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        <title>Frontiers in Soft Matter | Granular Matter section | New and Recent Articles</title>
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        <description>RSS Feed for Granular Matter section in the Frontiers in Soft Matter journal | New and Recent Articles</description>
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        <pubDate>2026-05-14T11:23:51.300+00:00</pubDate>
        <ttl>60</ttl>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frsfm.2024.1399370</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frsfm.2024.1399370</link>
        <title><![CDATA[Editorial: Editors’ showcase 2023: granular matter]]></title>
        <pubdate>2024-04-03T00:00:00Z</pubdate>
        <category>Editorial</category>
        <author>Lou Kondic</author>
        <description></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frsfm.2023.1326756</guid>
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        <title><![CDATA[Protocol-dependent frictional granular jamming simulations: cyclical, compression, and expansion]]></title>
        <pubdate>2024-01-29T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>A. P. Santos</author><author>Ishan Srivastava</author><author>Leonardo E. Silbert</author><author>Jeremy B. Lechman</author><author>Gary S. Grest</author>
        <description><![CDATA[Granular matter takes many paths to pack in natural and industrial processes. The path influences the packing microstructure, particularly for frictional grains. We perform discrete element modeling simulations of different paths to construct packings of frictional spheres. Specifically, we explore four stress-controlled protocols implementing packing expansions and compressions in various combinations thereof. We characterize the eventual packed states through their dependence of the packing fraction and coordination number on packing pressure, identifying non-monotonicities with pressure that correlate with the fraction of frictional contacts. These stress-controlled, bulk-like particle simulations access very low-pressure packings, namely, the marginally stable limit, and demonstrate the strong protocol dependence of frictional granular matter.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frsfm.2024.1340744</guid>
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        <title><![CDATA[Flow rate in 2D silo discharge of binary granular mixtures: the role of ordering in monosized systems]]></title>
        <pubdate>2024-01-12T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>C. Manuel Carlevaro</author><author>Ryan Kozlowski</author><author>Luis A. Pugnaloni</author>
        <description><![CDATA[A long-standing debate regarding the dynamics of silo discharge revolves around the use of mono-dispersed circular or spherical grains in simplified two-dimensional models. It is well-known that granular systems composed of particles of the same size can generate crystal or quasi-crystal domains with specific structural and dynamic behaviors. Can this ordering affect the flow rate to an extent that monosized systems cannot be good models for realistic materials? In this work, we present simulations of the discharge of two-dimensional silos filled with binary mixtures of circular grains that conserve the same mean particle size. We address the question of how ordering affects the mass flow rate, in particular considering the limit of mono-sized systems. We find that the typical hexagonal order observed does not affect the flow rate significantly. However, the flow rate does exhibit a weak, nonmonotonic dependence on packing bidispersity that correlates with changes in the outpouring speed of grains in the vicinity of the orifice.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frsfm.2023.1302367</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frsfm.2023.1302367</link>
        <title><![CDATA[Connecting micro- and macroscopic variables in the design of a granular stirrer using simulations]]></title>
        <pubdate>2023-11-27T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Roberto Arévalo</author>
        <description><![CDATA[Predicting the mixing or segregation of granular of dense materials is difficult due to their athermal nature and lack of general theories. The goal of this research is to improve the design (diameter of the cylinder) and operation (rotational frequency of the screw conveyor) of the stirrer to attain good mixing. We characterize the mixing by some macroscopic measures and relate its behavior with the design parameters. Afterward, we compute some microscopic measurements that characterize the movement of the spheres and relate them with the operating conditions. The quality of mixing is found to depend on the rotation frequency of the screw conveyor and the gap between the latter and the enclosing cylinder. Besides, some relationships between micro- and macroscopic measures are drawn. This approach can provide guidance on the design or operation of devices to handle granular media when their microscopic behavior is previously known.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frsfm.2023.1143958</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frsfm.2023.1143958</link>
        <title><![CDATA[Trapping virus-loaded aerosols using granular material composed of protein nanofibrils and iron oxyhydroxides nanoparticles]]></title>
        <pubdate>2023-02-20T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Antonius Armanious</author><author>Heyun Wang</author><author>Peter A. Alpert</author><author>Chiara Medaglia</author><author>Mohammad Peydayesh</author><author>Arnaud Charles-Antoine Zwygart</author><author>Christian Gübeli</author><author>Stephan Handschin</author><author>Sreenath Bolisetty</author><author>Markus Ammann</author><author>Caroline Tapparel</author><author>Francesco Stellacci</author><author>Raffaele Mezzenga</author>
        <description><![CDATA[The ongoing COVID-19 pandemic has revealed that developing effective therapeutics against viruses might be outpaced by emerging variants, waning immunity, vaccine skepticism/hesitancy, lack of resources, and the time needed to develop virus-specific therapeutics, emphasizing the importance of non-pharmaceutical interventions as the first line of defense against virus outbreaks and pandemics. However, fighting the spread of airborne viruses has proven extremely challenging, much more if this needs to be achieved on a global scale and in an environmentally-friendly manner. Here, we introduce an aerosol filter media made of granular material based on whey protein nanofibrils and iron oxyhydroxides nanoparticles. The material is environmentally-friendly, biodegradable, and composed mainly of a dairy industry byproduct. It features filtration efficiencies between 95.91% and 99.99% for both enveloped and non-enveloped viruses, including SARS-CoV-2, the influenza A virus strain H1N1, enterovirus 71, bacteriophage Φ6, and bacteriophage MS2. While the filtration efficiencies were relatively high, they came at the cost of high pressure drop (≈0.03 bar). We believe that the methods and results presented here will contribute to advancing our understanding of granular-based aerosol filters, hopefully helping the design of highly-efficient granular media with low-pressure drops.]]></description>
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