Results 1 to 10 of about 140,231 (211)

Turbulent dispersion in cloud-topped boundary layers [PDF]

open access: yesAtmospheric Chemistry and Physics, 2009
Compared to dry boundary layers, dispersion in cloud-topped boundary layers has received less attention. In this LES based numerical study we investigate the dispersion of a passive tracer in the form of Lagrangian particles for four kinds of atmospheric
R. A. Verzijlbergh   +3 more
doaj   +6 more sources

Similarity solutions of Prandtl mixing length modelled two dimensional turbulent boundary layer equations

open access: yesTheoretical and Applied Mechanics Letters, 2022
The exact similarity solutions of two dimensional laminar boundary layer were obtained by Blasius in 1908, however, for two dimensional turbulent boundary layers, no Blasius type similarity solutions (special exact solutions) have ever been found. In the
Bo-Hua Sun
doaj   +1 more source

Large Eddy Simulation of Hypersonic Turbulent Boundary Layers

open access: yesFluids, 2021
The recent revival of interest in developing new hypersonic vehicles brings attention to the need for accurate prediction of hypersonic flows by computational methods.
Nadia Kianvashrad, Doyle Knight
doaj   +1 more source

Numerical study of the effect of sidewalls on shock train behaviour

open access: yesFlow, 2023
Strongly coupled sequences of shock waves, known as shock trains, are present in high-speed propulsion systems, where the presence of sidewalls substantially modifies the boundary layer thickness, skin friction and streamwise pressure distribution.
Alexander Gillespie, Neil D. Sandham
doaj   +1 more source

Numerical Study of the Influence of the Inlet Turbulence Length Scale on the Turbulent Boundary Layer

open access: yesApplied Sciences, 2021
In the past half century, large eddy simulations (LESs) have played an important role in turbulent flow simulation and improving the performance of computing technology.
Young-Tae Lee   +2 more
doaj   +1 more source

Correlation between Large-Scale Streamwise Velocity Features and the Height of Coherent Vortices in a Turbulent Boundary Layer

open access: yesFluids, 2021
The preferential organisation of coherent vortices in a turbulent boundary layer in relation to local large-scale streamwise velocity features was investigated.
Shaurya Shrivastava, Theresa Saxton-Fox
doaj   +1 more source

Hot-wire experimental investigation on turbulent Prandtl number in a rotating non-isothermal turbulent boundary layer

open access: yesPropulsion and Power Research, 2020
This experiment used a parallel array of hot wire probes to simultaneously measure the temperature and velocity fields in the non-isothermal turbulent boundary layer of a rotating straight channel. The Reynolds numbers are 15,000 and 25,000, respectively.
Ran Gao   +4 more
doaj   +1 more source

Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration

open access: yesScientific Reports, 2021
With the aim for a low-aspect-ratio flying wing configuration, this study explores the influence of wall temperature gradient on the laminar and turbulent boundary layers of aircraft surface and determines the effect on the transition Reynolds number and
Peng Lin   +6 more
doaj   +1 more source

Minimalist turbulent boundary layer model [PDF]

open access: yesPhysical Review E, 2009
We introduce an elementary model of a turbulent boundary layer over a flat surface, given as a vertical random distribution of spanwise Lamb-Oseen vortex configurations placed over a non-slip boundary condition line. We are able to reproduce several important features of realistic flows, such as the viscous and logarithmic boundary sublayers, and the ...
openaire   +3 more sources

Spatial DNS of an Isothermal Flat Plate Supersonic Turbulent Boundary Layer with/out Impinging Shock Wave

open access: yesJournal of Fluid Science and Technology, 2011
Spatial direct numerical simulation results are presented for transitional/turbulent supersonic isothermal flat plate boundary layers at M = 2.0 and impinging shock wave-boundary layer interactions.
Yusuke TOKURA, Hiroshi MAEKWA
doaj   +1 more source

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