

	Mechanics På svenska

Project

Propagation and diffraction of sound in fluids

Research Area:

Theoretical and computational mechanics

Project Members:

Enflo, B.O.

Gurbatov, S.N.

Hedberg, C.M.

Peradzynski, Z.

Rudenko, O.

Sponsor:

Göran Gustafsson's Foundation, KVA, TFR

Project Description

In the project basic problems of nonlinear acoustic wave propagation are studied. Burgers` equation and its generalizations are studied by analytical and numerical methods. Applications are found to propagation of shocks and signals in the sea and in the atmosphere. Examples of problems studied by use of equations of Burgers` type are: studying the decay of plane wave pulses with complicated structure, finding asymptotic waveforms originating from spherical and cylindrical sine waves and short pulses, nonlinear acoustic wave propagation in dispersive and layered media and nonlinear propagation of sonic boom waves.

Publications related to the project

Year	Title
2001	The decay of Plane Wave Pulses With Complex Structure in a Nonlinear Dissipative Medium Acta Acustica 87 16-28 (Published)
2001	Nonlinear standing waves in a layer excited by the periodic motion of its boundary Acoustical Physics 47 525-533 (Published)
2001	Fourier decomposition of a plane nonlinear sound wave developing from a sinusoidal source Acta Acustica 87 163-169 (Published)
2000	Nonlinear N-wave propagation through a one-dimensional phase screen Acta Acustica 86 229-238 (Published)
2000	Sound beams with shockwave pulses Acoustical Physics 46 728-733 (Published)
1999	The decay of pulses with complex structure according to Burgers' equation Acta Acustica 85 181-196 (Published)
1998	On the connection between the asymptotic waveform and the fading tail of an initial N-wave in nonlinear acoustics. Acta Acustica 84 401-413 (Published)

Internal Reports related to the project

Year	Title	Document Type