Results 11 to 20 of about 319,516 (295)

Evaluation of Computational Methodologies for Accurate Prediction of Wall Shear Stress and Turbulence Parameters in a Patient-Specific Aorta

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
Background: Recent studies suggest that blood flow in main arteries is intrinsically disturbed, even under healthy conditions. Despite this, many computational fluid dynamics (CFD) analyses of aortic haemodynamics make the assumption of laminar flow, and
Emily Louise Manchester   +5 more
doaj   +1 more source

Gliding swifts attain laminar flow over rough wings. [PDF]

open access: yesPLoS ONE, 2014
Swifts are among the most aerodynamically refined gliding birds. However, the overlapping vanes and protruding shafts of their primary feathers make swift wings remarkably rough for their size.
David Lentink, Roeland de Kat
doaj   +1 more source

Research Progress of the High-lift Device Design for Laminar Wing

open access: yesHangkong gongcheng jinzhan, 2021
The lift device design of laminar flow wing can reduce drag and noise.By combining the low resistance laminar flow area with the high-efficiency lift device and adopting the effective shape design and appropriate structure selection,the expansion of ...
LI Yunpeng, HAN Yongzhi
doaj   +1 more source

Fluorescence imaging of arterial blood spiral laminar flow of rats [PDF]

open access: yesJichu yixue yu linchuang, 2023
Objective To estatblish a real-time fluorescence imaging method for observing arterial blood spiral laminar flow. Methods Sprague Dawley rats were randomly divided into vein angiography group (femoral vein injection, 1 mL/kg) and low-dose arteriography ...
QI Xi, LI Bei, LI Hongyi, LI Yansong, ZHAO Lihao, HAO You, YU Xue
doaj   +1 more source

A mathematical clue to the separation phenomena on the two-dimensional Navier-Stokes equation [PDF]

open access: yes, 2012
In general, before separating from a boundary, the flow moves toward reverse direction near the boundary against the laminar flow direction. Here in this paper, a clue to such reverse flow phenomena (in the mathematical sense) is observed. More precisely,
Yoneda, Tsuyoshi
core   +2 more sources

Enhanced drag in pipe turbulent flow by an aqueous electrolyte: an electroviscous effect [PDF]

open access: yes, 2009
Drag enhancement is reported for turbulent pipe flow of aqueous electrolyte solutions. No electroviscous effect was obtained with laminar flow. Nor was any unusual pressure drop observed for laminar or turbulent flow of non-electrolyte aqueous solutions ...
Bénard, Emmanuel   +3 more
core   +1 more source

Flat bubble regime and laminar plasma flow in a plasma wakefield accelerator

open access: yesPhysical Review Accelerators and Beams, 2022
A simple 2D model of the bubble formation in a plasma wakefield accelerator is developed and investigated. We show that in the case of a flat driver, the bubble may consist of two parts.
S. S. Baturin
doaj   +1 more source

Contactless Localization of Premature Laminar–Turbulent Flow Transitions on Wind Turbine Rotor Blades in Operation

open access: yesApplied Sciences, 2020
Thermographic flow visualization enables a noninvasive detection of the laminar–turbulent flow transition and allows a measurement of the impact of surface erosion and contamination due to insects, rain, dust, or hail by quantifying the amount of laminar
Daniel Gleichauf   +2 more
doaj   +1 more source

On the stationary Navier-Stokes flow with isotropic streamlines in all latitudes on a sphere or a 2D hyperbolic space [PDF]

open access: yes, 2013
In this paper, we show the existence of real-analytic stationary Navier-Stokes flows with isotropic streamlines in all latitudes in some simply-connected flow region on a rotating round sphere.
Chan, Chi Hin, Yoneda, Tsuyoshi
core   +2 more sources

Experimental Study on Liquid Flow and Heat Transfer in Rough Microchannels

open access: yesAdvances in Condensed Matter Physics, 2019
Although roughness is negligible for laminar flow through tubes in classic fluid mechanics, the surface roughness may play an important role in microscale fluid flow due to the large ratio of surface area to volume.
Xuan Zhang   +3 more
doaj   +1 more source

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