Results 101 to 110 of about 1,039,133 (294)

部分予混合雰囲気中における可燃性固体上の火炎の燃え拡がり解析 [PDF]

, 2008
In this study, we numerically investigated downward flame spread over a thin solid fuel in partially premixed atmospheres. For simplicity, we assumed that the pyrolysis gas consists of methane and nitrogen. To consider the partially premixed atmospheres,
緒方, 佳典, 山本, 和弘, YAMASHITA, Hiroshi, 山下, 博史, OGATA, Yoshinori, YAMAMOTO, Kazuhiro   +5 more
core  

Moisture‐Adaptive Triboelectric Materials and Platforms: Design Strategies, Performance Enhancement, and Applications in Energy Harvesting and Wearable Electronics

Advanced Materials Technologies, EarlyView.
This review summarizes moisture‐adaptive strategies that enable triboelectric nanogenerators (TENGs) to operate across diverse moisture conditions. It examines moisture‐management methods, including exclusion, directional transport, removal, and utilization, with charge‐regulation approaches based on interfacial, dielectric, and structural engineering.
Junzhe Gan, Zhao Sha, Xuehua Zhang, Hoang‐Phuong Phan, Jin Zhang   +4 more
wiley   +1 more source

Fire scale modeling and effects of buoyant flow on laminar upward flame spread

Applications in Energy and Combustion Science
Over the last few decades, efforts to improve fire safety have emphasized understanding material flammability through small-scale laboratory testing due to safety and cost constraints.
Nicharee Thinnakornsutibutr, Arianna Su, Ankit Sharma, Ya-Ting Liao   +3 more
doaj   +1 more source

Two different approaches for creating a prescribed opposed-flow velocity field for flame spread experiments

EPJ Web of Conferences, 2015
Opposed-flow flame spread over solid fuels is a fundamental area of research in fire science. Typically combustion wind tunnels are used to generate the opposing flow of oxidizer against which a laminar flame spread occurs along the fuel samples.
Carmignani Luca, Celniker Greg, Bussett Kyle, Paolini Christopher, Bhattacharjee Subrata   +4 more
doaj   +1 more source

密度変化を考慮したモデルによる部分予混合雰囲気中の火炎の燃え拡がり解析 [PDF]

, 2007
In this study, we have numerically investigated flame spread over solid fuel in partially premixed atmospheres, which may occur under poorly ventilated conditions, forming the combustible mixtures of oxygen and fuel vapors.
緒方, 佳典, 山本, 和弘, YAMASHITA, Hiroshi, 山下, 博史, OGATA, Yoshinori, YAMAMOTO, Kazuhiro   +5 more
core  

Programming Actuation in 3D‐Printed Micro‐Architectures via Interfacial Adhesion Control

Advanced Materials Technologies, EarlyView.
A two‐phase meniscus‐guided 3D printing method directly fabricates microscale poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and poly(vinyl alcohol) (PVA) bilayers with in situ programmable interfaces. Modulating the meniscus stretching speed switches the interface between separated and bonded states, which controls the mechanical ...
Xiao Huan, Juhyung Kim, Yujin Park, Shiqi Hu, Jihyuk Yang, Nan Huang, Feipeng Chen, Yu Liu, Sixi Cao, Zhuoran Wang, Ho Cheung Shum, Barbara Pui Chan, Dongwoon Shin, Ji Tae Kim   +13 more
wiley   +1 more source

Effect of Initial Temperature on Flame Spread over a Sand Bed Wetted with Transformer Oil

Fire
A series of experiments were conducted on quartz sand beds wetted with transformer oil under initial temperatures of 80–140 °C and fuel–sand mass ratios of 1:4–1:8. The flame spreading process over the fine sand bed wetted with limited liquid fuel can be
Jiaqing Zhang, Yubiao Huang, Yi Guo, Guocheng Ding   +3 more
doaj   +1 more source

Effect of Gas Phase Heat Sink on Suppression of Opposed Flow Flame Spread over Thin Solid Fuels in Microgravity Environment

Journal of Combustion, 2012
A two-dimensional numerical model of opposed flow flame spread over thin solid fuel is formulated and modeled to study the effect of gas phase heat sink (a wire mesh placed parallel to the fuel surface) on the flame-spread rate and flame extinction.
Vinayak Malhotra, Chenthil Kumar, Amit Kumar   +2 more
doaj   +1 more source

In Situ Photopolymerization of Smectic B Liquid‐Crystalline Electrolytes from Mesogenic Phosphate–Diacrylate/Ionic Liquid Complexes for High‐Performance Soft Ionic Actuators

Advanced Robotics Research, EarlyView.
A flexible liquid‐crystalline electrolyte membrane via in situ photopolymerization of a phosphate‐functionalized mesogen, ionic liquid, and diacrylate monomer is developed. The resulting smectic B (SmB)‐phase structure enables 2D ion transport with high conductivity (10−4 S cm−1).
Chengyang Liu, Masafumi Yoshio
wiley   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source