Results 61 to 70 of about 208,538 (280)
Zhongguo Jianchuan YanjiuObjective In order to improve the actual efficiency of microbubble drag reduction technology, this study develops intelligent airflow control technology for microbubble drag reduction based on an improved ant colony optimization (ACO) algorithm ...
Tianchen LI +3 more
doaj +1 more source
A Method for Reducing the Drag of the Ship Shaped Wall by Using Piezoelectric Ceramic Vibrators
IEEE Access, 2019 High-frequency and micro-amplitude vibration applied on ship walls in the fluid can interfere with the coherent structure of the boundary layer near the wall to achieve drag reduction.
Lu Zhang +3 more
doaj +1 more source
Results in EngineeringThis paper uses the Large-eddy simulation method to investigate the influence of riblet yaw angle on drag reduction rate with different immersion heights, revealing that the vortex structure is gradually transformed from riblet-tip vortex pairs to boundary vortex forms with the increase of yaw angle, and analyzing the influence mechanism of immersion ...
Zhiping Li +4 more
openaire +2 more sources
Reynolds-dependence of turbulent skin-friction drag reduction induced by spanwise forcing [PDF]
, 2016 This paper examines how increasing the value of the Reynolds number $Re$ affects the ability of spanwise-forcing techniques to yield turbulent skin-friction drag reduction.
Gatti, Davide, Quadrio, Maurizio
core +2 more sources
Advanced Functional Materials, EarlyView.MagPiezo enables wireless activation of endogenous Piezo1 channels without genetic modification using 19 nm magnetic nanoparticles and low‐intensity magnetic fields. It generates torque forces at the piconewton scale to trigger mechanotransduction in endothelial cells, standing as a novel platform to interrogate and manipulate Piezo1 activity in vitro.
Susel Del Sol‐Fernández +7 more
wiley +1 more source
Advanced Functional Materials, EarlyView.This review evaluates strategies for electrochemical CO2 reduction to ethylene, focusing on copper‐based catalyst design and microenvironment modulation to achieve industrial‐grade performance. By leveraging operando synchrotron‐based characterizations, we provide a multiscale understanding of dynamic structural transformations and key reaction ...
Meng Zhang, Zuolong Chen, Yimin A. Wu
wiley +1 more source
Multiscale structure of turbulent channel flow and polymer, dynamics in viscoelastic turbulence [PDF]
, 2010 This thesis focuses on two important issues in turbulence theory of wall-bounded flows. One is the recent debate on the form of the mean velocity profile (is it a log-law or a power-law with very weak power exponent?) and on its scalings with Reynolds
Dallas, Vassilios, Dallas, Vassilios
core +1 more source
Advanced Functional Materials, EarlyView.Reprogrammable multi‐material smart textiles knitted from liquid crystal elastomer fibers undergo 2D and 3D deformation under thermal and photo stimuli. Circularly knitted tubular structures reversibly contract in radial and axial directions, enabling autonomous climbing, liquid release, and micro pumping.
Xue Wan +8 more
wiley +1 more source
Aerodynamic Characteristics of High-speed Train Pantographs Based on Jet Flow Control [PDF]
Journal of Applied Fluid MechanicsThe pantograph is a critical instrument that significantly affects the aerodynamics of high-speed trains, posing a considerable challenge to the energy conservation and environmental protection of trains.
S. Huang +5 more
doaj +1 more source
Water Research XDrinking water distribution systems (DWDS) experience significant energy losses due to turbulence-induced drag. While shark-inspired riblet surfaces have been shown to reduce drag in controlled conditions, their effectiveness in DWDS remains uncertain, particularly under the dynamic flow variations.
Mirvahid Mohammadpour Chehrghani +4 more
openaire +1 more source