Results 81 to 90 of about 1,940 (222)

Microcylinder and Slot Combination for Flow Separation Control Over a Wind Turbine Airfoil

open access: yesWind Energy, Volume 28, Issue 7, July 2025.
ABSTRACT This study explores a novel passive flow control strategy combining a microcylinder and slot configuration to mitigate flow separation over an S809 wind turbine airfoil under stall conditions at a Reynolds number of 106. Numerical simulations are conducted using the Reynolds‐averaged Navier–Stokes (RANS) approach. The primary objectives are to
Sami Bouterra   +3 more
wiley   +1 more source

Emerging Trends in Bioinspired Superhydrophobic and Superoleophobic Sustainable Surfaces

open access: yesAdvanced Materials, Volume 37, Issue 12, March 26, 2025.
Biomimicry offers an exceptional opportunity to design materials with advanced properties. This review summarizes the latest findings for developing sustainable superhydrophobic–superoleophobic materials using biomimicry, their challenges, and future directions.
Cerys M. Cormican   +3 more
wiley   +1 more source

The impact of the shark skin-inspired riblet concept application on the aircraft wing surface on aerodynamic performance

open access: yesInternational Journal of Aeronautics and Astronautics
A comprehensive review of sharkskin-inspired surfaces and riblet structures (also known as denticles) is conducted which is motivated by the desire to enhance aerodynamic efficiency and sustainability in modern aviation. Inspired by natural sea creatures
Erdogan Kaygan, Reem Aly
doaj   +1 more source

Organic Electrochemical Transistors: From Lithography to Large‐Scale Printing

open access: yesAdvanced Electronic Materials, Volume 11, Issue 3, March 2025.
This review provides an insightful overview on recent progress of organic electrochemical transistors (OECTs) fabricated via diversified printing techniques. Material systems, printing technologies, and application fields are comprehensively summarized, following with brief discussion on the remaining challenges and future prospects for large‐scale ...
Ling Huang   +7 more
wiley   +1 more source

Additive Manufacturing of Organic Electrochemical Transistors: Methods, Device Architectures, and Emerging Applications

open access: yesSmall, Volume 21, Issue 11, March 19, 2025.
Organic electrochemical transistors (OECTs) are essential for bioelectronics, neuromorphics, and flexible electronics. This review examines additive manufacturing advances for OECTs, covering printing techniques, device architectures, and applications including biochemical sensing, neuromorphic, green bio‐electronics, self‐healable, and 4D electronics.
Roberto Granelli   +2 more
wiley   +1 more source

Sheave of Vail Riblet #6

open access: yes, 2022
Date scanned: 2004-06-23.Held in the Russell L.
Dwyer, Charles F.
core  

Experimental Study on the Friction Drag Reduction of Superhydrophobic Surfaces in Closed Channel Flow

open access: yesJournal of Applied Fluid Mechanics, 2019
Due to the importance of copper and its alloys in marine applications, the main objective of this research is to provide a simple, effective and low cost manufacturing approach to fabricate a superhydrophobic riblet copper surface with high drag ...
M. Monfared   +2 more
doaj  

Surrogate Modeling for Active Drag Reduction in Turbulent Boundary Layer Flows Using Multitask Gaussian Process Regression

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 24, Issue 4, December 2024.
ABSTRACT Single‐ and multitask Gaussian process regression (GPR), termed sGPR and mGPR, are investigated as surrogate models to guide the design of actuation parameters for active drag reduction techniques in turbulent boundary layer (TBL) flows.
Fabian Hübenthal   +2 more
wiley   +1 more source

Riblet Research

open access: yes, 1985
Research at Langley on skin friction drag was described in Tech Briefs. 3M engineers suggested to Langley that grooves molded into a lightweight plastic film with adhesive backing and pressed on an airplane would be simpler than cutting grooves directly ...

core  

Experimental characterisation of Kelvin-Helmholtz rollers over riblet surfaces

open access: yes
The formation of Kelvin–Helmholtz-like rollers (referred to as K–H rollers) over riblet surfaces has been linked to the drag-increasing behaviour seen in certain riblet geometries, such as sawtooth and blade riblets, when the riblet size reaches ...
Kozul, M   +6 more
core   +1 more source

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