Article
Materials Science, Multidisciplinary
Jiangzhou Mei, Gang Ma, Jiaying Liu, Francois Nicot, Wei Zhou
Summary: This paper investigates the transition between the solid and liquid phases of sheared granular materials from the perspective of the contact network. Persistent homology tools are used to quantify the dynamics of the contact network, and two important topological invariants, components and loops, are analyzed through numerical simulations. The study reveals the heterogeneous composition of the contact network and suggests a partition threshold for distinguishing strong and weak contact subnetworks. Mechanical precursors of the solid-liquid transition are identified during the shearing process. The study demonstrates the capability of the persistent homology method in bridging microscopic dynamics with macroscopic responses through the contact network.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Computer Science, Interdisciplinary Applications
Wei-Bin Chen, Wan-Huan Zhou, Lukasz Sadowski, Zhen-Yu Yin
Summary: The study quantified a series of random profiles using morphological parameters according to ISO 4287 standard, and developed an optimal metaheuristic model through the selection of relevant morphological parameters. The parameter Pdq was found to be more efficient and accurate in quantifying surface morphology or estimating interface shear strength compared to relative roughness in most geotechnical engineering applications.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
C. di Prisco, I. Redaelli, M. Zerbi
Summary: Rockfall, a common natural hazard in mountain regions, is difficult to simulate numerically due to the complex interaction between rock blocks and soil strata. In this study, a dynamic upscaled visco-plastic rheological model (BIMPAM) was validated using numerical analyses based on experimental data. The results highlighted the importance of impacting velocity inclination on the dynamic interaction and provided a detailed micromechanical description.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Chemical
Yankang Deng, Miaomiao Zhu, Tao Lu, Qingwei Fan, Wenjing Ma, Xiaoli Zhang, Long Chen, Huihua Min, Ranhua Xiong, Chaobo Huang
Summary: This study developed a unique granular-convex structure on the surface of fibers through green preparation, providing efficient physical interception and adsorption capabilities for excellent removal of air pollutants with low air resistance. The fiber membrane also exhibited water resistance and mechanical properties, offering a positive strategy for high-performance air filtration.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Geological
Irene Redaelli, Claudio di Prisco, Francesco Calvetti
Summary: The study emphasizes the importance of assessing the time evolution of impact force exerted by dry flowing masses on rigid obstacles for dynamic design of sheltering structures and vulnerability evaluation of existing structures. A physically based force-time function is proposed to correlate local information with macroscopic response, providing insight into the impact process and factors influencing impact force-time evolution.
Article
Computer Science, Software Engineering
Yang Gao, Shuai Li, Aimin Hao, Hong Qin
Summary: This article proposes the use of a hybrid Euler-Lagrange solver to faithfully handle the behaviors of multi-scale granular materials and their phase transitions. By combining the affine particle-in-cell solver with density field in a unified framework, the transformation among granular particles, dust cloud, powders, and their mixtures can be achieved. Additionally, the introduction of a moisture property for granular particles and a surface-tracking procedure for simulating viscous liquid phase enhance the modeling and simulation capabilities of the particle-grid hybrid materials in graphics.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2021)
Article
Engineering, Multidisciplinary
Karola Dierichs, Achim Menges
Summary: Designed granular materials are a novel class of architectural material system where material form and function are closely related. A parametric particle design model can calibrate the function of granular materials. Further research directions focus on integrating the parametric particle design model into 'inverse' design methods.
BIOINSPIRATION & BIOMIMETICS
(2021)
Article
Engineering, Mechanical
Yibo Zhang, Wei Zhou, Gang Ma, Ruilin Cheng, Xiaolin Chang
Summary: This study simulates triaxial tests of granular materials using discrete element method and develops a machine learning model to predict the plastic deformation of particles based on their local structural information. The study also explores the impact of structural indicators on the physical and mechanical properties of granular materials and explains the variation in machine learning predictive power with different friction coefficients.
EXTREME MECHANICS LETTERS
(2022)
Article
Crystallography
Olga Miryuk, Roman Fediuk, Mugahed Amran
Summary: The research focuses on developing resource-saving technology for porous lightweight concrete aggregates by studying the thermal foaming process of glass crystalline granules. By utilizing waste materials and mineral fillers, the study successfully established regularities for improving foaming efficiency and pore structure. The resulting foam glass crystalline granules exhibit polymodal porosity with high potential for use in structural and heat-insulating concretes.
Article
Engineering, Chemical
O. J. Kramer, C. van Schaik, P. D. R. Dacomba-Torres, P. J. de Moel, E. S. Boek, E. T. Baars, J. T. Padding, J. P. van der Hoek
Summary: Granular activated carbon (GAC) filtration is crucial in drinking water treatment for filtering and adsorbing organic pollutants. The backwash procedure of GAC beds is equally important in preventing particle accumulation and reducing operation costs. Developing prediction models for backwashing is essential for optimizing performance and sustainability in water treatment.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Vladimir D. Manyilov, Nikolay S. Ilyinsky, Semen V. Nesterov, Baraa M. G. A. Saqr, Guy W. Dayhoff, Egor V. Zinovev, Simon S. Matrenok, Alexander V. Fonin, Irina M. Kuznetsova, Konstantin K. Turoverov, Valentin Ivanovich, Vladimir N. Uversky
Summary: This article examines the impact of intrinsically disordered proteins and regions on aging-related processes. The findings indicate that these disordered components play significant roles in aging, particularly in genome regulation.
CELLULAR AND MOLECULAR LIFE SCIENCES
(2023)
Article
Engineering, Chemical
Denis Bemer
Summary: The study aimed to establish the filtration performance of a fixed granular bed during filtration and its clogging by a liquid aerosol. Results showed that the filtration performance of granular beds during clogging was similar to fibrous media, with liquid occupying 28-33% of the pore volume and pressure drop being accurately predicted by a model.
Article
Mechanics
T. Barker, M. Rauter, E. S. F. Maguire, C. G. Johnson, J. M. N. T. Gray
Summary: In the last fifteen years, there has been a paradigm shift in the continuum modelling of granular materials, with the development of rheological models and theories for particle segregation. This paper presents a unified framework based on the partially regularized incompressible -rheology and gravity-driven segregation theory, which couples segregation with flow for handling evolving free surfaces. The numerical method is extensively tested and compared with discrete element method simulations, showing promising results in capturing complex segregation patterns.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Geological
Bei Zhang, Yu Huang
Summary: The design of baffles is influenced by particle size distribution and Froude characteristics, as shown in discrete-element method simulations. Baffle deceleration and granular flow run-up are affected by factors like particle size and Froude characteristics, with bidisperse granular flow having a more complex interaction with the baffles.
Article
Physics, Fluids & Plasmas
V Ralaiarisoa, P. Dupont, A. Ould El Moctar, F. Naaim-Bouvet, L. Oger, A. Valance
Summary: In this study, the impact process of a particle onto a cohesive granular packing was numerically investigated, and the production of ejected particles (splash process) was analyzed. The results showed that the splash process is modified when the cohesion number exceeds a critical value, and it is triggered above a threshold impact Froude number.
Article
Materials Science, Multidisciplinary
Julian O. Freeman, Sean Peterson, Cong Cao, Yujie Wang, Scott V. Franklin, Eric R. Weeks
Article
Materials Science, Biomaterials
Yow-Ren Chang, Eric R. Weeks, Daniel Barton, Jure Dobnikar, William Ducker
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2019)
Article
Nanoscience & Nanotechnology
Liqun Ning, Riya Mehta, Cong Cao, Andrea Theus, Martin Tomov, Ning Zhu, Eric R. Weeks, Holly Bauser-Heaton, Vahid Serpooshan
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Cordell J. Donofrio, Eric R. Weeks
Summary: The study in this paper investigates propensity in colloidal glass formers by simulating potential measurement issues, finding that a polydisperse sample is suitable for propensity measurements if reconstruction errors are avoided.
EUROPEAN PHYSICAL JOURNAL E
(2021)
Article
Chemistry, Multidisciplinary
Yixiao Dong, J. Dale Combs, Cong Cao, Eric R. Weeks, Alisina Bazrafshan, S. K. Aysha Rashid, Khalid Salaita
Summary: The research team developed a DNA hydrogel system with a significant decrease in modulus upon heating, allowing for the control of magnetic nanoparticles to generate structural color through photopatterning and magnetic field application, achieving spatially controlled photonic crystal coloration. This on-demand assembly technology may lead to the development of new smart materials with potential applications.
Article
Instruments & Instrumentation
Julio Gabriel de Falco Manuel, Antonio Jose Faria Bombard, Eric R. Weeks
Summary: Magnetorheological fluids (MRFs) are smart materials with great versatility in mechanical and mechatronic systems. This study analyzed the influence of particle size distribution on the maximum packing fraction, on-state yield stress, and off-state viscosity of concentrated MRF through experiments and simulations.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Physics, Fluids & Plasmas
Yonglun Jiang, Eric R. Weeks, Nicholas P. Bailey
Summary: We studied shear deformation of binary Lennard-Jones glasses to investigate the invariance of the transient part of the stress strain curves along an isomorph. Various methods for generating isomorphs were tested, but none provided sufficiently precise results for the large density changes in our study. Instead, isomorphic state points were chosen by requiring the steady-state flow stress to be invariant. We found that the peak stress on the stress strain curve decreases with increasing density, and this is attributed to varying tendency to form shear bands.
Article
Chemistry, Physical
Yuxuan Cheng, John D. Treado, Benjamin F. Lonial, Piotr Habdas, Eric R. Weeks, Mark D. Shattuck, Corey S. O'Hern
Summary: This study computationally investigates the factors influencing hopper flows of deformable particles and finds that the exponent beta varies with the ratio of viscous drag to kinetic friction coefficient.
Article
Physics, Fluids & Plasmas
Xia Hong, Kenneth W. Desmond, Dandan Chen, Eric R. Weeks
Summary: In this study, the flow behavior of a quasi-two-dimensional emulsion through a constricting hopper shape was experimentally and computationally investigated. The results showed that continuous droplet flow occurred at high flow rates, while droplet clogging and intermittent avalanches occurred at low flow rates. The transition between these behaviors was found to be influenced by the mean strain rate. Computational studies further revealed that the interplay between the flow rate and compliance of the system controlled the presence or absence of the avalanches.
Article
Physics, Fluids & Plasmas
Ran Tao, Madelyn Wilson, Eric R. Weeks
Summary: This study investigates the outflow of soft particles through quasi-two-dimensional hoppers using experiments and simulations. Results indicate that reducing gravitational force or using stiffer particles can lead to easier clogging. The average number of particles in a clogging arch depends on the ratio between hopper exit width and mean particle diameter.
Article
Physics, Fluids & Plasmas
A. Escobar, F. Donado, R. E. Moctezuma, Eric R. Weeks
Summary: In a quasi-two-dimensional system of magnetic spherical particles on a shallow concave dish under a temporally oscillating magnetic field, the energy losses from collisions and friction with the dish surface are compensated by continuous energy input from the magnetic field. Particle motions resemble that of atoms and molecules in glass or crystal-forming fluid, experiencing an additional force towards the center of the dish due to its curvature. Decreasing the magnetic field leads to decreased effective temperature and slower particle motion, eventually resulting in crystallization and the growth of a hexagonal lattice structure. The study supports nonclassical theories of crystal formation, where initially a dense amorphous aggregate of particles forms and rearranges internally to form the crystalline nucleus before growing into a crystal following classical theory.
Article
Chemistry, Physical
Cong Cao, Jianshan Liao, Victor Breedveld, Eric R. Weeks
Summary: The study found that emulsions with different droplet sizes exhibit different solid transitions in rheology, with small droplets showing both glass and jamming transitions, large droplets only showing jamming transition, and bidisperse samples exhibiting similar behavior to small droplets with two transitions observed. The rheological data are well-fit by the Herschel-Bulkley model and the three component model, but the raw data does not collapse onto a master curve, indicating that liquid-solid transitions in dispersions are not universal but depend on particle size.
Article
Chemistry, Physical
Jean-Christophe Ono-Dit-Biot, Pierre Soulard, Solomon Barkley, Eric R. Weeks, Thomas Salez, Elie Raphael, Kari Dalnoki-Veress
Summary: This study investigates the elastic and yielding properties of defect-free mono-crystals made of highly monodisperse droplets. The crystals undergo successive row-reduction transitions as they are compressed, eventually fracturing in a catastrophic event. The elastic properties are captured by a simple analytical model of capillary springs, while the yielding properties are described by a minimal bond breaking model.
Article
Physics, Fluids & Plasmas
Eric R. Weeks, Keely Criddle
Editorial Material
Physics, Fluids & Plasmas
C. Tapia-Ignacio, R. E. Moctezuma, F. Donado, Eric R. Weeks
