Browsing by Author "B. Kishor"

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Effects of MHD free convection and mass transfer on the flow past a vibrating infinite vertical circular cylinder
(Springer-Verlag, 1989) A.K. Agrawal; B. Kishor; A. Raptis
The effects of MHD free convection and mass transfer are taken into account on the flow past a vibrating infinite isothermal and constant heat flux vertical circular cylinder. The expressions for velocity, temperature, concentration and skin-friction of the fluid are obtained in closed form by using Laplace transform technique. The effects of Pr (Prandtl number), Sc (Schmidt number), Gr (Grashof number, Gr>0 implies cooling and Gr<0 heating of the cylinder), Gm (modified Grashof number), M (magnetic field parameter) and variation of time on velocity distribution have been studied graphically. The results presented in this paper agree with the results of Lien and Chen when magnetic parameter approaches zero. © 1989 Springer-Verlag.
On the kinematics of rigid involute gear pair with moving axes of rotation
(Publ by American Soc of Mechanical Engineers (ASME), 1989) B. Kishor; S.K. Gupta
In this paper, planar motion of a pair of rigid spur gears having unseparated teeth of involute form is analyzed when relative movement of gear axes is permitted. Expressions for variations in angular velocity ratio, operating pressure angle, sliding velocities, sweep velocities, transmission error and absolute velocity of the actual point of contact have been developed that make explicit their dependence on the relative velocity of gear centres. The path of contact does not, in general, remain coincident with the conventional fixed common normal at all instants of time. It has been indicated that the kinematics of planetary gearing can be studied as a special case of the general kinematic analysis presented in this paper.
STRESS FATIGUE LIFE RELATION UNDER TENSION-IMPACT FATIGUE.
(1987) A. Bhattacharya; B. Kishor; P.C. Upadhyay
An analysis for the relation between impact stress and the fatigue life is presented in this paper. Using expressions of deformation work, specific deformation work, and the impact stress, a power law relation between impact stress and fatigue life has been obtained. To verify the proposed relation, fatigue lives of carbon steel specimens have been observed on a tension-impact fatigue testing device, designed and fabricated in the laboratory. Values of impact stresses have been calculated using finite element analysis. The final expression between impact stress and fatigue life comes out in the form of O. H. Basquin's law. The constants of this expression have been evaluated using least square approximation.
THERMAL AND MASS DIFFUSION ON MHD NATURAL CONVECTION FLOW BETWEEN TWO INFINITE VERTICAL MOVING AND OSCILLATING POROUS PARALLEL PLATES.
(1988) A.K. Agrawal; B. Kishor
The combined buoyancy effects of thermal and mass diffusion on viscous incompressible hydromagnetic flows confined between two infinite vertical parallel porous plates moving in opposite directions while one plate is executing oscillations about a constant mean has been examined. Mean velocity, mean temperature, the phase and the amplitude of skin friction and the rate of heat transfer for different values of Prandtl number, Schmidt number, Grashof numbers, magnetic field parameter and Eckert number have been shown graphically. The numerical values of skin friction and mean rate of heat transfer have been calculated. The equations governing the problem are also solved approximately for velocity, temperature and concentration distributions.