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November 27, 2014 (v1)PublicationUploaded on: December 4, 2022
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February 1, 2018 (v1)Publication
Pyroclastic flows are characterized by their high mobility, which is often attributed to gas fluidization of the usually fine and/or low-density particles. However, the physical mechanism that might drive sustained fluidization of pyroclastic flows over extraordinarily long runout distances is elusive. In this letter it is proposed that a...
Uploaded on: March 27, 2023 -
July 17, 2017 (v1)Publication
This letter presents the results of numerical simulations of the buildup of a layer of colloidal particles on an electrode. In a low-frequency electric field, particles suspended in a low-conductivity liquid migrate to one electrode and then to the other. During each cycle, deposits are formed and dissipated. The current-voltage characteristics...
Uploaded on: March 27, 2023 -
January 30, 2018 (v1)Publication
Dynamical weakening of dense granular flows plays a critical role on diverse geological events such as seismic faulting and landslides. A common feature of these processes is the development of fluid-solid relative flows that could lead to fluidization by hydrodynamic viscous stresses. Volcanic ash landslides (pyroclastic flows) are...
Uploaded on: March 27, 2023 -
July 29, 2020 (v1)Publication
In this work we measure the mechanical strength of a bed of glass beads that has been previously subjected to a controlled flow of humid air by using a fluidized bed setup. The material is first initialized in a reproducible state by subjecting it to a high flow of dry air that drives the bed to bubbling. Then the gas flow is abruptly turned...
Uploaded on: March 27, 2023 -
November 4, 2022 (v1)Publication
Dispositivo y método para la medida de la conductividad eléctrica de líquidos altamente aislantes.La presente invención tiene por objeto un dispositivo y un método para medir la conductividad eléctrica de líquidos altamente aislantes. El dispositivo compr
Uploaded on: March 24, 2023 -
July 18, 2017 (v1)Publication
This paper presents an experimental and theoretical study of the dynamics of a conducting ball in a poorly conducting liquid subjected to an electric field. When the applied voltage is constant the ball bounces regularly on the lower electrode. If an AC voltage is superimposed, with a period equal to the unperturbed time between impacts, the...
Uploaded on: December 5, 2022 -
November 5, 2015 (v1)PublicationCohesion and Internal Friction of Fine Glass Beads as Affected by Small Intensity Vertical Vibration
We have used a novel centrifuge powder tester to obtain the angle of internal friction and cohesion of fine glass beads as affected by previous vibration in the vertical direction. In the experimental procedure we use a small amount of mass, typically between 2 and 4 grams, contained in a rectangular cell. The bed is initialized and subjected...
Uploaded on: March 27, 2023 -
April 30, 2018 (v1)Publication
A multi-species model consisting of seven species has been implemented to simulate the generation and development of Trichel pulses in oxygen between a sphere (the cathode) and a plane (the anode). The spatial and temporal evolution of species is obtained by solving the continuity equations of species using a classical one-dimensional model of...
Uploaded on: March 27, 2023 -
December 1, 2023 (v1)Publication
La presente invención tiene por objeto un procedimiento destinado a mejorar la fluidizabilidad de polvos finos cohesivos (tipo Geldart C) empleados en la adsorción de CO2 y en técnicas avanzadas de combustión basadas en lechos fluidos. El procedimiento propuesto consiste en mezclar el polvo fino cohesivo adsorbente de CO2 con un polvo...
Uploaded on: December 3, 2023 -
April 17, 2018 (v1)Publication
CaO has been deposited on a nanosilica powder matrix by a procedure based on atomic layer deposition (ALD) in a fluidized bed reactor at atmospheric pressure following a potentially scalable process. In previous works ALD in gas fluidized bed has been mostly performed under reduced pressure, which hampers scaling-up the production technology....
Uploaded on: March 27, 2023 -
September 14, 2021 (v1)Publication
The SMall Aspect Ratio Tokamak (SMART) device is a new compact (plasma major radius Rgeo≥0.40 m, minor radius a≥0.20 m, aspect ratio A≥1.7) spherical tokamak, currently in development at the University of Seville. The SMART device has been designed to achieve a magnetic field at the plasma center of up to Bϕ=1.0 T with plasma currents up to...
Uploaded on: March 24, 2023 -
April 29, 2022 (v1)Publication
EUROfusion Consortium 633053
Uploaded on: March 25, 2023