Papers by Keyword: G-Jitter

Abstract: The effects of stimulated g-jitter which come together with heat and mass transfer by mixed convection in microgravity situation on MHD flow of Oldroyd - B fluid in porous space is investigated for a particular system. The system comprises of a pair of heated up perpendicular parallel infinite plates maintained at constant although various concentrations and temperatures. By using modified Darcy’s law, the equations governing the flow are modelled. These equations are solved exactly for the distributions of stimulated velocity, temperature and concentration. Interestingly the solutions for second grade and Maxwell fluids are recovered as new limiting cases of the present general results. Similar result in the relevant literature relating to Newtonian fluid is also obtained as a special case of the present solution. Finally particular attention is given to the graphical results for the velocity profiles of the oscillating flow in the channel. The analysis on the variations of embedded flow parameters in the solution expressions are presented and discussed.

Abstract: This paper studies the effect of periodical gravity modulation, or g-jitter induced magnetohydrodynamics (MHD) mixed convection flow past an inclined stretching sheet. Using appropriate non-dimensional variables, the governing partial differential equations are first transformed into non-dimensional form. The obtained non-dimensional equations are then solved numerically using Keller-box method. The features of the flow with heat transfer characteristics for different values of frequency, amplitude and magnetic parameters on the velocity and temperature profiles are analyzed and discussed. The behaviour of physical quantities such as skin friction and heat transfer coefficients are also investigated. To validate the present numerical results, comparison with published results is done and found to be in a good agreement.

Abstract: A liquid bridge formed between two coaxial, circular, solid disks was vibrated to study the effects of small vibrations on the stability of a free surface of the liquid bridge. The liquid bridge was vibrated by tapping its upper disk and by using a motor placed nearby. Experiments were conducted for isothermal liquid bridges of silicone oil (5 cSt) with a disk diameter of 7.0 mm. By subjecting the liquid bridge to small vibrations, the characteristics of vibration-induced surface oscillation have been clearly determined.