Results 31 to 40 of about 75,453 (130)

Effects of non-sinusoidal pitching motion on the propulsion performance of an oscillating foil.

PLoS ONE, 2019
Numerical simulations have been used in this paper to study the propulsion device of a wave glider based on an oscillating hydrofoil, in which the profile of the pitching and heaving motion have been prescribed for the sake of simplicity.
Zhanfeng Qi, Jingsheng Zhai, Guofu Li, Jiazhong Peng   +3 more
doaj   +1 more source

Hydrodynamic Analysis of a Flopping NACA0012 Hydrofoil and Dolphin Fish-Like Model [PDF]

Journal of Applied Fluid Mechanics
Imitating Dolphin fish-like movement is productive method for enhancing their hydrodynamic capabilities. This work aims to analyze and understand the oscillations of tail fluke of Dolphin, which can be used as a propulsive mechanism for underwater fish ...
T. Prabu, A. Firthouse, A. M. Baranitharan   +2 more
doaj   +1 more source

A Model for Performance Estimation of Flapping Foil Operating as Biomimetic Stream Energy Device

Journal of Marine Science and Engineering, 2020
During the recent period intensive research has focused on the advancement of engineering and technology aspects concerning the development and optimization of wave and current energy converters driven by the need to increase the percentage of marine ...
Iro E. Malefaki, Kostas A. Belibassakis
doaj   +1 more source

Formation Control With Obstacle Avoidance of Underwater Swarms Based on Relative Visual Feedback

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater multi‐robot and swarm systems require advanced methodologies for controlling collective behavior. Conventional single‐robot techniques, such as tethering, sonar imaging, and acoustic localization, are not scalable or effective for swarm applications.
Andrea Infanti, Saverio Iacoponi, Saif Alameri, Mohamed El Hanbaly, Mohammed Tarnini, Cesare Stefanini, Giulia De Masi, Federico Renda   +7 more
wiley   +1 more source

Influence of variation in dynamic parameters of the flexible hydrofoil on energy harvesting performance

Applied Ocean Research
The flexible hydrofoil represents a promising tidal energy harvesting device, known for its environmentally friendly attributes. Understanding the intricacies of its energy harvesting mechanism and analyzing the impacts of key parameters are essential ...
Yuzhi Yao, Chaoyong Zong, Jiaming Jia, Jianan Xu   +3 more
doaj   +1 more source

Control of Oscillating Foil for Propulsion of Biorobotic Autonomous Underwater Vehicle (AUV)

Applied Bionics and Biomechanics, 2005
The paper treats the question of control of a laterally and rotationally oscillating hydrofoil for the propulsion of biologically inspired robotic (biorobotic) autonomous underwater vehicles (BAUVs).
S. N. Singh, S. Mani
doaj   +1 more source

Skeletons of swiftly swimming sharks: Three‐dimensional analysis of lamniform vertebral morphology and mineral architecture

Journal of Anatomy, EarlyView.
We examined morphology, 3D arrangement, and mineral amount in cartilaginous vertebrae from four lamniform shark families (Alopiidae, Carchariidae, Cetorhinidae, and Lamnidae). We identified family‐specific mineralization trends, and regional patterning of structures along the column.
Jamie L. Knaub, Madisan Biordi, Emma Pawlik, Michelle Passerotti, Lisa J. Natanson, Tricia Meredith, Marianne Porter   +6 more
wiley   +1 more source

Development of a hydrofoil wake oscillator model based on a near-vortex strength for predicting vortex-induced vibration on a hydrofoil

International Journal of Naval Architecture and Ocean Engineering, 2023
Recently, the evaluation of vortex-induced vibration has emerged as a significantly important issue owing to the development of high-speed and lightweight ships and submarines. To derive an accurate vortex-induced vibration response, it is essential to consider the fluid-structure interaction. Moreover, it is necessary to evaluate the generation of the
Hyun-Gyu Choi, Suk-Yoon Hong, Jee-Hun Song, Won-Seok Jang, Woen-Sug Choi   +4 more
openaire   +2 more sources

From Ship to Shore: A Review of Vessel‐To‐Grid Bidirectional Charging for Sustainable Maritime Transport

EcoEnergy, Volume 4, Issue 4, August 2026.
As maritime transport electrifies, bidirectional charging (V2G) offers a dual‐purpose solution for energy resilience and economic viability. This work identifies key technological advancements and lifecycle challenges utilizing practical case studies to demonstrate how V2G systems can drive decarbonization and grid stability in the marine sector ...
Jonathan Bloor, Tamer Kamel, Sarah Fear, Lee J. Durndell   +3 more
wiley   +1 more source

Large eddy simulation of flow past a stationary and controlled oscillating circular cylinder at RE=5500 [PDF]

, 2013
Vortex shedding from a stationary cylinder and transversely oscillating circular cylinder in a uniform flow at a Reynolds number of 5500 is numerically studied by three-dimensional Large Eddy Simulation (LES). The filtered equations are discretised using
Philip A. Wilson, Kim, Sunghan, Sunghan Kim, Zhi-Min Chen, Wilson, Philip A., Chen, Zhimin   +5 more
core   +2 more sources