Results 101 to 110 of about 404,456 (371)

Implementation of latching control in a numerical wave tank with regular waves [PDF]

Journal of Ocean Engineering and Marine Energy, 2016
In order to increase the overall power production efficiency of wave energy technology in the face of sea state variability, the presence of the control is mandatory. A model of the system is required to tune the controller parameters and predict the resulting performances. Even though the relevance of nonlinearities is magnified by the presence of the
Giorgi, Giuseppe, Ringwood, John V.
openaire   +3 more sources

Intelligent Operator‐Independent Flexibility in Robotic Non‐Destructive Evaluation

Advanced Intelligent Systems, EarlyView.
Non‐destructive evaluation of high‐value components remains a manufacturing bottleneck due to rigid robotic calibration and fixturing. This study presents a flexible, adaptable system integrating 3D vision and force‐position control with a collaborative KUKA LBR robot. The geometry‐agnostic system enables pose‐independent ultrasonic inspection, detects
Amine Hifi, Randika K. W. Vithanage, Shaun McKnight, Vedran Tunukovic, Ewan Nicolson, Rylan Gomes, Alastair Poole, Ehsan Mohseni, Stephen Gareth Pierce, Charles MacLoed, Tom O’Hare, Gavin Munro   +11 more
wiley   +1 more source

Numerical Comparison of Piston-, Flap-, and Double-Flap-Type Wave Makers in a Numerical Wave Tank

Journal of Marine Science and Engineering
In naval and ocean engineering, accurate simulation of incident waves is essential for predicting the motion response of offshore structures. Traditional wave generation methods, such as piston- and flap-type wave makers, often face challenges in ...
Kaicheng Yan, Haoyu Dou, Jungkeun Oh, Daewon Seo   +3 more
doaj   +1 more source

Electrohydrodynamic Fiber Pump With Dual‐Flow Channels

Advanced Intelligent Systems, EarlyView.
A dual‐channel electrohydrodynamic (EHD) fiber pump is introduced, which enables fluid flow inside and outside fully exposed helical electrodes. The dual‐channel design significantly enhances flow rate, pressure, and efficiency compared with the conventional design.
Yuya Shibahara, Rudrajyoti Das, Naoki Ogawa, Hideko Akai, Jun Shintake   +4 more
wiley   +1 more source

Experimental-numerical analysis of added resistance to container ships under presence of wind-wave loads.

PLoS ONE, 2019
Experimental and numerical analyses performed on a scaled-down model of a 1900TEU container-ship are reported herein. Wind-tunnel and towing-tank experiments along with computational-fluid-dynamic simulations were performed to obtain (1) wind-load ...
Wei Wang, Tiecheng Wu, Dagang Zhao, Chunyu Guo, Wanzhen Luo, Yongjie Pang   +5 more
doaj   +1 more source

Higher-order Spectral Method for Regular and Irregular Wave Simulations

한국해양공학회지, 2020
In this study, a nonlinear wave simulation code is developed using a higher-order spectral (HOS) method. The HOS method is very efficient because it can determine the solution of the boundary value problem using fast Fourier transform (FFT) without ...
Seunghoon Oh, Jae-Hwan Jung, Seok-Kyu Cho   +2 more
doaj   +1 more source

Internal wave pressure, velocity, and energy flux from density perturbations

, 2016
Determination of energy transport is crucial for understanding the energy budget and fluid circulation in density varying fluids such as the ocean and the atmosphere.
Allshouse, Michael R., Lee, Frank M., Morrison, Philip J., Swinney, Harry L.   +3 more
core   +1 more source

Liquid Jetting‐Based Miniature Robotic Navigation in Confined Fluidic Spaces

Advanced Intelligent Systems, EarlyView.
We introduce a new class of liquid‐jetting‐based miniature robots (JetBots) ranging in size from mm‐to‐cm, featuring a unified approach in design, fabrication, and actuation. They demonstrate fast locomotion (30.3 cm/s), rapid steering (648.8°/s), and diverse functions, such as puncturing soft materials and unlimited cargo sampling and delivery, paving
Debasish Roy, Tianlu Wang
wiley   +1 more source

Steps Towards a Self Calibrating, Low Reflection Numerical Wave Maker Using Narx Neural Networks [PDF]

, 2017
Numerical wave-makers are important for accurate simulations of marine two-phase flows. One important aspect of the suitability is the ability to recreate a given surface elevation time trace at a given location in the tank ...
Schmitt, Pal
core  

Influence of Wall Deformation Structure on the Liquid Film Flow Behavior Under Turbulent Conditions

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To explore the influence of typical wall deformation structure in the scrubbing‐cooling tube on the liquid film, this paper studied the liquid film flow behavior on the riblet walls with representative riblet radii and compared them with the flat wall. Under different liquid film Reynolds numbers (Rel = 8.3 × 103 ~ 3.14 × 104), the liquid film
Qian Liu, Yifei Wang, Jie Zeng, Zongren Pan, Dawei Feng, Guangsuo Yu   +5 more
wiley   +1 more source