Results 81 to 90 of about 25,241,622 (301)

Design and Analysis of Vibration Drag Reduction Tool for Coiled Tubing Drilling

open access: yesShiyou jixie, 2017
The vibration drag reduction tool for coiled tubing drilling is of great significance to the development and application of coiled tubing drilling technology.
Ouyang Saisai   +3 more
doaj  

Oxygen Evolution Reaction Catalysts for Acidic‐Media CO2 Electrolyzers

open access: yesAdvanced Materials, EarlyView.
Acidic‐media CO2 electroreduction (CO2R) could decarbonize chemical production, despite relying on rare‐earth elements for anodic oxygen evolution reaction (OER). Transferring the learnings from mature sister technologies (water electrolysis) could accelerate technological development.
Mingcheng Huang, Adnan Ozden
wiley   +1 more source

Numeric analysis of airflow around the body of the Silesian Greenpower vehicle

open access: yesMATEC Web of Conferences, 2018
Numerical analysis of drag values of an electric race car's body. Silesian Greenpower is a student organization specializing in electric race car design.
Baier Andrzej   +6 more
doaj   +1 more source

Innovation Meets Accessibility in Melt Electrowriting 3D Printer Design: Continuous Process Monitoring and Automation via Modular Software and Hardware

open access: yesAdvanced Materials Technologies, EarlyView.
This manuscript describes the design and validation of an innovative melt electrowriting printer. With a turntable collector and modular software architecture, it unifies previous advanced MEW printer capabilities and enhances adaptability for a wide range of research applications.
Timo Baroth   +3 more
wiley   +1 more source

Numerical Simulation and Analysis of Added Mass for the Underwater Variable Speed Motion of Small Objects

open access: yesJournal of Marine Science and Engineering
Unlike uniform motion, when an object moves underwater with variable speed, it experiences additional resistance from the water, commonly referred to as added mass force.
Xuanquan Wang   +3 more
doaj   +1 more source

Multiscale Acoustic Bubble Actuators Using Bioinspired Liquid‐Repellent Microstructures

open access: yesAdvanced Materials Technologies, EarlyView.
The article presents multiscale acoustic bubble actuators using bioinspired liquid‐repellent microstructures, enabling programmable trapping, pumping, mixing, and precise flow control. Mimicking springtail microstructures, these scalable actuators (200 µm–1 mm) offer multifunctionality in all‐in‐one devices, letter‐shaped arrays, and 3D cube ...
Cem Balda Dayan   +8 more
wiley   +1 more source

CFD analysis of human powered submarine to minimize drag

open access: yes, 2018
This paper deals with finding the optimum fineness ratio, i.e. ratio of length to maximum diameter, of human-powered submarine of different shapes to reduce the drag force on the body using Computational Fluid Dynamics (CFD) analysis.
S. Khan   +4 more
semanticscholar   +1 more source

Analysis of Rudder Span Effects On Ims Hydrodynamic Induced Drag

open access: yesThe International Journal of Small Craft Technology, 2002
The physical draft of keels has long been known to be critical for the upwind performance of sailboats and has long been an element of handicap rules. The IMS rule uses a relatively sophisticated algorithm for assessing keel draft yet, as is the case with other rules, has never included any influence of rudder span.
Teeters, J., Pallard, R., Muselet, C.
openaire   +5 more sources

Anti‐Slip Material‐Based Strategies and Approaches

open access: yesAdvanced Materials Technologies, EarlyView.
This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani   +3 more
wiley   +1 more source

NUMERICAL SIMULATION ANALYSIS AND THE DRAG REDUCTION PERFORMANCE INVESTIGATION ON CIRCULAR CYLINDER WITH DIMPLES AT SUBCRITICAL REYNOLDS NUMBER

open access: yesJixie qiangdu, 2017
In order to study the drag reduction performance of non-smooth circular cylinder,the SST k-ω turbulence model was been used to simulate the flow around a circular cylinder and studied the drag reduction performance of a circular cylinder at the ...
WANG GuoRong   +4 more
doaj  

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