Results 51 to 60 of about 628,643 (214)
Turbulent thermalization [PDF]
Physical Review D, 2004 We study, analytically and with lattice simulations, the decay of coherent field oscillations and the subsequent thermalization of the resulting stochastic classical wave-field. The problem of reheating of the Universe after inflation constitutes our prime motivation and application of the results. We identify three different stages of these processes.
Raphael Micha, Igor Tkachev
openaire +2 more sources
Archimedes’ law explains penetration of solids into granular media
Nature Communications, 2018 The penetration dynamics of solid objects into granular media has been described by theories that are constrained to the use of phenomenological models or empirical parameters. Here, Kang et al.
Wenting Kang +3 more
doaj +1 more source
Scientific Reports, 2023 Discovering a meaningful symbolic expression that explains experimental data is a fundamental challenge in many scientific fields. We present a novel, open-source computational framework called Scientist-Machine Equation Detector (SciMED), which ...
Liron Simon Keren +2 more
doaj +1 more source
Is the subdominant part of the energy spectrum due to downscale energy cascade hidden in quasi-geostrophic turbulence? [PDF]
, 2006 In systems governing two-dimensional turbulence, surface quasi-geostrophic turbulence, (more generally $\alpha$-turbulence), two-layer quasi-geostrophic turbulence, etc., there often exist two conservative quadratic quantities, one ``energy''-like and ...
Gkioulekas, Eleftherios, Tung, Ka Kit
core +6 more sources
POD Analysis of the Wake of Two Tandem Square Cylinders
FluidsThis study aims to investigate the wake of two tandem square cylinders based on the Proper Orthogonal Decomposition (POD) analyses of the PIV and hotwire data. The cylinder centre-to-centre spacing ratio L/w examined is from 1.2 to 4.2, covering the four
Jingcheng Hao +4 more
doaj +1 more source
Turbulent jet interaction with a long rise-time pressure signature [PDF]
, 2016 A sonic boom signature with a long rise time has the ability to reduce the sonic boom, but it does not necessarily minimize the sonic boom at the ground level because of the real atmospheric turbulence.
Obayashi, Shigeru +2 more
core +1 more source
Nonlinear wave in granular systems based on elastoplastic dashpot model
International Journal of Mechanical System Dynamics, 2021 The dynamic dashpot models are widely used in EDEM commercial software. However, most dashpot models suffer from a serious numerical issue in calculating the granular chain because the denominator of damping force includes the initial impact velocity ...
Gengxiang Wang, Caishan Liu
doaj +1 more source
Numerical Simulation of a High-Speed Impact of Metal Plates Using a Three-Fluid Model
Metals, 2021 The process of wave formation at the contact boundary of colliding metal plates is a fundamental basis of explosive welding technology. In this case, the metals are in a pseudo-liquid state at the initial stages of the process, and from a mathematical ...
Petr Chuprov +2 more
doaj +1 more source
Intrinsic rotation in tokamaks: theory [PDF]
, 2015 Self-consistent equations for intrinsic rotation in tokamaks with small poloidal magnetic field $B_p$ compared to the total magnetic field $B$ are derived.
Barnes, Michael, Parra, Felix I.
core +1 more source
Numerical Studies of Quantum Turbulence [PDF]
J. Low. Temp. Phys. 188, 119 (2017), 2017 We review numerical studies of quantum turbulence. Quantum turbulence is currently one of the most important problems in low temperature physics and is actively studied for superfluid helium and atomic Bose--Einstein condensates. A key aspect of quantum turbulence is the dynamics of condensates and quantized vortices. The dynamics of quantized vortices
arxiv +1 more source