Results 101 to 110 of about 9,203 (285)

Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory

Geophysical Research Letters
Hypotheses involving energetic constraints and the down‐gradient diffusion of heat in eddy parameterization theories are tested by estimating baroclinic eddy transports in rotating annulus laboratory experiments. Particle Imaging Velocimetry measurements
Cheng Qian, Peter L. Read, David P. Marshall   +2 more
doaj   +1 more source

The Relationship between Vertical Kinematic Eddy Heat Flux, Air Temperature and Turbulent Kinetic Energy in Atmospheric Boundary Layer: Baghdad City

Al-Mustansiriyah Journal of Science
Studying the heat flux in the boundary layer and understanding its relationship to the various atmospheric variables reflects positively on understanding the nature of turbulence in this layer and thus understanding the nature of the spread and movement
Nagham Abbas Mohammed
doaj   +1 more source

5D Flow MRI Reveals Respiration‐Driven Changes in Blood Flow Energetics in Congenital Heart Disease

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Hemodynamic monitoring is essential for patients with right‐sided congenital heart disease (CHD). Respiration may have an increased impact on pulmonary flow in these patients that cannot be assessed by standard tools including 4D flow MRI. This study uses 5D flow MRI to assess respiratory‐cycle variations in flow energetics in patients
Thara Nallamothu, Elizabeth K. Weiss, Justin Baraboo, Joshua D. Robinson, Cynthia K. Rigsby, Christopher W. Roy, Matthias Stuber, Michael Markl   +7 more
wiley   +1 more source

Simulations of eddy kinetic energy transport in barotropic turbulence

Physical Review Fluids, 2017
Spatially localized stochastic forcing generates turbulent dynamics in a 2D fluid with a uniform background vorticity gradient, enabling a study of the turbulent transport of kinetic energy.
openaire   +2 more sources

Pretreatment Effects of Conventional and Reactive Extrusion on LLDPE Waste Pyrolysis

Polymer Engineering &Science, EarlyView.
Schematic overview of the pyrolysis study using original and pretreated LLDPE waste samples. Pretreatment was performed via twin‐screw extrusion at 450°C: without additives (REX), with peroxide (REX‐RO2), or with polypropylene (REX–PP). All four samples underwent pyrolysis at 450°C–475°C for 15–45 min.
Yasmin Fialho Siqueira, Débora M. V. Miranda, Larissa L. A. Carvalho, Natasha K. Sitton, Ana Paula de Azeredo, Regina F. Nonemacher, Raquel S. Mauler, Luiz Eduardo P. Borges, José Carlos Pinto   +8 more
wiley   +1 more source

Effect of internal vortex structures in nozzles on energy conversion efficiency of self-excited pulsed SC-CO2 jets

Meitan xuebao
The utilization of high-speed jet technology to fracture coal bodies and construct gas flow channels within coal seams is a crucial method for enhancing coalbed methane recovery efficiency. The supercritical carbon dioxide (SC-CO2) jet enhances coal-seam
Jianping WEI, Gangxia JING, Yong LIU, Huidong ZHANG, Mengya GAO, Xiang LI, Shiyan LI, Changjiang CHEN   +7 more
doaj   +1 more source

Turbulent Kinetic Energy Production in the Vane of a Low-Pressure Linear Turbine Cascade with Incoming Wakes

International Journal of Rotating Machinery, 2015
Incompressible large eddy simulation and direct numerical simulation of a low-pressure turbine at Re=5.18×104 and 1.48×105 with discrete incoming wakes are analyzed to identify the turbulent kinetic energy generation mechanism outside of the blade ...
V. Michelassi, J. G. Wissink
doaj   +1 more source

Scaling properties of velocity and temperature spectra above the surface friction layer in a convective atmospheric boundary layer [PDF]

, 2007
We report velocity and temperature spectra measured at nine levels from 1.42 meters up to 25.7 m over a smooth playa in Western Utah. Data are from highly convective conditions when the magnitude of the Obukhov length (our proxy for the depth of the ...
Clement, R. J., Moncrieff, J. B., K. G. McNaughton, R. J. Clement, J. B. Moncrieff, McNaughton, K. G.   +5 more
core   +1 more source

Ultrasound‐Assisted Epoxy Resin Curing Monitored by Impedance Spectroscopy

Polymer Engineering &Science, EarlyView.
Ultrasound enhances epoxy cure rates via localized heating without altering cure kinetics. Impedance spectroscopy provides a direct, non‐destructive measure of cure progression, enabling accurate mapping of degree of cure in real time. ABSTRACT Epoxy resins are widely used in aerospace and automotive manufacturing as structural adhesives and matrices ...
Daniel Csehngeri, Anoush Poursartip, Edmond Cretu   +2 more
wiley   +1 more source

Experimental and Modeling Investigation of Seawater Hydrolysis Effects on Aramid Fiber Rupture Behavior

Journal of Polymer Science, EarlyView.
Hydrolytic aging in seawater produces markedly different mechanical responses among commercial Aramid fibers. While some fibers exhibit progressive degradation, others maintain stable or even improved tensile behavior. Experimental yarn‐scale testing combined with mathematical degradation modeling and Arrhenius‐based lifetime prediction provides new ...
Daniel Magalhães da Cruz, Ignacio Melito, Tales Luiz Popiolek Júnior, Jakson Manfredini Vassoler, Felipe Tempel Stumpf, Fernanda Mazuco Clain, Carlos Eduardo Marcos Guilherme   +6 more
wiley   +1 more source