Browsing by Author "V.D. Sharma"

Now showing 1 - 6 of 6

A note concerning the corrigendum to "On the non-uniform propagation of weak discontinuities in magnetogasdynamics"
(Springer-Verlag, 1984) V.D. Sharma; Radhe Shyam
[No abstract available]
Behaviour of a discontinuity at the wave-head propagating through a relaxing gas
(Springer-Verlag, 1982) J. Sharma; R. Shyam; V.D. Sharma
The rate of amplification of a discontinuity in the velocity gradient is evaluated at the wave-head in a spatially uniform but time evolving flow of a relaxing gas. The paper investigates the effects of relaxation (present in the flow) and the initial wave front curvature on the growth and decay behaviour of waves in the thermodynamical state of weak or strong equilibrium. © 1982 Springer-Verlag.
Behaviour of Finite Amplitude Waves in a Radiating Gas
(1981) V.D. Sharma; Radhe Shyam; V.V. Menon
A differential approximation for the equations of radiative transfer in a grey gas of arbitrary opacity including the effects of radiative flux, pressure and energy density is applied in a study of the effects of thermal radiation on the growth and decay properties of finite amplitude waves of arbitrary shape propagating through a thermally inviscid gas. Copyright © 1981 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
On the breakdown of wave fronts of characteristics in an ideal dissociating gas
(1981) V.D. Sharma; J. Sharma; Radhe Shyam
Using the method of characteristics, the problem of breaking or non-breaking of waves is studied in a plane cylindrically or spherically symmetric flow of an ideal dissociating gas. It is investigated as to how the effects of dissociation and that of the wave front curvature influence the breaking or non-breaking of waves. In a symmetrical converging gas motion a remarkable difference between the behaviours of cylindrical and spherical waves is discovered. © 1981.
Wave propagation in a steady supersonic flow of a radiating gas past plane and axisymmetric bodies
(Springer-Verlag, 1988) L.P. Singh; V.D. Sharma; N. Gupta
Using the method of wavefront analysis the paper presents an analysis of shock wave formation in a two-dimensional steady supersonic flow of a radiating gas past plane and axisymmetric bodies such as a beak and sharp edged ring. Transport equations are derived which lead to the determination of the shock formation distance and also to conditions which insure that no shock will ever evolve on the wavefront. It is assessed as to how the shock formation distance is influenced by the presence of thermal radiation, the initial body curvature and upstream flow Mach number M0>1. © 1988 Springer-Verlag.
Weak discontinuities in a dissociating gas
(Springer-Verlag, 1981) V.D. Sharma
The effects of non-equilibrium dissociation and that of the wave front curvature on the propagation of weak discontinuities headed by wave fronts of arbitrary shape and their consequent formation into shock waves are examined. It is found that all compressive waves, except in one special case of converging waves, grow without bound only if the magnitude of the initial discontinuity associated with the wave exceeds a critical value. It is shown that, in this special case, the stabilizing influence of curvature for converging waves is not strong enough to overcome the instabilities associated with the gasdynamic phenomenon involved. © 1981 Springer-Verlag.