COMPARISON OF WAVE TRANSMISSION CHARACTERISTICS OF SUBMERGED BREAKWATER COMPOSED OF TWO DIFFERENT TYPES OF ARMOR BLOCKS

2009 ◽  
Author(s):  
DAL SOO LEE ◽  
SANG-HO OH ◽  
YI-DONG PARK
Keyword(s):  
Wave Transmission ◽  
Transmission Characteristics ◽  
Submerged Breakwater ◽  
Different Types

scholarly journals Numerical investigation on the characteristics of water transfer in PEMFC with bionic flow channel

2019 ◽  
Vol 83 ◽  
pp. 01005
Author(s):  
Tao Chen ◽  
Shihua Liu ◽  
Li Yang
Keyword(s):  
Water Transport ◽  
Polymer Electrolyte Membrane ◽  
Flow Channel ◽  
Water Drainage ◽  
Transmission Characteristics ◽  
Electrolyte Membrane ◽  
Numerical Studies ◽  
Flow Channels ◽  
Significant Difference ◽  
Different Types

The content and the transmission characteristics of the water in the polymer electrolyte membrane fuel cell (PEMFC) have a significant influence on its performance. So far, there are few separate numerical studies on the process of water transport in the bionic flow channel, and the performance of bionic flow channel is different from conventional flow channel in part owing to the differences of their water drainage. Therefore, in order to understand the water drainage process of bionic flow channel, two different types of bionic flow channels are adopted in this paper. The method of numerical simulation is used to study the transmission process of liquid water in the bionic flow channel of different placement orientations. The simulation results found that the orientations of bionic flow channel has an influence on the process of water transport in the flow channel, and the process of water drainage also has a significant difference in the two different types of bionic flow channel.

scholarly journals Waveguide Structures with Improved Cut-off Frequency and Bandwidth

2019 ◽  
Vol 9 (2S3) ◽  
pp. 82-85
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wave Transmission ◽  
The Finite Element Method ◽  
Transmission Characteristics ◽  
Ridge Waveguides ◽  
Ridge Structures ◽  
Double Ridge ◽  
Better Than ◽  
Element Method

The wave transmission characteristics of rectangular, double-ridge, trapezoidal-ridge and anti-trapezoidal ridge waveguides are analyzed using the finite-element method. The cut-off wavelength and attenuation of these waveguides are calculated. The result shows that anti-trapezoidal ridge waveguides perform better than rectangular, double-ridge and trapezoidal-ridge waveguides. The variation of bandwidth and attenuation with respect to change in the angle of physical ridge structures has been studied while migrating from rectangular to anti-trapezoidal ridge structures.

scholarly journals Analysis of one-dimensional electromagnetic wave transmission characteristics of plasma based on a kinetic theory model

2014 ◽  
Vol 63 (21) ◽  
pp. 214101
Author(s):  
Chen Wen-Bo ◽  
Gong Xue-Yu ◽  
Lu Xing-Qiang ◽  
Feng Jun ◽  
Liao Xiang-Bai ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Kinetic Theory ◽  
Theory Model ◽  
Wave Transmission ◽  
Transmission Characteristics ◽  
One Dimensional
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