Results 311 to 320 of about 523,551 (354)
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Science, 1991
An understanding of interstellar shock waves is crucial in determining the structure of the interstellar medium. By causing the gas to radiate, interstellar shocks provide astronomers with valuable diagnostics on both the physical conditions in the interstellar medium and the energy source that produced the shock.
Christopher F. McKee, Bruce T. Draine
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An understanding of interstellar shock waves is crucial in determining the structure of the interstellar medium. By causing the gas to radiate, interstellar shocks provide astronomers with valuable diagnostics on both the physical conditions in the interstellar medium and the energy source that produced the shock.
Christopher F. McKee, Bruce T. Draine
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On the Measurement of Shock Waves
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1987The classic theoretical formulations of finite-amplitude distortion invariably depict continuous sinusoidal waves which develop into sawtooth or N-shaped waves. In practice, where ultrasonic wave- forms at high intensities are measured by a PVDF hydrophone con- nected to an oscilloscope, waveforms are observed with gross asym- metries between positive ...
Kevin J. Parker, E.M. Friets
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Journal of Fluid Mechanics, 1973
Negative or rarefaction shock waves may exist in single-phase fluids under certain conditions. It is necessary that a particular fluid thermodynamic quantity Γ ≡ −½δ In (δP/δν)s/δ In ν be negative: this condition appears to be met for sufficiently large specific heat, corresponding to a sufficient level of molecular complexity.
Philip A. Thompson, K. C. Lambrakis
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Negative or rarefaction shock waves may exist in single-phase fluids under certain conditions. It is necessary that a particular fluid thermodynamic quantity Γ ≡ −½δ In (δP/δν)s/δ In ν be negative: this condition appears to be met for sufficiently large specific heat, corresponding to a sufficient level of molecular complexity.
Philip A. Thompson, K. C. Lambrakis
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Physical Review Letters, 2013
Shock-wave formation is a generic scenario of wave dynamics known in nonlinear acoustics, fluid dynamics, astrophysics, seismology, and detonation physics. Here, we show that, in nonlinear optics, remarkably short, attosecond shock transients can be generated through a strongly coupled spatial and temporal dynamics of ultrashort light pulses ...
Aleksei M. Zheltikov, P. A. Zhokhov
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Shock-wave formation is a generic scenario of wave dynamics known in nonlinear acoustics, fluid dynamics, astrophysics, seismology, and detonation physics. Here, we show that, in nonlinear optics, remarkably short, attosecond shock transients can be generated through a strongly coupled spatial and temporal dynamics of ultrashort light pulses ...
Aleksei M. Zheltikov, P. A. Zhokhov
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Il Nuovo Cimento, 1961
Landau andLifshitz (1959) (1) have mentioned the following result:It two (or more)successive shock waves take a gas from state 1to state 2and from there to state 3,the transition from state 1to state 3can not, in general, be effected by the passages of any one shock wave.
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Landau andLifshitz (1959) (1) have mentioned the following result:It two (or more)successive shock waves take a gas from state 1to state 2and from there to state 3,the transition from state 1to state 3can not, in general, be effected by the passages of any one shock wave.
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On the refraction of shock waves
Journal of Fluid Mechanics, 1989This paper discusses the refraction of plane shock waves in media with arbitrary equations of state. Previous work is reviewed briefly, then a rigorous definition of wave impedance is formulated. Earlier definitions are shown to be unsatisfactory. The impedance is combined with the boundary conditions at the media interface to study both head-on and ...
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The Journal of the Acoustical Society of America, 1989
A shock wave source of the type suitable for treating calculi in the body of a patient has a shock wave tube filled with a shock wave-conducting medium which is closed at one end by a flexible cover adapted to be pressed against the patient, and closed at an opposite end by a membrane.
Matthias Mahler, Manfred Rattner
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A shock wave source of the type suitable for treating calculi in the body of a patient has a shock wave tube filled with a shock wave-conducting medium which is closed at one end by a flexible cover adapted to be pressed against the patient, and closed at an opposite end by a membrane.
Matthias Mahler, Manfred Rattner
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On the structure of shock waves
Journal of Applied Mathematics and Mechanics, 1961The problem of shock waves is examined from the point of view of magnetohydrodynamics in the approximation that the viscosity and thermal conductivity are small, and electrical conductivity very large. Dissipative equations are developed as in magnetohydrodynamics, and shock waves are described as corresponding uniquely to conditions of stability ...
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Theoretical and Mathematical Physics, 1999
The Cauchy problem is considered for the perturbed Hopf equation \(u_t+u\), \(u_x=\varepsilon f(u)\), \(\varepsilon\to 0\). The solution in the continuity domain can be expended in the standard asymptotic series in integral powers of the small parameter. An asymptotic representation is found for the line of propagation of the shock wave.
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The Cauchy problem is considered for the perturbed Hopf equation \(u_t+u\), \(u_x=\varepsilon f(u)\), \(\varepsilon\to 0\). The solution in the continuity domain can be expended in the standard asymptotic series in integral powers of the small parameter. An asymptotic representation is found for the line of propagation of the shock wave.
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