scholarly journals THEORY OF TWO-DIMENSIONAL FERMI LIQUIDS (Ⅲ)——TRA-NSPORT PROPERTIES AND SOUND PROPAGATION

1990 ◽  
Vol 39 (4) ◽  
pp. 580
Author(s):  
CUI SHI-MIN ◽  
CAI JIAN-HUA
Keyword(s):  
Sound Propagation ◽  
Fermi Liquids ◽  
Two Dimensional

Flow-dependent modeling of acoustic propagation based on DG-FEM method

2021 ◽  
Author(s):  
Zichen Wang ◽  
Jian Xu ◽  
Xuefeng Zhang ◽  
Can Lu ◽  
Kangkang Jin ◽  
...  
Keyword(s):  
Sound Propagation ◽  
Transmission Loss ◽  
Acoustic Propagation ◽  
Water Area ◽  
Current Speed ◽  
Propagation Model ◽  
Propagation Loss ◽  
Two Dimensional ◽  
Underwater Sound ◽  
Ocean Environment

AbstractThis paper proposes a two-dimensional underwater sound propagation model using the Discontinuous Galerkin Finite Element Method (DG-FEM) to investigate the influence of current on sound propagation. The acoustic field is calculated by the convected wave equation with the current speed parameter. Based on the current speed data from an assimilation model, a two-dimensional coupled acoustic propagation model in the Fram Strait water area is established to observe the variability in propagation loss under different seasonal velocities in the real ocean environment. The transmission loss and signal time structure are examined. The results obtained in different source frequencies are also compared. It appears that the current velocity, time and range variation all have an effect on underwater sound propagation.

scholarly journals Spectral function of two-dimensional Fermi liquids

1998 ◽  
Vol 57 (15) ◽  
pp. 8873-8877 ◽  
Author(s):  
Christoph J. Halboth ◽  
Walter Metzner
Keyword(s):  
Spectral Function ◽  
Fermi Liquids ◽  
Two Dimensional

Sound propagation in the two dimensional magnetic system K2NiF4

1976 ◽  
Vol 56 (6) ◽  
pp. 479-480 ◽  
Author(s):  
G. Gorodetsky ◽  
B. Lüthi ◽  
M. Eibschütz ◽  
H.J. Guggenheim
Keyword(s):  
Sound Propagation ◽  
Magnetic System ◽  
Two Dimensional

LATTICE GAS WAVE PROPAGATION MODELS INCLUDING DISSIPATION

1995 ◽  
Vol 03 (01) ◽  
pp. 69-93 ◽  
Author(s):  
YASUSHI SUDO ◽  
VICTOR W. SPARROW
Keyword(s):  
Wave Propagation ◽  
Random Walk ◽  
Diffusion Equation ◽  
Lattice Gas ◽  
Sound Propagation ◽  
Two Dimensional ◽  
Propagation Models ◽  
One Dimensional ◽  
Lattice Gas Models ◽  
Wave Models

New lattice gas models for one-dimensional (1D) and two-dimensional (2D) sound propagation have been recently proposed by the authors. These models were dissipationless and deterministic. In this paper, it will be shown how dissipation effects can be included into these lattice gas wave models. To simulate these dissipation effects, the lattice gas particles are assumed to take a random walk. The resulting models combine the authors' lattice gas wave models with published lattice gas models for the diffusion equation. The formulations are stable and consistent.

Sign in / Sign up

Export Citation Format

Share Document