Journal ArticleDOI
Passive and active control of near-wall turbulence
TLDR
In this article, a numerical simulation of low Reynolds number turbulent flow over streamwise aligned micro-grooved striations or riblets and the application of a near-wall viscous model to the flow over more complicated riblet shapes (V and U groove, thin element, compound and spanwise non-continuous V-groove) are assessed.About:
This article is published in Progress in Aerospace Sciences.The article was published on 1998-04-14. It has received 28 citations till now. The article focuses on the topics: K-epsilon turbulence model & Turbulence.read more
Citations
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Journal ArticleDOI
Aircraft viscous drag reduction using riblets
TL;DR: In this paper, the performance of 3 M riblets on airfoils, wings and wing-body or aircraft configurations at different speed regimes are reviewed; these applications bring in additional effects like pressure gradients and three dimensionality.
Journal ArticleDOI
Going against the flow—A review of non-additive means of drag reduction
TL;DR: In this article, the performance of five alternative methods that do not involve polymer additives: riblets, dimples, oscillating walls, compliant surfaces, and microbubbles.
Journal ArticleDOI
Fluid flow analysis of a shark-inspired microstructure
Samuel Martin,Bharat Bhushan +1 more
TL;DR: In this paper, the effect of riblet geometry and flow properties on drag, vortices and turbulence fluctuations was explored and a relevant mechanism of drag reduction was discussed to relate riblets parameters and their flow properties to drag change and vortex size.
Journal ArticleDOI
Bio‐Inspired Passive Drag Reduction Techniques: A Review
TL;DR: A review of the mechanism of drag reduction with riblets, the different geometries and types, and the latest developments in drag reduction riblet technology can be found in this article.
Journal ArticleDOI
Flow over an obstacle emerging from the wall of a channel
Henry A. Carlson,John L. Lumley +1 more
TL;DR: In this article, a CTIVE control in the turbulent boundary layer of a wallbounded flow is presented, where three obstacle shapes are analyzed: one is streamwise symmetric, and two are skew symmetric.
References
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A dynamic subgrid‐scale eddy viscosity model
TL;DR: In this article, a new eddy viscosity model is presented which alleviates many of the drawbacks of the existing subgrid-scale stress models, such as the inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes.
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Turbulence statistics in fully developed channel flow at low reynolds number
TL;DR: In this article, a direct numerical simulation of a turbulent channel flow is performed, where the unsteady Navier-Stokes equations are solved numerically at a Reynolds number of 3300, based on the mean centerline velocity and channel half-width, with about 4 million grid points.
Book
Spectral Methods in Fluid Dynamics
M. Y. Hussaini,Thomas A. Zang +1 more
TL;DR: Spectral methods have been widely used in simulation of stability, transition, and turbulence as discussed by the authors, and their applications to both compressible and incompressible flows, to viscous as well as inviscid flows, and also to chemically reacting flows are surveyed.
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The structure of turbulent boundary layers
TL;DR: In this article, the authors describe the formation of low-speed streaks in the region very near the wall, which interact with the outer portions of the flow through a process of gradual lift-up, then sudden oscillation, bursting, and ejection.
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The dynamics of coherent structures in the wall region of a turbulent boundary layer.
TL;DR: In this article, the wall region of a turbulent boundary layer is modelled by expanding the instantaneous field in so-called empirical eigenfunctions, as permitted by the proper orthogonal decomposition theorem.