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  • 1
    Electronic Resource
    Electronic Resource
    Interaction between two electromagnetic solitary waves in a plasma (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 35-40 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: From numerical solutions of two colliding electromagnetic solitary waves, it is shown that their shapes are modified, and a trailing wake of plasma oscillations is produced by the collision. They therefore cannot be classified as solitons. For sufficiently large relative velocities, however, it is shown that the modifications to the vector and scalar potentials, as well as to the wake due to the collision, are small. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871470
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of ion drift on small-amplitude ion-acoustic solitons (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 26-28 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Some properties of small-amplitude ion-acoustic solitons in a plasma consisting of nondrifting electrons and drifting ions are investigated. Electron inertia effects are shown to be considerably more important than relativistic effects. It is also shown that ion-acoustic soliton solutions exist only if the ion drift velocity is less than the electron thermal velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859946
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of ion drift on arbitrary-amplitude ion-acoustic solitary waves (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 555-559 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The properties of arbitrary-amplitude solitary waves in a plasma consisting of drifting ions and nondrifting electrons are investigated. The conditions for the existence of solitary-wave solutions are determined. It is shown that electron inertia has the significant effect of restricting the regime of solitary waves to ion drift velocities that are less than the electron thermal speed. Because of this restriction relativistic effects are small.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859906
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  • 4
    Electronic Resource
    Electronic Resource
    Envelope solitary waves in nonuniform or dissipative media (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 1511-1519 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: For a weakly nonuniform medium, a solitary wave solution of the variable-coefficient nonlinear Schrödinger equation is obtained through second order in the expansion parameter. From a generalization of the second-order result, the form of the solution to all orders is derived from which the conditions for an exact, distortionless solitary wave in a nonuniform medium are obtained. By use of a transformation, these results are shown to apply a weakly dissipative medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859476
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of electron inertia on solitary waves in a plasma with an ion beam (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 2517-2522 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The properties of solitary waves in a plasma with an ion beam are investigated. The two conditions for the existence of solitary-wave solutions are determined and presented graphically in parameter space. Electron inertia is shown to restrict the regime of the fast and slow beam solitary waves to beam velocities that are less than the electron thermal velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860167
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of higher-order dispersion on envelope solitons (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 889-900 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The soliton modifications resulting from the addition of a small third derivative term, due to higher-order dispersion, to the nonlinear Schrödinger equation are investigated. Based on direct perturbation theory, it is shown that through first order, the soliton phase and velocity are modified, but the shape, amplitude, and width are unchanged. The radiation stimulated by the third derivative term, which is not predicted by the perturbation theory, is also derived. The expression obtained confirms the result of Wai (Ph.D. thesis, University of Maryland, 1988), which was obtained by a different method. The rate of change of the soliton amplitude due to this radiation, which emerges in front of the soliton, is calculated. The nonlinear term that drives the radiation is shown to grow to a value that is much larger than the unperturbed value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859288
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  • 7
    Electronic Resource
    Electronic Resource
    Reflection of an ion-acoustic soliton from a planar boundary (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 73-80 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The reflection of a planar ion-acoustic soliton from an insulated or a biased metallic planar wall is studied. Numerical solutions of the cold-ion fluid equations, the Boltzmann distribution for electrons, and Poisson's equation show that the incident soliton is partially reflected and partially absorbed by the wall. The reflection is larger for wider solitons and for a more negatively biased wall. The numerical results are in reasonable agreement with the recent experiment of Nishida [Phys. Fluids 27, 2176 (1984)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866061
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  • 8
    Electronic Resource
    Electronic Resource
    Amplification of ion-acoustic solitary waves by an ion beam (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 3185-3188 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of a cold ion beam on an ion-acoustic solitary wave whose potential is large enough to reflect the ion beam are studied in the regime in which the solitary-wave response to the beam is adiabatic. It is shown that the solitary wave can be amplified by a large factor, and that it is accelerated until its velocity equals the beam velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860424
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  • 9
    Electronic Resource
    Electronic Resource
    Finite-amplitude ion-acoustic solitons in weakly inhomogeneous plasmas (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 2375-2381 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The properties of an ion-acoustic soliton in a weakly inhomogeneous plasma are studied. Unlike previous analyses, the soliton amplitude is not required to be small. The ion generation rate is assumed to be either proportional to the electron density or to be uniform. Assuming that the local soliton width is small compared with the scale length of the plasma inhomogeneity, a perturbation theory is developed which gives the local speed and amplitude of the soliton. For a small amplitude soliton, simple expressions for the local soliton speed, peak soliton potential, and peak soliton ion density are derived. It is shown that both the soliton velocity relative to the ion drift velocity and the peak soliton potential do not vary greatly as the soliton moves from the plasma center toward the sheath. The peak ion density, however, varies over a wider range. These results are shown to agree with those from direct numerical integration of the basic equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865243
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  • 10
    Electronic Resource
    Electronic Resource
    Numerical investigations on the heat transfer in turbulent oscillating pipe flow (2000)
    Springer
    Heat and mass transfer 36 (2000), S. 135-141 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract  The examinations on the heat transfer in developing laminar oscillating pipe flow presented before [1] have been extended to include turbulence as well. A suitable low-Reynolds-number k-ɛ-turbulence model was incorporated in an existing 2D-simulation code for oscillating flow conditions and subsequent examinations focused on the heat transfer associated with turbulent oscillating flow. The calculations cover a wide range of the characteristic parameters and the results are summarised in form of new heat transfer correlations to suit with the operating conditions of regenerative thermal machines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002310050375
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