Results 21 to 30 of about 21,769 (265)
Nonperturbative estimate of the heavy quark momentum diffusion coefficient [PDF]
Physical Review D, 2015 We estimate the momentum diffusion coefficient of a heavy quark within a pure SU(3) plasma at a temperature of about 1.5Tc. Large-scale Monte Carlo simulations on a series of lattices extending up to 192^3*48 permit us to carry out a continuum extrapolation of the so-called colour-electric imaginary-time correlator.
Francis, A. +4 more
openaire +4 more sources
Comparison of momentum transport in matched hydrogen and deuterium H-mode plasmas in ASDEX Upgrade
Nuclear Fusion, 2023 Advanced momentum transport analysis is used to study matched hydrogen (H) and deuterium (D) plasmas in the core of ASDEX Upgrade. The aim is to validate gyrokinetic theory and assess a possible isotope dependence.
C.F.B. Zimmermann +11 more
doaj +1 more source
Diffusion and Superdiffusion in Lattice Models for Colliding Particles with Stored Momentum [PDF]
Journal of Statistical Physics, 2019 Abstract We introduce two discrete models of a collection of colliding particles with stored momentum and study the asymptotic growth of the mean-square displacement of an active particle. We prove that the models are superdiffusive in one dimension (with power law correction) and diffusive in three and higher dimensions.
Edward Crane, Sean Ledger, Bálint Tóth
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Process of phonon diffusion through crystalline structures [PDF]
NBP: Nauka, bezbednost, policija, 2017 Instead of usual approach, applying displacement-displacement Green’s functions, the momentum-momentum Green’s functions will be used to calculate the diffusion tensor. These functions enter into Kubo’s formula defining diffusion properties of the system.
Šetrajčić Jovan P. +2 more
doaj
Non-diffusive angular momentum transport in rotating -pinches [PDF]
Journal of Plasma Physics, 2019 The stability of conducting Taylor–Couette flows under the presence of toroidal magnetic background fields is considered. For strong enough magnetic amplitudes such magnetohydrodynamic flows are unstable against non-axisymmetric perturbations which may also transport angular momentum.
G. Rüdiger, M. Schultz
openaire +2 more sources
Hybrid fluid-kinetic model for neutral particles in the plasma edge
Nuclear Materials and Energy, 2019 We elaborate a hybrid fluid-kinetic model for neutral particles in the plasma edge. A macro/fluid model with kinetic corrections in the closure terms of the fluid moment equations is solved in the entire domain.
N. Horsten, G. Samaey, M. Baelmans
doaj +1 more source
Lattice study of a magnetic contribution to heavy quark momentum diffusion
Journal of High Energy Physics, 2022 Heavy quarks placed within a hot QCD medium undergo Brownian motion, characterized by specific transport coefficients. Their determination can be simplified by expanding them in T/M, where T is the temperature and M is a heavy quark mass.
D. Banerjee, S. Datta, M. Laine
doaj +1 more source
The Astrophysical Journal, 2023 A recently developed time-dependent fractional Parker transport equation is solved to investigate the parallel and momentum superdiffusion of energetic charged particles in an inner heliospheric region containing dynamic small-scale flux ropes (SMFRs ...
J. A. le Roux
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Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying
Advanced Engineering Materials, EarlyView.An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara +8 more
wiley +1 more source
Diffusion of heavy quarks in the early stage of high-energy nuclear collisions [PDF]
EPJ Web of ConferencesWe study the diffusion of heavy quarks in the early stage of highenergy nuclear collisions. The pre-equilibrium stage of relativistic heavy-ion collisions, commonly known as Glasma, evolves according to the classical Yang-Mills equations.
Pooja +3 more
doaj +1 more source