How to construct the perfect sandcastle

Autor: Peder Moller, Daniel Bonn, Maryam Pakpour, Mehdi Habibi

Publikováno v: Scientific Reports, 2:549. Nature Publishing Group
Scientific Reports
Scientific Reports 2 (2012)
Scientific Reports, 2

Just a bit of water enables one to turn a pile of dry sand into a spectacular sandcastle. Too much water however will destabilize the material, as is seen in landslides. Here we investigated the stability of wet sand columns to account for the maximu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a67ce25caf6e7b8af9df06355545255
https://doi.org/10.1038/srep00549

An attempt to categorize yield stress fluid behaviour

Autor: Vijayakumar Chikkadi, Peder Moller, Abdoulaye Fall, Daniel Bonn, Didi Derks

Publikováno v: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society, The, 2009, 367 (1909), pp.5139-5155
Philosophical Transactions of the Royal Society A-Mathematical, Physical and Engineering Sciences, 367(1909), 5139-5155. The Royal Society
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2009, 367 (1909), pp.5139-5155
HAL

We propose a new view on yield stress materials. Dense suspensions and many other materials have a yield stress—they flow only if a large enough shear stress is exerted on them. There has been an ongoing debate in the literature on whether true yie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dee972c3f8317505be467332efb4f7e1
https://pubmed.ncbi.nlm.nih.gov/19933132

Spontaneous generation of spiral waves by a hydrodynamic instability

Autor: Daniel Bonn, Neil M. Ribe, Mehdi Habibi, Peder Moller

Publikováno v: Europhysics Letters, 81(3). IOP Publishing Ltd.
EPL, 81(3)
EPL 81 (2008) 3

The coiling of a thin filament of viscous fluid falling onto a surface is a common and easily reproducible hydrodynamic instability. Here we report for the first time that this instability can generate regular spiral patterns, in which air bubbles ar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::157edd4ecbb33021669dbbcc52f8bbcf
https://dare.uva.nl/personal/pure/en/publications/spontaneous-generation-of-spiral-waves-by-a-hydrodynamic-instability(e127fbc1-2144-4cfa-b814-f299bf04d6f6).html

Breakup of Air Bubbles in Water: Memory and Breakdown of Cylindrical Symmetry

Autor: Sidney R. Nagel, Peder Moller, Nathan C. Keim, Wendy W. Zhang

Using high-speed video, we have studied air bubbles detaching from an underwater nozzle. As a bubble distorts, it forms a thin neck which develops a singular shape as it pinches off. As in other singularities, the minimum neck radius scales with the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02cf1d019eee3fc7b9a23646b4b7058b

Origin of apparent viscosity in yield stress fluids below yielding

Autor: Peder Moller, Abdoulaye Fall, Daniel Bonn

Publikováno v: HAL
EPL-Europhysics Letters
EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2009, 87 (3), pp.38004
Europhysics Letters, 87(3). IOP Publishing Ltd.

For more than 20 years it has been debated if yield stress fluids are solid below the yield stress or actually flow; whether true yield stress fluids exist or not. Advocates of the true yield stress picture have demonstrated that the effective viscos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::402b1d7cac049965e11781ece925392a
https://doi.org/10.1209/0295-5075/87/38004