Weissenberg Effect as an End-point in Coagulation Studies

Janes, D E; Thomas, Hugh

doi:10.1038/216197a0

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Многие эффекты, наблюдавшиеся при применении дискретных и спирально-бороздчатых зондов, могут быть объяснены и симулированы с помощью известных подходов [68,69]. Кроме того, возможно влияние зондов сложных форм как миксеров исходного молочного сырья на его консистенцию и коагуляционные эффекты, изменяющие характер потоков в процессе перемешивания [70] (хотя из животноводческого сырья и продуктов не только молочные продукты способны демонстрировать эффект Вайсенберга [71]). При попытках интерпретации и моделирования эффектов, регистрируемых в подобных экспериментах, логично, опираясь на практику последних лет, отраженную в монографиях, использовать группы Ли [72], методы компьютерной жидкостной динамики (CFD) и соответствующие программные пакеты (Autodesk Simulation CFD и др.)…”

Section: Discussionunclassified

[Laser rheogoniometer for Weissenberg effect observation in condensed milk products as simple liquids with nonnewtonian viscosity]

Градов¹

2019

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This article describes the modern method of Weissenberg effect observation in condensed milk or whipped cream using a simplest laser-based optical setup. The DIY method to be described here involves minimal nomenclature of low-cost or second-hand devices and accessories. We now describe only a general technique for rheometric measurements with this setup, because any variation on the specified example can be provided by the basic principle of the setup construction. [Градов, О. В. Лазерный diy-реогониометр для наблюдения эффекта Вайсенберга в сгущенных молокопродуктах как неньютоновских жидкостях. Молочнохозяйственный вестник, 2(10) (2013), 36–56].

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Section: Discussionunclassified

[Laser rheogoniometer for Weissenberg effect observation in condensed milk products as simple liquids with nonnewtonian viscosity]

Градов¹

2019

Preprint

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“…Here we demonstrate that a collection of active shakers made of driven magnetic microrotors can self organize into large scale dynamic bands displaying a zig-zag shape. First, we experimentally determine the flow field around a microrotor which originates from a microscopic version of the Weissenberg effect [44][45][46], and is astonishingly similar to that of a shaker force dipole [47]. Finite element simulations confirm that the elastic stresses around the periodically rotating particles drive a net dipolar flow field.…”

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confidence: 91%

Large Scale Zigzag Pattern Emerging from Circulating Active Shakers

2023

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We report the emergence of large zig-zag bands in a population of reversibly actuated magnetic rotors that behave as active shakers, namely squirmers that shake the fluid around them without moving. The shakers collectively organize into dynamic structures displaying self-similar growth, and generate topological defects in form of cusps that connect vortices of rolling particles with alternating chirality. By combining experimental analysis with particle-based simulation, we show that the special flow field created by the shakers is the only ingredient needed to reproduce the observed spatiotemporal pattern. We unveil a self-organization scenario in a collection of driven particles in an elastic medium emerging from the reduced particle degrees of freedom, as here the frozen orientational motion of the shakers.

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