Results 31 to 40 of about 13,563,281 (204)

Continuous Reynolds number effect analysis of the influence of vortex generator on the aerodynamic performance of airfoil [PDF]

open access: yesJournal of Hebei University of Science and Technology
In order to effectively improve the power generation efficiency of large wind turbines, studies on the optimization measures for the aerodynamic performance of wind turbine airfoils were conducted. Wind tunnel experiments were conducted to systematically
Yaya JIA   +4 more
doaj   +1 more source

Skin-Friction-Based Identification of the Critical Lines in a Transonic, High Reynolds Number Flow via Temperature-Sensitive Paint

open access: yesSensors, 2021
In this contribution, three methodologies based on temperature-sensitive paint (TSP) data were further developed and applied for the optical determination of the critical locations of flow separation and reattachment in compressible, high Reynolds number
Marco Costantini   +3 more
doaj   +1 more source

Comparison of a grid-based CFD method and vortex dynamics predictions of low Reynolds number cylinder flow [PDF]

open access: yes, 2006
Computational fluid dynamics models range from the finite difference type grid-based method to the Lagrangian style vortex cloud simulation technique for solving the Navier-Stokes equations.
Lewis, R. I., Baranyi, László
core   +2 more sources

Controlling critical Reynolds number of plate flow by boundary input parallel

open access: yes, 2007
Purpose - The aim of this study is to modify the critical Reynolds number (Re-cr which is the critical parameter of the transition from laminar to turbulence regime.
Uzal, Erol, Kucur, Murad
core   +1 more source

Numerical Study of Mixed Convection and Heat Transfer in Arc-Shaped Cavity with Inner Heat Sources

open access: yesApplied Sciences, 2023
The mixed convection and heat transfer in enclosures with inner heat sources widely exist in building ventilation, cooling of nuclear reactors and cooling of electronic components.
Huimin Cui   +7 more
doaj   +1 more source

Mechanism of Drag Reduction by Dimple Structures on a Sphere

open access: yesJournal of Fluid Science and Technology, 2012
The purpose of the present study is to clarify the mechanism of drag reduction for a sphere with arc type dimples. The sphere has 328 dimples of different depths uniformly distributed on its surface.
Katsumi AOKI, Koji MUTO, Hiroo OKANAGA
doaj   +1 more source

The critical Reynolds number of a laminar mixing layer

open access: yes, 2006
It has hitherto been widely considered that a mixing layer is unstable at all Reynolds numbers. However this is untenable from energy considerations, which demand that there must exist a non-zero Reynolds number below which disturbances cannot extract energy from the mean flow.
Bhattacharya, Pinaki   +3 more
openaire   +2 more sources

Reynolds number of transition and self-organized criticality of strong turbulence [PDF]

open access: yesPhysical Review E, 2014
A turbulent flow is characterized by velocity fluctuations excited in an extremely broad interval of wave numbers k>Λf, where Λf is a relatively small set of the wave vectors where energy is pumped into fluid by external forces.
openaire   +2 more sources

Critical Reynolds Number Estimates by Thermo-Dynamic (Stochastic) Methods

open access: yes, 1974
Methods based on fundamental thermodynamic principles and the notion of statistical probability have been used to estimate the point of instability and the lower critical Reynolds number for a round pipe and an infinite channel.
M. J. Levy, P. Hrycak
core   +1 more source

Stationary bifurcation and heatline visualisation in a rectangular cavity with anti –parallel wall motions

open access: yesDiscover Mechanical Engineering
The effect of aspect ratio (τ) on stationary bifurcations corresponding to mixed convective flow in a four – sided lid – driven rectangular porous cavity is studied numerically.
Mrittika Das, Hari Ponnamma Rani
doaj   +1 more source

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