
B. Singh:
Dispersion relations in a generalized monoclinic thermoelastic solid halfspace

H.A. Attia:
Hydromagnetic flow of a dusty fluid between parallel porous plates, considering the ion slip

M. Sztyren:
Solutions for the highergrade hybrid model of layered superconductors

J.P. Vishwakarma, G. Nath:
Converging detonation waves in a dusty gas
 B. Singh:
Dispersion relations in a generalized monoclinic thermoelastic
solid halfspace

The plane wave propagation in a homogeneous, monoclinic, generalized thermoelastic solid medium with thermal
relaxations is studied. Three types of plane waves: quasiP (qP), quasithermal and quasiSV (qSV) waves,
are shown to exist. The analytical expressions for their dimensional velocities of propagation are
obtained. The velocities of these waves are found to depend on the angle of propagation. Angles of
reflection for plane waves are found to be different from their angles of incidence. Numerical
computations are carried out to show the variations of velocities of plane waves for different parameters.
Effects of anisotropy, frequency and thermoelastic coupling coefficient on wave propagation are observed.
Contents
 H.A. Attia:
Hydromagnetic flow of a dusty fluid between parallel porous plates,
considering the ion slip

In the present study, the transient hydromagnetic flow between parallel porous plates of a dusty viscous,
incompressible, electrically conducting fluid under the influence of a constant pressure gradient is studied,
considering the ion slip. The parallel plates are assumed to be porous and subjected to uniform suction from
above and injection from below, while the fluid is acted upon by an external uniform magnetic field applied
perpendicular to the plates. The equations of motion are solved analytically to yield the velocity
distributions for both the fluid and dust particles as functions of time and space.
Contents
 M. Sztyren:
Solutions for the highergrade hybrid model of layered superconductors

A class of basic solutions for a model of layered superconductors is constructed. The considerations are
based on the highergrade hybrid model, constructed in the previous paper. In particular, for any range
K of the Josephson interlayer couplings, we determine the spectrum of excited states with respect
to all types of ground states calculated there for an infinite uniform superconductor. We discuss also
solutions for a finite number of layers with periodic boundary conditions. In this way, instances of the
amplitudemodulated solutions for the infinite stack of layers are found.
Contents
 J.P. Vishwakarma, G. Nath:
Converging detonation waves in a dusty gas

The problem of converging detonation waves propagating through a dusty gas and releasing a constant amount
of energy per unit mass is studied. The dusty gas is assumed to be a mixture of small solid particles and
a perfect gas. The solid particles are distributed continuously in the perfect gas. An expression for the
similarity exponent is determined for the detonation wave travelling in the ChapmanJouguet regime. Also,
the variation of the flow variables just behind the detonation front with the radius of the front are
obtained. It is found that the presence of dust particles in the medium has a significant effect on the
similarity exponent and the flow variables.
Contents
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