Paradoxical ratcheting in cornstarch

Troy Shinbrot; Matthew Rutala; Andrea Montessori; Pietro Prestininzi; Sauro Succi

doi:10.1063/1.4934709

Paradoxical ratcheting in cornstarch

Troy Shinbrot, Matthew Rutala, Andrea Montessori, Pietro Prestininzi, Sauro Succi

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

In this paper, we demonstrate that vertically vibrating a plate in a cornstarch suspension causes the suspension to vigorously ratchet up the plate.We show that this is a necessary consequence of the fact that cornstarch inwater is shear thickening: when the plate moves up it opposes gravity and so the fluid stiffens; when it moves down itworks with gravity and so the fluid flows. This produces asymmetric ratcheting that opposes gravity. We find several unusual states that result in this simple experimental system, and we reproduce the essential effect in two different numerical simulations.

Original language	English (US)
Article number	103101
Journal	Physics of Fluids
Volume	27
Issue number	10
DOIs	https://doi.org/10.1063/1.4934709
State	Published - Oct 1 2015

All Science Journal Classification (ASJC) codes

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1063/1.4934709

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title = "Paradoxical ratcheting in cornstarch",

abstract = "In this paper, we demonstrate that vertically vibrating a plate in a cornstarch suspension causes the suspension to vigorously ratchet up the plate.We show that this is a necessary consequence of the fact that cornstarch inwater is shear thickening: when the plate moves up it opposes gravity and so the fluid stiffens; when it moves down itworks with gravity and so the fluid flows. This produces asymmetric ratcheting that opposes gravity. We find several unusual states that result in this simple experimental system, and we reproduce the essential effect in two different numerical simulations.",

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AU - Rutala, Matthew

AU - Montessori, Andrea

AU - Prestininzi, Pietro

AU - Succi, Sauro

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Y1 - 2015/10/1

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AB - In this paper, we demonstrate that vertically vibrating a plate in a cornstarch suspension causes the suspension to vigorously ratchet up the plate.We show that this is a necessary consequence of the fact that cornstarch inwater is shear thickening: when the plate moves up it opposes gravity and so the fluid stiffens; when it moves down itworks with gravity and so the fluid flows. This produces asymmetric ratcheting that opposes gravity. We find several unusual states that result in this simple experimental system, and we reproduce the essential effect in two different numerical simulations.

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Paradoxical ratcheting in cornstarch

Abstract

All Science Journal Classification (ASJC) codes

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