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Transient dynamics of concentrated p...

Han, Endao.

Transient dynamics of concentrated particulate suspensions under shear

Record Type:	Electronic resources : Monograph/item
Title/Author:	Transient dynamics of concentrated particulate suspensions under shearby Endao Han.
Author:	Han, Endao.
Published:	Cham :Springer International Publishing :2020.
Description:	xvi, 96 p. :ill., digital ;24 cm.
Contained By:	Springer eBooks
Subject:	Suspensions (Chemistry)
Online resource:	https://doi.org/10.1007/978-3-030-38348-0
ISBN:	9783030383480$q(electronic bk.)

Transient dynamics of concentrated particulate suspensions under shear
Han, Endao.

Transient dynamics of concentrated particulate suspensions under shear[electronic resource] /by Endao Han. - Cham :Springer International Publishing :2020. - xvi, 96 p. :ill., digital ;24 cm. - Springer theses,2190-5053. - Springer theses..

Chapter1. Introduction -- Chapter2. Ultrasound techniques for studying suspensions -- Chapter3. Investigating impact-activated fronts with ultrasound -- Chapter4. Modeling shear fronts in one dimension -- Chapter5. Rheology in the shear jamming regime -- Chapter6. Conclusions and outlook.

This thesis demonstrates the first use of high-speed ultrasound imaging to non-invasively probe how the interior of a dense suspension responds to impact. Suspensions of small solid particles in a simple liquid can generate a rich set of dynamic phenomena that are of fundamental scientific interest because they do not conform to the typical behavior expected of either solids or liquids. Most remarkable is the highly counter-intuitive ability of concentrated suspensions to strongly thicken and even solidify when sheared or impacted. The understanding of the mechanism driving this solidification is, however, still limited, especially for the important transient stage while the response develops as a function of time. In this thesis, high-speed ultrasound imaging is introduced to track, for the first time, the transition from the flowing to the solidified state and directly observe the shock-like shear fronts that accompany this transition. A model is developed that agrees quantitatively with the experimental measurements. The combination of imaging techniques, experimental design, and modeling in this thesis represents a major breakthrough for the understanding of the dynamic response of dense suspensions, with important implications for a wide range of applications ranging from the handling of slurries to additive manufacturing.

ISBN: 9783030383480$q(electronic bk.)

Standard No.: 10.1007/978-3-030-38348-0doiSubjects--Topical Terms:

484468
Suspensions (Chemistry)

LC Class. No.: QD549 / .H364 2020

Dewey Class. No.: 541.345

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520 $a This thesis demonstrates the first use of high-speed ultrasound imaging to non-invasively probe how the interior of a dense suspension responds to impact. Suspensions of small solid particles in a simple liquid can generate a rich set of dynamic phenomena that are of fundamental scientific interest because they do not conform to the typical behavior expected of either solids or liquids. Most remarkable is the highly counter-intuitive ability of concentrated suspensions to strongly thicken and even solidify when sheared or impacted. The understanding of the mechanism driving this solidification is, however, still limited, especially for the important transient stage while the response develops as a function of time. In this thesis, high-speed ultrasound imaging is introduced to track, for the first time, the transition from the flowing to the solidified state and directly observe the shock-like shear fronts that accompany this transition. A model is developed that agrees quantitatively with the experimental measurements. The combination of imaging techniques, experimental design, and modeling in this thesis represents a major breakthrough for the understanding of the dynamic response of dense suspensions, with important implications for a wide range of applications ranging from the handling of slurries to additive manufacturing.
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