer (POE; ethylene–octene copolymer) blends with varying weight percentages of POE were prepared in a twin-screw extruder and molded through high shear rate injection-molding process. The morphologies and rheology of the PP/POE blends were systematically investigated based on rheological data and experimental analysis. The results indicate that the polymer blends of plastic and rubber in a high shear stress field result in a multilayered microstructure, which can be divided into skin, transitional, shear, and core layers according to the morphology of the dispersed phase. The morphology formation of the dispersed phase depends on the shear field and temperature field in the processing. Morphological evolution of the dispersed POE phases in PP matrix was described and quantified. A dragging ellipsoid model and capillary number were employed to describe the morphological evolution of the dispersed phase, and the morphological parameters were obtained. The results show that the dragging ellipsoid model is well suited to explain the morphological evolution of the dispersed phase in polymer blends molded under high shear rate.

Observation of Thrombus Formation Process by High Shear Rate on Various Flows and CFD Based Prediction Method for Thrombus Formation Rate

2014 ◽  
Author(s):  
Masaaki Tamagawa
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Quantitative Evaluation ◽  
Formation Process ◽  
Thrombus Formation ◽  
Formation Rate ◽  
Prediction Method ◽  
High Shear Rate ◽  
High Shear

This paper describes visualization of thrombus formation process on orifice flows and Couette flows by normal illumination. The aim is to investigate the effects of shear stress or shear rate on the thrombus formation or thrombus formation rate. It was found that (1) effect of flow types on the thrombus ratio was obtained and (2) quantitative evaluation of thrombus formation rate by our proposed CFD based prediction method was established for various flows.

scholarly journals Effect of solid paraffin's on crude oil rheology

2006 ◽  
Vol 60 (1-2) ◽  
pp. 10-14 ◽  
Author(s):  
Radmila Secerov-Sokolovic ◽  
Zoran Bjelovic ◽  
Srdjan Sokolovic
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Crude Oil ◽  
Constant Temperature ◽  
High Shear Rate ◽  
High Shear ◽  
Solid Paraffin ◽  
Kerosene Fraction

Effect of solid paraffin on crude oil rheology was investigated. The experiments were carried out on model-crude oil at constant temperature 30?C. Medical paraffin malting point of 61 ?C different concentration was dissolved in kerosene fraction. Concentration range of paraffin was from 1 to 32% weight. Shear stress strongly depends on paraffin's content only over high shear rate. Shear stress increases exponentially with increasing paraffin concentration for high shear rate. This dependence does not existed for real crude oil investigated in this paper.

Protein-based nanoparticles synthesized at a high shear rate and optimized for drug delivery applications

2021 ◽  
pp. 116133
Author(s):  
Saeideh Hassanzadeh ◽  
Ali Nematollahzadeh ◽  
Behruz Mirzayi ◽  
S. Fatemeh Kaboli
Keyword(s):  
Drug Delivery ◽  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Drug Delivery Applications

Analysis of Factors Determining Parison Properties in High Shear Rate Blow Molding

1975 ◽  
Vol 19 (3) ◽  
pp. 351-370 ◽  
Author(s):  
J. S. Schaul ◽  
M. J. Hannon ◽  
K. F. Wissbrun
Keyword(s):  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Blow Molding

Development and calibration of a high pressure high shear rate capillary rheometer

2017 ◽  
Vol 157 ◽  
pp. 581-587 ◽  
Author(s):  
Stefan Pollak ◽  
Sandra Hüttemann ◽  
Sergio E. Quiñones-Cisneros ◽  
Eckhard Weidner
Keyword(s):  
High Pressure ◽  
Shear Rate ◽  
High Shear Rate ◽  
High Shear ◽  
Capillary Rheometer

scholarly journals Electro-Rheological Properties of Liquid Crystal in High Shear Rate Region

2007 ◽  
Vol 35 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Takatsune Narumi ◽  
Hiroyoshi Maeda ◽  
Hiroyuki Yoshizawa ◽  
Tomiichi Hasegawa
Keyword(s):  
Liquid Crystal ◽  
Shear Rate ◽  
Rheological Properties ◽  
High Shear Rate ◽  
High Shear ◽  
Rate Region

Rheological behavior of SAN/PC blends under extremely high shear rate

1989 ◽  
Vol 37 (7) ◽  
pp. 1837-1853 ◽  
Author(s):  
Hideroh Takahashi ◽  
Takaaki Matsuoka ◽  
Takashi Ohta ◽  
Kenzo Fukumori ◽  
Toshio Kurauchi ◽  
...  
Keyword(s):  
Shear Rate ◽  
Rheological Behavior ◽  
High Shear Rate ◽  
High Shear
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