Experimental study of optical hyperbolic metamaterials for high-efficiency spatial filtering

2020 ◽  
Vol 45 (17) ◽  
pp. 4923
Author(s):  
Na Yao ◽  
Jiao Jiao ◽  
Zhenfei Luo ◽  
Du Wang ◽  
Ke Cheng ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Efficiency ◽  
Spatial Filtering ◽  
Hyperbolic Metamaterials

scholarly journals Effect of Ballistic Electrons on the Optical Response of Hyperbolic Metamaterials

2019 ◽  
Vol 8 (5) ◽  
pp. 23-28
Author(s):  
G. M. Marega ◽  
E. Marega ◽  
B.-H. V. Borges ◽  
A. F. Da Mota
Keyword(s):  
Experimental Study ◽  
Optical Transmission ◽  
Ballistic Transport ◽  
Optical Response ◽  
Analytic Approximation ◽  
Metal Insulator ◽  
Hyperbolic Metamaterials ◽  
Hyperbolic Metamaterial ◽  
Simulated Model ◽  
Metal Insulator Metal

This paper presents a theoretical and experimental study of the effect of ballistic electrons on the optical response of MIM (Metal-Insulator-Metal) like hyperbolic metamaterial structures. The simulated model using standard parameters and the experimental optical transmission show a 20% peak difference due to the presence of ballistic transport in the metal. A semi-analytic approximation based on the Drude's model is used for accurately predicting the optical response of the hyperbolic substrate and plasmon damping in the fabricated metasurfaces.

An Experimental Study of Heat Transfer With an Impinging Circular Water Jet

2003 ◽  
Author(s):  
Hao Leng ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Hongbin Min ◽  
G.-X. Wang
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
High Efficiency ◽  
Impinging Jet ◽  
High Heat ◽  
Water Jet ◽  
Back Surface ◽  
High Tech ◽  
High Heat Flux ◽  
Transfer Coefficients

Impinging jet is widely used in both traditional industrial and new high-tech fields. High efficiency heat transfer in impinging jet cooling makes it an important method for heat transfer enhancement, in particular in cooling of electronic devices with high heat density. This paper presents an experimental study of heat transfer by an impinging circular water jet. A Constantan foil with the size of 5 mm × 5 mm was used to simulate a microelectronic chip with heat generated by passing an electrical current through the foil. A high heat flux over 106 W/m2 was achieved. The surface temperature was measured by a thermocouple glued onto the back surface of the foil. Both a free surface jet and a submerged jet were investigated. Effect of the nozzle-to-surface spacing as well as the jet speed at the exit of the nozzle on cooling was examined. By positioning the jet away from the center of the heating foil surface, the radial variation of the heat transfer coefficients over the foil was also investigated. Quantitative heat transfer data have been obtained and analyzed.

Experimental study of a high-efficiency, low emission porous matrix combustor—heater

Fuel ◽  
1995 ◽  
Vol 74 (11) ◽  
pp. 1641-1647 ◽  
Author(s):  
Tian-Yu Xiong ◽  
Mark J. Khinkis ◽  
Ferol F. Fish
Keyword(s):  
Experimental Study ◽  
High Efficiency ◽  
Porous Matrix ◽  
Low Emission

A numerical and experimental study on a high efficiency cyclone dust separator for high temperature and pressurized environments

2005 ◽  
Vol 25 (11-12) ◽  
pp. 1821-1835 ◽  
Author(s):  
Mi-Soo Shin ◽  
Hey-Suk Kim ◽  
Dong-Soon Jang ◽  
Jin-Do Chung ◽  
Matthias Bohnet
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
High Efficiency ◽  
Dust Separator

Experimental Study in High Efficiency Milling of Hydrogenated Ti6Al4V Alloy

2013 ◽  
Vol 770 ◽  
pp. 179-182
Author(s):  
Shu Bao Yang ◽  
Jiu Hua Xu ◽  
Yu Can Fu ◽  
Guo Hui Zhu
Keyword(s):  
Experimental Study ◽  
Titanium Alloy ◽  
Cutting Force ◽  
Tool Life ◽  
Hydrogen Content ◽  
High Efficiency ◽  
Cutting Speed ◽  
Favorable Effect ◽  
Maximum Magnitude ◽  
Titanium Alloy Ti6al4v

Milling tests were undertaken to analyze and compare the machinability of hydrogenated titanium alloy Ti6Al4V. Uncoated WC-Co tool inserts were used in the study. The feed and the depth of milling were maintained constant, and only the milling speed was varied because it is the most affecting parameter. Results showed that cutting force and tool life were greatly influenced by the contents of hydrogen. Tool life decreased at first and then increased gradually with the increase of hydrogen content, and the maximum magnitude decrease of tool life is about 0.2%H, meanwhile, the maximum tool life is about 0.5%H. However, with the increase of cutting speed, the favorable effect of hydrogen on the titanium alloy machinability would be weakened even disappear, therefore, 50-100m/min would be a suitable choice of cutting speed.

scholarly journals Experimental Study and High-Efficiency Simulation of In-Plane Behavior of Composite Frame Slab

2021 ◽  
Author(s):  
Wen-Hao Pan ◽  
Mu-Xuan Tao ◽  
Chuan-Hao Zhao ◽  
Ran Ding ◽  
Li-Yan Xu
Keyword(s):  
Experimental Study ◽  
Failure Mode ◽  
High Efficiency ◽  
Numerical Study ◽  
Element Model ◽  
Experimental Results ◽  
Loading Test ◽  
Composite Frame ◽  
Out Of Plane ◽  
Load Displacement

Abstract Experimental and numerical studies were conducted to investigate the in-plane behavior of the steel–concrete composite frame slab under cyclic loads. In the experimental study, an in-plane loading test of a typical composite frame slab was designed by constraining its out-of-plane deformations. The test observations, the load–displacement relationship, and the shear and flexural deformation components were discussed to investigate the in-plane load resistant behavior and the failure mechanism of the slab. The experimental results demonstrated an evident shear cracking concentration behavior and a pinching hysteretic curve associated with a typical shear-tension failure mode of the composite frame slab. In the numerical study, a high-efficiency modeling scheme based on the multiple vertical line element model (MVLEM) and the fiber beam–column element was developed for the test specimen. Comparisons with the experimental results showed that the developed model predicted the overall load–displacement relationship, the relationships associated with the shear and flexural deformation components, and the failure mode with a reasonable level of accuracy.

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