Results 61 to 70 of about 995,745 (408)

A Fluid-Dynamical Subgrid Scale Model for Highly Compressible Astrophysical Turbulence [PDF]

, 2010
We formulate and implement the Euler equations with SGS dynamics and provide numerical tests of an SGS turbulence energy model that predicts the turbulent pressure of unresolved velocity fluctuations and the rate of dissipation for highly compressible ...
Agertz, Benzi, Bonazzola, Bonazzola, Burkert, C. Federrath, Cen, Chandrasekhar, Colella, Dobbs, Federrath, Federrath, Federrath, Federrath, Fureby, Germano, Iapichino, Ishihara, Joung, Joung, Kritsuk, Krumholz, Mac Low, Maier, Murante, Oppenheimer, Pan, Price, Ryu, Sarkar, Scannapieco, Schmidt, Schmidt, Schmidt, Schmidt, Schmidt, Springel, Subramanian, Tasker, Truelove, W. Schmidt, Woodward, Zhu   +42 more
core   +3 more sources

Geophysical turbulence data and turbulence theory [PDF]

Nonlinear Processes in Geophysics, 1996
Abstract. Many vital insights into the nature of turbulence in fluids have originated from experimental data obtained in geophysical flows. Geophysical data have often helped to stimulate the creation of new turbulence theory, while theory has in many cases motivated the experimental efforts.
openaire   +6 more sources

Lectures on turbulence

Physics Reports, 2023
Fluid dynamics turbulence refers to the chaotic and unpredictable dynamics of flows. Despite the fact that the equations governing the motion of fluids are known since more than two centuries, a comprehensive theory of turbulence is still a challenge for the scientific community.
Benzi, Roberto, Toschi, Federico
openaire   +1 more source

A computational framework for physics-informed symbolic regression with straightforward integration of domain knowledge

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, Alex Liberzon, Teddy Lazebnik   +2 more
doaj   +1 more source

Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High‐Power Laser Beam Welding

Advanced Engineering Materials, EarlyView.
Temporal power modulation increases weld depth in high‐power laser beam welding of dissimilar round bars by nearly 20% compared to same average continuously welded welding power. The mechanism of action also applies to sheet welding and depends on the inertia of keyhole depth for the modulated laser beam power.
Jan Grajczak, David Reynders, Christian Nowroth, Jens Twiefel, Jörg Wallaschek, Sarah Nothdurft, Jörg Hermsdorf, Stefan Kaierle   +7 more
wiley   +1 more source

Turbulent transport and dynamo in sheared MHD turbulence with a non-uniform magnetic field [PDF]

, 2009
We investigate three-dimensional magnetohydrodynamics turbulence in the presence of both a large-scale velocity and non-uniform magnetic field. By assuming a turbulence driven by an external forcing with both helical and non-helical spectra, we investigate the combined effect of these two shears on turbulence intensity and turbulent transport ...
arxiv   +1 more source

Study of the atmospheric turbulence in free space optical communications [PDF]

, 2009
-In this paper the effect of atmospheric turbulence on free space optical (FSO) communications is investigated experimentally by designing a turbulence simulation chamber.
Fan, Z., Ghassemlooy, Zabih, Ijaz, Muhammad, Popoola, Wasiu Oyewole, Wu, Shan   +4 more
core   +1 more source

Multi-scale analysis of turbulence evolution in the density stratified intracluster medium

, 2018
The diffuse hot medium inside clusters of galaxies typically exhibits turbulent motions whose amplitude increases with radius, as revealed by cosmological hydrodynamical simulations. However, its physical origin remains unclear. It could either be due to
Lau, Erwin, Nagai, Daisuke, Shi, Xun
core   +1 more source

Simulation of Inhomogeneous Refractive Index Fields Induced by Hot Tailored Forming Components

Advanced Engineering Materials, EarlyView.
This article presents a simulation model for simulating inhomogeneous refractive index fields (IRIF) in hot‐forged components, accounting for thermal influences and complex geometries. Through this simulation, a priori knowledge about the propagation of the IRIF can be obtained, allowing for the positioning of the component or an optical measurement ...
Pascal Kern, Lennart Hinz, Markus Kästner, Eduard Reithmeier   +3 more
wiley   +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