Results 81 to 90 of about 908,603 (199)

On optical imaging through aircraft turbulent boundary layers [PDF]

, 1980
Optical resolution quality as affected by aircraft turbulent boundary layers is analyzed. Wind-tunnel data was analyzed to obtained the variation of boundary layer turbulence scale length and mass density rms fluctuations with Mach number.
Sutton, G. W.
core   +1 more source

Cubic-like Features of I–V Relations via Classical Poisson–Nernst–Planck Systems Under Relaxed Electroneutrality Boundary Conditions

Axioms
We focus on higher-order matched asymptotic expansions of a one-dimensional classical Poisson–Nernst–Planck system for ionic flow through membrane channels with two oppositely charged ion species under relaxed electroneutrality boundary conditions.
Hong Li, Zhantao Li, Chaohong Pan, Jie Song, Mingji Zhang   +4 more
doaj   +1 more source

Control of supersonic wind-tunnel noise by laminarization of nozzle-wall boundary layer [PDF]

One of the principal design requirements for a quiet supersonic or hypersonic wind tunnel is to maintain laminar boundary layers on the nozzle walls and thereby reduce disturbance levels in the test flow.
Beckwith, I. E., Harris, J. E., Harvey, W. D., Holley, B. B.   +3 more
core   +1 more source

Dynamics of the Storm Time Magnetopause and Magnetosheath Boundary Layers: An MMS‐THEMIS Conjunction

Geophysical Research Letters
This letter uses simultaneous observations from Magnetosphere Multiscale (MMS) and Time History of Events and Macroscale Interactions during Substorms (THEMIS) to address the dynamics of the magnetopause and magnetosheath boundary layers during the main ...
Rachel C. Rice, Li‐Jen Chen, Dan Gershman, Stephen A. Fuselier, Brandon L. Burkholder, Harsha Gurram, Jason Beedle, Jason Shuster, Steven M. Petrinec, Craig Pollock, Ian Cohen, Christine Gabrielse, Philippe Escoubet, James Burch   +13 more
doaj   +1 more source

Numerical study of supersonic turbulent flow over small protuberances [PDF]

Supersonic turbulent boundary layers over two-dimensional protuberances are investigated, using the numerical finite difference alternating direction implicit (ADI) method. The turbulence is modeled mathematically.
Polak, A., Werle, M. J.
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Bypass transition in compressible boundary layers [PDF]

Transition to turbulence in aerospace applications usually occurs in a strongly disturbed environment. For instance, the effects of free-stream turbulence, roughness and obstacles in the boundary layer strongly influence transition.
Vandervegt, J. J.
core   +1 more source

Gas Kinetic Scheme Coupled with High-Speed Modifications for Hypersonic Transition Flow Simulations

Entropy
The issue of hypersonic boundary layer transition prediction is a critical aerodynamic concern that must be addressed during the aerodynamic design process of high-speed vehicles. In this context, we propose an advanced mesoscopic method that couples the
Chengrui Li, Wenwen Zhao, Hualin Liu, Youtao Xue, Yuxin Yang, Weifang Chen   +5 more
doaj   +1 more source

Further studies of the coupled chemically reacting boundary layer and charring ablator. Part 1 - Summary Final report [PDF]

Computer program development for charring ablative materials, chemically reacting laminar boundary layers, and turbulent boundary layer ...
Anderson, L. W., Bartlett, E. P., Kendall, R. M., Nicolet, W. E.   +3 more
core   +1 more source

A Cubic Spline Numerical Method for a Singularly Perturbed Two-Parameter Ordinary Differential Equation

Axioms
This paper presents a uniformly convergent cubic spline numerical method for a singularly perturbed two-perturbation parameter ordinary differential equation.
Hassan J. Al Salman, Fasika Wondimu Gelu, Ahmed A. Al Ghafli   +2 more
doaj   +1 more source

Turbulent boundary layers with secondary flow [PDF]

An experimental analysis of the boundary layer on a plane wall, along which the flow occurs, whose potential flow lines are curved in plane parallel to the wall is discussed. According to the equation frequently applied to boundary layers in a plane flow,
Grushwitz, E.
core   +1 more source