Results 31 to 40 of about 292,116 (302)

Exploring the phase space of multiple states in highly turbulent Taylor-Couette flow [PDF]

open access: yes, 2016
We investigate the existence of multiple turbulent states in highly turbulent Taylor-Couette flow in the range of $\mathrm{Ta}=10^{11}$ to $9\cdot10^{12}$, by measuring the global torques and the local velocities while probing the phase space spanned by ...
Dung, On-Yu   +5 more
core   +4 more sources

Characterization of Turbulent Flow Behind a Transcatheter Aortic Valve in Different Implantation Positions

open access: yesFrontiers in Cardiovascular Medicine, 2022
The development of turbulence after transcatheter aortic valve (TAV) implantation may have detrimental effects on the long-term performance and durability of the valves.
Leonardo Pietrasanta   +5 more
doaj   +1 more source

Speed and structure of turbulent fronts in pipe flow [PDF]

open access: yes, 2017
Using extensive direct numerical simulations, the dynamics of laminar-turbulent fronts in pipe flow is investigated for Reynolds numbers between $Re=2000$ and $5500$.
Avila, Marc   +3 more
core   +2 more sources

Large-Scale Flow Structure in Turbulent Poiseuille Flows at Low-Reynolds Numbers

open access: yesJournal of Fluid Science and Technology, 2012
Direct numerical simulations of a spectral method are performed to study the turbulent channel flow at the low-Reynolds numbers, where the quasi-laminar and turbulent regions simultaneously appear and form the stripe pattern, which is floated downstream ...
Koji FUKUDOME, Oaki IIDA
doaj   +1 more source

The concept of turbulent «vortex backfill» - models and methods. Power engineering: research, equipment, technology

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2019
Models and methods for studying turbulence based on the concept of turbulent "vortex backfill" are presented. The essence of this concept is that the turbulent flow is considered as laminar, flowing through a "vortex backfill ", which creates internal ...
L. E. Melamed, G. A. Filippov
doaj   +1 more source

Multiscale structure of turbulent channel flow and polymer, dynamics in viscoelastic turbulence [PDF]

open access: yes, 2010
This thesis focuses on two important issues in turbulence theory of wall-bounded flows. One is the recent debate on the form of the mean velocity profile (is it a log-law or a power-law with very weak power exponent?) and on its scalings with Reynolds
Dallas, Vassilios, Dallas, Vassilios
core   +1 more source

Comparative analysis of drag reduction characteristics of two-type riblets based on numerical simulation

open access: yesXibei Gongye Daxue Xuebao, 2022
Turbulent drag reduction has always been a hot issue in fluid mechanics. Among various turbulent drag reduction methods, riblets has attracted wide attention due to its simple structure and convenient application.
DU Shuya, SANG Weimin, PANG Run
doaj   +1 more source

TEMPORO-SPECTRAL COHERENT STRUCTURE OF TURBULENCE AND PRESSURE USING FOURIER AND WAVELET TRANSFORMS

open access: yesASEAN Journal on Science and Technology for Development, 2017
Studying the spatial distribution in coherent fields such as turbulent and turbulent-induced force ones is important to model and evaluate turbulent-induced forces and response of structures on the turbulent flows. Turbulent field-based coherent function
Thai-Hoa Le, Dong-Anh Nguyen
doaj   +1 more source

Distribution of velocity and turbulent characteristics in coarse-sediment laden flows above erodible plane bed in open channel

open access: yesEPJ Web of Conferences, 2016
Extreme conditions as flash floods in steep mobile-bed streams induce flows which carry a huge amount of sediment. Typically, the flow with the intense transport of sediment is stratified with a layered structure above an erodible plane bed.
Zrostlík Štěpán   +4 more
doaj   +1 more source

Flow-turbulence interaction in magnetic reconnection

open access: yes, 2011
Roles of turbulence in the context of magnetic reconnection are investigated with special emphasis on the mutual interaction between flow (large-scale inhomogeneous structure) and turbulence. In order to evaluate the effective transport due to turbulence,
Hoshino, Masahiro, Yokoi, Nobumitsu
core   +1 more source

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