Rotational Vortex Metasurface Arrays Enabling Tunable Perfect Petal‐Shaped Beam Emissions
Sign Up to like & getrecommendations! Published in 2024 at "Advanced Optical Materials"
DOI: 10.1002/adom.202303066
Abstract: Actively tunable petal‐shaped pattern emissions have been successfully demonstrated by the cascade of two innovative rotational vortex metasurface arrays (RVMAs). To ensure accurate cascade, each RVMA comprises a central unit with the capability to converge… read more here.
Keywords: beam emissions; petal shaped; metasurface arrays; vortex metasurface ... See more keywords
Two-phase heat transfer in horizontal dimpled/protruded surface tubes with petal-shaped background patterns
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Heat and Mass Transfer"
DOI: 10.1016/j.ijheatmasstransfer.2019.06.046
Abstract: Abstract Experimental investigations were carried out to measure the average heat transfer coefficient and frictional pressure loss of R410A during condensation and evaporation in five newly-developed dimpled tubes and two smooth tubes. These dimpled tubes… read more here.
Keywords: heat; surface; tube; transfer ... See more keywords
A Fractured Petal-Shaped Multipolarization Reconfigurable Antenna With Over 2:1 Bandwidth for Intelligent IoT Applications
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2025.3605053
Abstract: Wideband polarization reconfigurable antenna (PRA) is highly desired for modern intelligent Internet of Things (IoT) applications that demand both high-data rates and flexible polarizations. To meet this demand, a fractured petal-shaped multi-PRA has been developed.… read more here.
Keywords: petal shaped; fractured petal; antenna; iot applications ... See more keywords
Heat Transfer Enhancement of Double-Tube-Type Heat Exchanger by Petal-Shaped Tube (Study on Optimum Tube Shape)
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Thermal Science and Engineering Applications"
DOI: 10.1115/1.4041347
Abstract: Heat exchangers are used widely in many fields, and various kinds of exchanger have been developed according to the requirement of the practical applications. Recently, heat exchangers that are highly efficient or compact have become… read more here.
Keywords: petal shaped; tube; heat transfer; heat ... See more keywords
Investigation of the Lubrication Performance of Petal-Shaped Micro-Pit Texture on the Surface of Stator Rubber in Screw Pumps
Sign Up to like & getrecommendations! Published in 2025 at "Lubricants"
DOI: 10.3390/lubricants13090379
Abstract: This study proposed a surface modification method, based on petal-shaped micro-pit texture, allowing to solve the problem of significant wear of the stator caused by the oil film rupture in the metal-rubber friction pair of… read more here.
Keywords: micro pit; petal shaped; texture; shaped micro ... See more keywords