A fast exact numerical solution for the acoustic response of concentric cylinders with penetrable interfaces

1990 ◽  
Vol 87 (2) ◽  
pp. 495-502 ◽  
Author(s):  
Gerard T. Schuster
Keyword(s):  
Numerical Solution ◽  
Acoustic Response ◽  
Exact Numerical Solution ◽  
Concentric Cylinders

Exact numerical solution for asymmetric charge transfer

1964 ◽  
Vol 10 (3) ◽  
pp. 284-285
Author(s):  
R.A. Willet ◽  
S.G. Elkomoss
Keyword(s):  
Charge Transfer ◽  
Numerical Solution ◽  
Exact Numerical Solution

A CFD APPROACH TO THE COMPUTATION OF THE ACOUSTIC RESPONSE OF EXHAUST MUFFLERS

2005 ◽  
Vol 13 (02) ◽  
pp. 301-316 ◽  
Author(s):  
A. BROATCH ◽  
X. MARGOT ◽  
A. GIL ◽  
F. D. DENIA
Keyword(s):  
Numerical Solution ◽  
Time Domain ◽  
Cfd Simulation ◽  
Transmission Loss ◽  
Three Dimensional ◽  
Alternative Procedure ◽  
Acoustic Response ◽  
Frequency Domains ◽  
The Time Domain ◽  
Numerical Approaches

The study of the three-dimensional acoustic field inside an exhaust muffler is usually performed through the numerical solution of the linearized equations. In this paper, an alternative procedure is proposed, in which the full equations are solved in the time domain. The procedure is based on the CFD simulation of an impulsive test, so that the transmission loss may be computed and compared with measurements and other numerical approaches. Also, the details of the flow inside the muffler may be studied, both in the time and the frequency domains. The results obtained compare favorably with a conventional FEM calculation, mostly in the ability of the procedure to account for dissipative processes inside the muffler.

Exact Numerical Solution of a Three-Body Ground-State Problem

1962 ◽  
Vol 125 (5) ◽  
pp. 1754-1758 ◽  
Author(s):  
George A. Baker ◽  
J. L. Gammel ◽  
B. J. Hill ◽  
John G. Wills
Keyword(s):  
Numerical Solution ◽  
Ground State ◽  
State Problem ◽  
Exact Numerical Solution ◽  
Three Body

Blast wave propagation in an inhomogeneous atmosphere

1971 ◽  
Vol 50 (4) ◽  
pp. 669-674 ◽  
Author(s):  
P. L. Sachdev
Keyword(s):  
Wave Propagation ◽  
Numerical Solution ◽  
Inhomogeneous Medium ◽  
Blast Wave ◽  
Flow Region ◽  
Exact Numerical Solution ◽  
Cylindrically Symmetric ◽  
Entire Flow ◽  
Blast Wave Propagation ◽  
Simple Quadrature

The Brinkley–Kirkwood theory (1947) is modified to determine the law of propagation of a blast wave in an arbitrary inhomogeneous medium for spherically and cylindrically symmetric cases. The shock path is obtained in terms of a simple quadrature. The numerical results for the shock path and the entire flow region behind the shock, propagating in an exponential atmosphere, show excellent agreement with the exact numerical solution.

Distinguishing Closed Circulations from the Satellite Maps of the Dynamic Topography

2021 ◽  
Author(s):  
Roman Tarakanov
Keyword(s):  
Numerical Solution ◽  
Closed Loop ◽  
Dynamic Topography ◽  
Exact Numerical Solution ◽  
Local Maxima ◽  
Digital Maps ◽  
The Core ◽  
Numerical Grid

<p>An algorithm for distinguishing closed multicore circulations from digital maps of dynamic topography (DT) is described. The algorithm is based on the expansion of circulations over the area from their cores (local maxima/minima of the DT) until the DT thresholds corresponding to these cores are reached. The algorithm is performed in several iterations until the points belonging to the closed circulations are completely exhausted. The algorithm is an exact numerical solution of the problem of determining the value of the DT for a closed loop, the most distant from the core of circulation. The algorithm takes into account the problems of nesting circulations of different signs into each other, the possible intersecting of circulations with different signs on the numerical grid, and the possible existence of islands or floating ice inside the circulations. A method is described for merging smaller DT maps to larger maps with the circulations distinguished from the smaller maps.</p>

Exact numerical solution of the spinless Salpeter equation for the Coulomb potential in momentum space

1994 ◽  
Vol 50 (5) ◽  
pp. 3609-3613 ◽  
Author(s):  
John W. Norbury ◽  
Khin Maung Maung ◽  
David E. Kahana
Keyword(s):  
Numerical Solution ◽  
Coulomb Potential ◽  
Momentum Space ◽  
Exact Numerical Solution
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