scholarly journals Acoustic insertion loss due to two dimensional periodic arrays of circular cylinders parallel to a nearby surface

2011 ◽  
Vol 130 (6) ◽  
pp. 3736-3745 ◽  
Author(s):  
Anton Krynkin ◽  
Olga Umnova ◽  
Juan Vicente Sánchez-Pérez ◽  
Alvin Yung Boon Chong ◽  
Shahram Taherzadeh ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Circular Cylinders ◽  
Two Dimensional ◽  
Periodic Arrays

Review of Three Dimensional Dynamic Analyses of Circular Cylinders and Cylindrical Shells

1994 ◽  
Vol 47 (10) ◽  
pp. 501-516 ◽  
Author(s):  
Kostas P. Soldatos
Keyword(s):  
Cylindrical Shells ◽  
Three Dimensional ◽  
Circular Cylinders ◽  
Accurate Information ◽  
Two Dimensional ◽  
Governing Equations ◽  
Complicated Form ◽  
Dynamic Analyses ◽  
Cylindrical Panels ◽  
Elastic Cylinders

There is an increasing usefulness of exact three-dimensional analyses of elastic cylinders and cylindrical shells in composite materials applications. Such analyses are considered as benchmarks for the range of applicability of corresponding studies based on two-dimensional and/or finite element modeling. Moreover, they provide valuable, accurate information in cases that corresponding predictions based on that later kind of approximate modeling is not satisfactory. Due to the complicated form of the governing equations of elasticity, such three-dimensional analyses are comparatively rare in the literature. There is therefore a need for further developments in that area. A survey of the literature dealing with three-dimensional dynamic analyses of cylinders and open cylindrical panels will serve towards such developments. This paper presents such a survey within the framework of linear elasticity.

scholarly journals Numerical Analysis of Fluid Flow on Wall Cylinder Circular with K-ε Modeling for a High Reynolds Rate

2019 ◽  
Vol 1 (3) ◽  
pp. 43-50
Author(s):  
M. Yasep Setiawan ◽  
Wawan Purwanto ◽  
Wanda Afnison ◽  
Nuzul Hidayat
Keyword(s):  
Fluid Flow ◽  
Numerical Study ◽  
General Procedure ◽  
Circular Cylinders ◽  
Cylinder Wall ◽  
Two Dimensional ◽  
Third Order ◽  
Physical Information ◽  
Flow Through ◽  
High Reynolds

This study discusses the numerical study of two-dimensional analysis of flow through circular cylinders. The original physical information entered in the equation governing most of the modeling is transferred into a numerical solution. Fluid flow on two-dimensional circular cylinder wall using high Reynolds k-ε modeling (Re = 106), Here we will do 3 modeling first oder upwind, second order upwind and third order MUSCL by using k-ε standard.  The general procedure for this research is formulated in detail for allocations in the dynamic analysis of fluid computing. The results of this study suggest that MUSCL's third order modeling gives more accurate results better than other models.

Comparison of two-dimensional periodic arrays of convex and concave nanostructures for efficient SERS templates

2010 ◽  
Vol 103 (1) ◽  
pp. 225-231 ◽  
Author(s):  
Akira Zenidaka ◽  
Yuto Tanaka ◽  
Tomoya Miyanishi ◽  
Mitsuhiro Terakawa ◽  
Minoru Obara
Keyword(s):  
Two Dimensional ◽  
Periodic Arrays

Diffraction by one-dimensional or two-dimensional periodic arrays of conducting plates

1991 ◽  
Author(s):  
Roger Petit ◽  
G. Bouchitte ◽  
Gerard Tayeb ◽  
F. Zolla
Keyword(s):  
Two Dimensional ◽  
One Dimensional ◽  
Periodic Arrays

scholarly journals LIGHT SCATTERING FROM TWO-DIMENSIONAL PERIODIC ARRAYS OF NOBLE-METAL DISKS AND COMPLEMENTARY CIRCULAR APERTURES

2015 ◽  
Vol 43 ◽  
pp. 119-133 ◽  
Author(s):  
Xiaowei Ji ◽  
Daiki Sakomura ◽  
Akira Matsushima ◽  
Taikei Suyama
Keyword(s):  
Light Scattering ◽  
Noble Metal ◽  
Two Dimensional ◽  
Periodic Arrays

scholarly journals Metric for attractor overlap

2019 ◽  
Vol 874 ◽  
pp. 720-755 ◽  
Author(s):  
Rishabh Ishar ◽  
Eurika Kaiser ◽  
Marek Morzyński ◽  
Daniel Fernex ◽  
Richard Semaan ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Three Dimensional ◽  
Particle Image Velocimetry Data ◽  
Open Loop ◽  
Operating Conditions ◽  
Wall Turbulence ◽  
Circular Cylinders ◽  
Two Dimensional ◽  
Starting Point

We present the first general metric for attractor overlap (MAO) facilitating an unsupervised comparison of flow data sets. The starting point is two or more attractors, i.e. ensembles of states representing different operating conditions. The proposed metric generalizes the standard Hilbert-space distance between two snapshot-to-snapshot ensembles of two attractors. A reduced-order analysis for big data and many attractors is enabled by coarse graining the snapshots into representative clusters with corresponding centroids and population probabilities. For a large number of attractors, MAO is augmented by proximity maps for the snapshots, the centroids and the attractors, giving scientifically interpretable visual access to the closeness of the states. The coherent structures belonging to the overlap and disjoint states between these attractors are distilled by a few representative centroids. We employ MAO for two quite different actuated flow configurations: a two-dimensional wake with vortices in a narrow frequency range and three-dimensional wall turbulence with a broadband spectrum. In the first application, seven control laws are applied to the fluidic pinball, i.e. the two-dimensional flow around three circular cylinders whose centres form an equilateral triangle pointing in the upstream direction. These seven operating conditions comprise unforced shedding, boat tailing, base bleed, high- and low-frequency forcing as well as two opposing Magnus effects. In the second example, MAO is applied to three-dimensional simulation data from an open-loop drag reduction study of a turbulent boundary layer. The actuation mechanisms of 38 spanwise travelling transversal surface waves are investigated. MAO compares and classifies these actuated flows in agreement with physical intuition. For instance, the first feature coordinate of the attractor proximity map correlates with drag for the fluidic pinball and for the turbulent boundary layer. MAO has a large spectrum of potential applications ranging from a quantitative comparison between numerical simulations and experimental particle-image velocimetry data to the analysis of simulations representing a myriad of different operating conditions.

FMR Investigations of Two-dimensional Periodic Arrays of Disc-shaped Co Particles at Different Temperatures

2015 ◽  
Vol 28 (12) ◽  
pp. 3587-3591 ◽  
Author(s):  
Oleg N. Martyanov ◽  
Dmitriy A. Balaev ◽  
Oleksandr V. Pylypenko ◽  
Larisa V. Odnodvorets ◽  
Sergey V. Chernov ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Periodic Arrays ◽  
Different Temperatures
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