The fragmentation-induced fluidisation of pyroclastic density currents [PDF]
Nature Communications, 2023 Pyroclastic density currents (PDCs) are the most lethal volcanic process on Earth. Forecasting their inundation area is essential to mitigate their risk, but existing models are limited by our poor understanding of their dynamics.
Eric C. P. Breard +5 more
doaj +2 more sources
Methodology for hydraulic characterisation of the sand filter backwashing processes used in micro irrigation [PDF]
MethodsX, 2020 The correct operation of the backwashing process in sand filters used in micro irrigation determines directly the effectiveness of the subsequent filtration processes, and consequently the micro irrigation systems maintenance. As backwashing involves the
Fábio Ponciano de Deus +4 more
doaj +2 more sources
Microrollers flow uphill as granular media [PDF]
Nature Communications, 2023 Pour sand into a container and only the grains near the top surface move. The collective motion associated with the translational and rotational energy of the grains in a thin flowing layer is quickly dissipated as friction through multibody interactions.
Samuel R. Wilson-Whitford +4 more
doaj +2 more sources
Thixo-viscoelastoplastic rheological characterisation of human mucus using a multimode BMP constitutive equation approach [PDF]
Scientific ReportsIn this work, the most recent Bautista-Manero-Puig (BMP) constitutive model-variant, i.e., the BMP+ $$\_\tau _p$$ rheological equation-of-state, is used as a theoretical approach to describe the thixo-viscoelastoplastic characteristics of human mucus ...
Michelle Figueroa-Landeta +4 more
doaj +2 more sources
Comparison of continuum models using the kinetic theory of granular flow with discrete particle models and experiments: extent of particle mixing induced by bubbles [PDF]
, 2003 The bubble formation and extent of particle mixing induced by a single bubble injected in a mono-disperse uidised bed at incipient \ud uidisation conditions has been studied with a Two-Fluid continuum Model (TFM) using the Kinetic Theory of Granular Flow
Bokkers, G.A. +2 more
core +23 more sources
Separations, 2023 This work is part of a research project aimed at studying potential sorbents for CO2 capture. The main parameters characterising the adsorption process of zeolite 13X were derived with the aim of overcoming the limits of experimental analysis and thus ...
Alessio Caravella +5 more
doaj +1 more source
Fluidisation of iron-based oxygen carrier for chemical looping combustion [PDF]
E3S Web of Conferences, 2019 The study focuses on the fluidisation of an iron-based material for chemical looping combustion. The Fe/FexOy system can act as an oxygen carrier. This material can be used to transfer the oxygen in the chemical looping combustion ensuring easy CO2 ...
Berkowicz Gabriela, Miłkoś Magdalena
doaj +1 more source
Energies, 2023 The results of selected volatile organic compounds (benzene, n-hexane, isopropanol, and formic acid) catalytic oxidation are presented on Fe2O3 cenospheres in the fluidised bed reactor.
Przemysław Migas +2 more
doaj +1 more source
Recovery of Cenospheres and Fine Fraction from Coal Fly Ash by a Novel Dry Separation Method
Energies, 2020 Aluminosilicate microspheres are a valuable fraction of coal fly ash with diverse applications due to their low density. Currently, there is no efficient and ecologically rational method of cenosphere recovery from fly ash.
Jan Wrona +3 more
doaj +1 more source
On the Influence of Contact Models on Friction Forces in Discrete Element Method Simulations
Chemical Engineering Transactions, 2021 The discrete element method (DEM) is an important tool to simulate granular systems with high accuracy. Depending on the application, it is often unclear which model is more appropriate for the calculation of collision forces: the Hertzian approach is ...
Filippo Marchelli, Renzo Di Felice
doaj +1 more source