Journal ArticleDOI
Drag reduction of turbulent flow over thin rectangular riblets
TLDR
In this article, a second-order accurate finite volume code is modified in order to reconstruct the adjacent cells to the riblets at Cartesian coordinates, and a quadratic interpolation scheme is used to estimate the fluxes at the reformed cells.About:
This article is published in International Journal of Engineering Science.The article was published on 2007-02-01. It has received 88 citations till now. The article focuses on the topics: Parasitic drag & Drag coefficient.read more
Citations
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Journal ArticleDOI
Drag reduction by riblets
TL;DR: In this article, the interaction of the overlying turbulent flow with riblets, and its impact on their drag reduction properties are analyzed, and it is found that the groove cross section A + is a better characterization of this breakdown than the riblet spacing, with an optimum A + 1/2 ≈ 11.
Journal ArticleDOI
Hydrodynamic stability and breakdown of the viscous regime over riblets
TL;DR: In this paper, the interaction of the overlying turbulent flow with a riblet surface and its impact on drag reduction is analysed, and the optimal rib size is collapsed best by the square root of the groove cross-section, lg+=Ag+1/2.
Journal ArticleDOI
Marine drag reduction of shark skin inspired riblet surfaces
TL;DR: In this paper, different marine drag reduction technologies are discussed, and a review of riblet performance studies is also given, and an experiment is given to discuss the impact of area.
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Modeling and optimization of shark-inspired riblet geometries for low drag applications.
Samuel Martin,Bharat Bhushan +1 more
TL;DR: To optimize riblet geometries for low drag, a shark-inspired geometry with riblets arranged in a scale pattern was modeled and their drag properties and vortex structures were compared.
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.
References
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Journal ArticleDOI
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.
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The immersed boundary method
TL;DR: This paper is concerned with the mathematical structure of the immersed boundary (IB) method, which is intended for the computer simulation of fluid–structure interaction, especially in biological fluid dynamics.
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Modeling a no-slip flow boundary with an external force field
TL;DR: In this paper, the Navier-Stokes equations permit the presence of an externally imposed body force that may vary in space and time, and the velocity is used to iteratively determine the desired value.
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The minimal flow unit in near-wall turbulence
Javier Jiménez,Parviz Moin +1 more
TL;DR: In this article, the authors performed direct numerical simulations of unsteady channel flow at low to moderate Reynolds numbers on computational boxes chosen small enough so that the flow consists of a doubly periodic array of identical structures.
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Fully Conservative Higher Order Finite Difference Schemes for Incompressible Flow
TL;DR: In this paper, the conservation properties of the mass, momentum, and kinetic energy equations for incompressible flow are specified as analytical requirements for a proper set of discrete equations, and finite difference schemes for regular and staggered grid systems are checked for violations of the conservation requirements and a few important discrepancies are pointed out.