Results 51 to 60 of about 3,974 (207)

Coupling Fluid Neutrals to Gyrokinetic Plasma Dynamics for Edge and SOL Turbulence Simulations

Contributions to Plasma Physics, EarlyView.
ABSTRACT Accurate modeling of turbulent transport in magnetic confinement fusion devices requires extending first‐principles gyrokinetic simulations from the core to the edge and scrape‐off layer (SOL), where additional physics—particularly plasma–neutrals interactions—must be included.
Sabine Ogier‐Collin, Philipp Ulbl, Wladimir Zholobenko, Frank Jenko   +3 more
wiley   +1 more source

Thermal Conduction in Laser‐Driven Tin Plasmas and the Sensitivity of Plasma Properties to the Flux Limiter

Contributions to Plasma Physics, EarlyView.
ABSTRACT We study the role of thermal conduction in laser‐produced tin plasma sources of extreme ultraviolet (EUV) light using radiation‐hydrodynamic simulations. Adopting the flux‐limited Spitzer–Härm approach, we investigate the sensitivity of the electron temperature, electron density, net in‐band emissivity, and conversion efficiency to the choice ...
S. Aggarwal, J. Gonzalez, S. J. J. de Lange, J. Sheil   +3 more
wiley   +1 more source

Interpretação do mecanismo de difusão no processo gás-sólido da reação de dessulfurização

Química Nova, 2010
The present paper aims to interpret the SO2 diffusion mechanism process for two different limestones: a calcite and a dolomite. In previous study, the apparent activation energies for sulfation reaction were between 3.03 and 4.45 kJ mol-1 for the calcite,
Daniela Andresa Mortari, Paula Manoel Crnkovic, Ivonete Ávila, Fernando Eduardo Milioli   +3 more
doaj   +1 more source

Gas diffusion in microporous media in Knudsen's regime.

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1983
A diffusion equation for gas permeation through microporous media in the Knudsen regime was obtained theoretically, considering the potential energy between a gas molecule and the solid surface of pores. The equation as a function of temperature contains four parameters, all of which have physical meanings.
SHINDO, YUJI, HAKUTA, TOSHIKATSU, YOSHITOME, HIROSHI, INOUE, HAKUAI   +3 more
openaire   +2 more sources

Effect of Microchannel Geometry on Nanoparticle Deposition in Nanofluid Flow

International Journal for Numerical Methods in Fluids, EarlyView.
This study numerically analyzed nanoparticle deposition in microchannels with varying geometries. Deposition per unit area decreases significantly with increasing bend angle (28.612 to 8.941 between 30° and 120°) and bend radius (11.922 to 4.769 between 0.2 and 0.4 mm). Acute bends and small radii enhance centrifugal forces and flow separation, leading
Meng Wang, Kai Zhang, Juanli Zhang, Jay Wang   +3 more
wiley   +1 more source

Knudsen Diffusion in the Sequentially Linked Spherical Pore.

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1998
Molecular dynamics (MD) simulations have been carried out to investigate the Knudsen diffusion properties for the non-adsorbed, collisionless molecules confined within the one-dimensional model pore system, namely, the sequentially linked spherical pore.
Suh, Soong-Hyuck, Heo, Nam-Ho, Nicholson, David   +2 more
openaire   +1 more source

Cosine law at the atomic scale: Toward realistic simulations of Knudsen diffusion [PDF]

Physical Review E, 2008
We propose to revisit the diffusion of atoms in the Knudsen regime in terms of a complex dynamical reflection process. By means of molecular dynamics simulation we emphasize the asymptotic nature of the cosine law of reflection at the atomic scale, and carefully analyze the resulting strong correlations in the reflection events.
Celestini, Franck, Mortessagne, Fabrice
openaire   +3 more sources

Exocrine Gland Dysfunction in Parkinson's Disease: Pathophysiology, Clinical Manifestations, and Therapeutic Perspectives—A Narrative Review

Movement Disorders Clinical Practice, EarlyView.
Abstract Background Non‐motor symptoms, especially autonomic dysfunction, are major contributors to disability and decreased quality of life in Parkinson's disease (PD). Despite being common and having a wide range of clinical facets, exocrine gland dysfunction is still not well recognized and managed.
Renato P. Munhoz, Marina Farah, Laura Silveira‐Moriyama   +2 more
wiley   +1 more source

Editorial: Rarefied Gas Flows—From Micro–Nano Scale to the Hypersonic Regime

Fluids
Rarefied gas dynamics spans a wide spectrum of applications: micro–nano devices where the mean free path becomes comparable to characteristic lengths, vacuum and porous systems where Knudsen diffusion emerges, and high-speed (including hypersonic) flows ...
Ehsan Roohi
doaj   +1 more source

H₂O₂-Enhanced Shale Gas Recovery under Different Thermal Conditions

Energies, 2019
The permeability of tight shale formations varies from micro-Darcy to nano-Darcy. Recently, hydrogen peroxide (H2O2) was tested as an oxidizer to remove the organic matter in the rock in order to increase shale permeability.
WeiGang Yu, Jiang Lei, Tengxi Wang, Wei Chen   +3 more
doaj   +1 more source