scholarly journals A numerical study on flapping dynamics of a flexible two-layered plate in a uniform flow

2021 ◽  
Vol 33 (1) ◽  
pp. 017108
Author(s):  
Aditya Karthik Saravanakumar ◽  
K. Supradeepan ◽  
P. S. Gurugubelli
Keyword(s):  
Numerical Study ◽  
Uniform Flow ◽  
Layered Plate

The Numerical Study of Propeller Efficiency in Non-Uniform Flow

2011 ◽  
Author(s):  
Oana Marcu ◽  
Adrian Lungu ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
Ch. Tsitouras ◽  
...  
Keyword(s):  
Numerical Study ◽  
Uniform Flow

Some New Results for the Study of Acoustic Radiation within a Uniform Subsonic Flow Using Boundary Integral Method

2012 ◽  
Vol 488-489 ◽  
pp. 383-395 ◽  
Author(s):  
M. Beldi ◽  
A. Maghrebi
Keyword(s):  
Green Function ◽  
Integral Representation ◽  
Singular Integrals ◽  
Subsonic Flow ◽  
Acoustic Radiation ◽  
Numerical Study ◽  
Integral Formula ◽  
Uniform Flow ◽  
Boundary Integral ◽  
Boundary Integral Method

In this paper, a reformulation of the Helmholtz integral equation for tridimesional acoustic radiation in a uniform subsonic flow is presented. An extension of the Sommerfeld radiation condition, for a free space in a uniform movement, makes possible the determination of the convected Green function, the elementary solution of the convected Helmholtz equation. The gradients of this convected Green function are, so, analyzed. Using these results, an integral representation for the acoustic pressure is established. This representation has the advantage of expressing itself in terms of new surface operators, which simplify the numerical study. For the case of a regular surface, the evaluation of the free term associated with the singular integrals shows that it is independent of the Mach number of the uniform flow. A physical interpretation of this result is offered. A numerical approximation method of the integral representation is developed. Furthermore, for a given mesh, an acoustic discretization criterion in a uniform flow is proposed. Finally, numerical examples are provided in order to validate the integral formula.

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