Article
Mechanics
Vicente Garzo
Summary: Understanding the transport of particles in a carrier fluid is a challenging task. The proposed two-fluid model by Chassagne et al. takes into account interparticle friction and the saltation regime, providing a better understanding of the macroscopic properties of granular flows. The model agrees with simulations and experimental results, demonstrating its reliability.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Geological
Ke Shi, Fan Zhu, Jidong Zhao
Summary: This study uses a multiscale computational approach to simulate the shearing behavior of crushable granular sand at critical state and analyzes its characteristics. The results show that the critical state has unique features for crushable granular sand, including critical state stress ratio, void ratio, breakage index, and shape descriptors.
Article
Physics, Multidisciplinary
R. Caitano, B. Guerrero, R. E. R. Gonzalez, I Zuriguel, A. Garcimartin
Summary: The study confirms the transition from clogged to unclogged state in vibrating granular media, characterizing it based on outlet size and vibration intensity. The study proposes a new control parameter for the system and observes a critical value for a continuous transition to an unclogged state, which varies with the outlet size. A phase diagram in the S-D plane shows clogging as a concave surface.
PHYSICAL REVIEW LETTERS
(2021)
Article
Engineering, Chemical
Wangxin Yu, Xiaoliang Wang, Qingquan Liu, Xuedong Chen, Huaning Wang
Summary: This study investigates the dynamic interaction between fast granular flow and an existing deposit using the Savage-Hutter model. Three distinct flow patterns are identified, and a new normal shock relationship for granular flow is proposed.
Article
Thermodynamics
Reza Azadi, David S. Nobes
Summary: This study investigates the local dynamics of liquid film and corner flows in a flowing square channel, revealing rapid velocity changes in film and corner flows adjacent to the minimum film area. The film flow exhibits significant pressure drops as it passes through the minimum film area, while the corner flow does not demonstrate any rapid pressure fluctuations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Multidisciplinary
Kasra Farain, Daniel Bonn
Summary: The question of when dense granular materials start to flow under stress has not been resolved. A simple equation based on frictional aging of the granular packing is developed and tested, resulting in a nonmonotonic stress-strain relation independent of shear rate. This relation helps understand the quasistatic deformations and solid-to-liquid transition of aging granular media. It also explains the flow history dependence of mechanical properties and sensitivity to initial preparation of granular media.
PHYSICAL REVIEW LETTERS
(2023)
Article
Construction & Building Technology
Wei Wang, Feng Jin, Bohao Wang, Gang Wang, Duruo Huang, Chunyang Cui
Summary: The deposition morphology of cement grout in granular materials is studied, and it is found that the morphology varies with the yield stress of the grout.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Chuanhao Zhu, Xudong Zhang, Renyuan Xu, Yuyue Zhong, Silu Li, Jinyuan Li, Chenggang Huang, Wenhao Wu, Mingming Zhai, Seitkali Nurzikhan, Andreas Blennow, Dongwei Guo
Summary: Bivariate flow cytometry sorting using FSC and SSC is a novel technique for separating starch granules. The size, composition, and structure of starch granules impact the FC-dependent distribution patterns. Specifically, granule size is correlated with both FSC and SSC-dependent distribution patterns.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Astronomy & Astrophysics
Peter M. Miklavcic, Paul Sanchez, Esteban Wright, Alice C. Quillen, Hesam Askari
Summary: Oblique, low-velocity impacts onto non-terrestrial terrain are common in space exploration missions. The study conducted two-dimensional discrete simulations to model such impacts and recreate the three classes of impact behavior previously observed from experiments. The calculations of Von Mises strain distributions revealed the shifting of grains relative to the overall system, providing insights into the 'skin zone' concept.
Article
Mathematics, Applied
Christelle Lusso, Francois Bouchut, Alexandre Ern, Anne Mangeney
Summary: This study provides an analytical description of the dynamics of the static/flowing interface in thin dry granular flows, simplifying the asymptotic model derived from a thin-layer approximation by decoupling the space coordinates and introducing a time- and Z-dependent source term. The crucial advantage of this simplified model is its ability to provide explicit solutions in the inviscid case, showcasing rich behavior for different shapes of the source term.
ESAIM-MATHEMATICAL MODELLING AND NUMERICAL ANALYSIS-MODELISATION MATHEMATIQUE ET ANALYSE NUMERIQUE
(2021)
Article
Computer Science, Artificial Intelligence
Shreetam Behera, Debi Prosad Dogra, Malay Kumar Bandyopadhyay, Partha Pratim Roy
Summary: This paper proposes an algorithm to describe the movement of groups in crowded scenarios by analyzing videos. The force model and computer vision techniques are used to segment flows more accurately. Experimental results show that the proposed system achieves a 10% improvement in segmentation accuracy and NMI compared to existing algorithms.
PATTERN RECOGNITION
(2021)
Article
Engineering, Chemical
Quan Chen, R. Li, W. Z. Xiu, V Zivkovic, H. Yang
Summary: The experimental results show that the dynamics of the granular system in a narrowing silo during discharge is stable. Ordered particle movements may occur near the outlet. The correlation between the granular temperature distribution and the velocity vector field is opposite in different directions.
Article
Environmental Sciences
Sk Zeeshan Ali, Subhasish Dey
Summary: The study demonstrates that the switching of sand patterns from meso-scale to large-scale is driven by the complex feedback between grain transport and topographic perturbations under turbulent shear flow conditions. The switching mainly depends on the magnitudes of the Rouse number and the grain size to undisturbed flow depth ratio.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2021)
Article
Mechanics
Giorgos Kanellopoulos, Dimitrios Razis, Ko van der Weele
Summary: This paper theoretically describes the appearance and characteristics of granular roll waves in chute flow, as well as the maximal size these waves can attain for a given influx of material. The paper finds that the size of the roll waves is constrained by a homoclinic loop in phase space, and larger amplitude roll waves can be generated by increasing the Froude number.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Chemistry, Physical
Wu Yujing, Zhou Hongxiu, Zhang Ao, Zhao Leqing
Summary: The research shows that flowing electrode direct methanol fuel cell (FEDMFC) effectively reduces methanol crossover rate while maintaining high power densities. Increasing flow rate can decrease crossover rate but will affect efficiency and stability, with optimal flow rate controlled at 1-3 sccm.
JOURNAL OF POWER SOURCES
(2022)
Article
Geography, Physical
Dieter Issler, James T. Jenkins, Jim N. McElwaine
JOURNAL OF GLACIOLOGY
(2018)
Article
Multidisciplinary Sciences
L. E. Mc Keown, M. C. Bourke, J. N. McElwaine
SCIENTIFIC REPORTS
(2017)
Article
Geochemistry & Geophysics
Charles K. C. Lieou, Eric G. Daub, Robert A. Guyer, Robert E. Ecke, Chris Marone, Paul A. Johnson
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2017)
Article
Materials Science, Multidisciplinary
N. J. Balmforth, J. N. McElwaine
Article
Astronomy & Astrophysics
Veronica J. Bray, Corwin Atwood-Stone, Catherine D. Neish, Natalia A. Artemieva, Alfred S. McEwen, Jim N. McElwaine
Article
Materials Science, Multidisciplinary
N. J. Balmforth, J. N. McElwaine
Article
Geosciences, Multidisciplinary
A. Kohler, J. N. McElwaine, B. Sovilla
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2018)
Article
Geosciences, Multidisciplinary
B. Sovilla, J. N. McElwaine, A. Kohler
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2018)
Article
Geochemistry & Geophysics
T. de Haas, B. W. McArdell, S. J. Conway, J. N. McElwaine, M. G. Kleinhans, F. Salese, P. M. Grindrod
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2019)
Article
Mechanics
Xuan Zhang, Robert E. Ecke, Olga Shishkina
Summary: In rapidly rotating turbulent Rayleigh-Benard convection with a small Prandtl number fluid in slender cylindrical containers, a boundary zonal flow (BZF) is found to develop near the sidewall, carrying a disproportionate amount of heat transport for Pr < 1 but decreasing abruptly for larger Pr. The BZF is robust and appears in containers of different aspect ratios and over a broad range of Pr and Ra values.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Multidisciplinary Sciences
Lauren Mc Keown, J. N. McElwaine, M. C. Bourke, M. E. Sylvest, M. R. Patel
Summary: The seasonal sublimation of CO2 ice deposits on Mars leads to the redistribution of granular material on the surface, resulting in unique araneiform terrain features. Laboratory experiments demonstrate that CO2 sublimation can efficiently transport sediment, contributing to the formation of araneiform patterns.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Fluids & Plasmas
Craig D. McConnochie, Claudia Cenedese, Jim N. McElwaine
Summary: Experimental results show that entrainment of ambient fluid into the flow system increases when the plume buoyancy flux is in the opposite direction to the particle buoyancy flux, while the addition of particles has no effect when the directions are the same. The entrainment rate linearly increases with the ratio of particle buoyancy flux to fluid buoyancy flux, independent of particle size.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Physics, Fluids & Plasmas
Robert E. Ecke, Xuan Zhang, Olga Shishkina
Summary: Using direct numerical simulations, this study investigates rotating Rayleigh-Benard convection and connects linear wall-mode states with the boundary zonal flow in the geostrophic regime. The data from various sources are quantitatively collapsed, providing insights into the heat transport contributions of the wall modes and boundary zonal flow.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Geosciences, Multidisciplinary
Alexander M. Taylor-Noonan, Elisabeth T. Bowman, Brian W. McArdell, Roland Kaitna, Jim N. McElwaine, W. Andy Take
Summary: The presence of a pore fluid significantly increases the mobility of granular flows. Wet granular flows show flow dilation and strong variation in velocity profile, resulting in higher mobility compared to dry flows. Experimental results also reveal the influence of source volume on flow behavior.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2022)
Article
Geography, Physical
Anselm Kohler, Jan-Thomas Fischer, Riccardo Scandroglio, Mathias Bavay, Jim McElwaine, Betty Sovilla