When a blunt cutting tool is forced through a thin elastic sheet that is held along its lateral boundaries, a strikingly regular wavy cut can be left behind, examples of which are presented in Fig. 1. The thin film is brittle, hence it undergoes negligible irreversible deformation besides fracture. For tools much wider than the film’s thickness, the crack tip follows a highly reproducible nonsi...

are the basis of visible and still shorter wave radiations. The electric waves in the narrow sense of the Hertzian waves occur as the result of oscillations of fairly large electric charges in oscillatory circuits. With a frequency of 10s cycles per second the wave-length is 3 metres and with 107 cycles per second it is 30 metres. The wave-lengths we are now concerned with are generally between...

Self-propelled colloids (swimmers) in confining geometries follow trajectories determined by hydrodynamic interactions with the bounding surfaces. However, typically these interactions are ignored or truncated to the lowest order. We demonstrate that higher-order hydrodynamic moments cause rod-like swimmers to follow oscillatory trajectories in quiescent fluid between two parallel plates, using...

An analysis of radiation and soret effect on visco-elastic mhd oscillatory flow with heat and mass transfer through a porous medium bounded by two infinite horizontal parallel porous plates in presence of chemical reaction and a heat source has been presented when one plate is kept at rest while the other is oscillating in its own plane. The fluid is considered to be non-Newtonian characterized...

An analysis of an oscillatory magnetohydrodynamic (MHD) convective flow of anOldroyd-B, incompressible and electrically conducting fluid through a porous medium bounded within two infinite vertical parallel porous plates is carried out. The fluid is injected with constant velocity through the stationary porous plate and simultaneously sucked with same constant velocity through the other oscilla...

In this paper we have studied the effect of free convection on the heat transfer and flow through variable porous medium which is bounded by two vertical parallel porous plates. In this study it is assume that free stream velocity oscillates with time about a constant mean. Periodic temperature is considered in the moving plate. Effect of different parameters on mean flow velocity, Transient ve...

Steady motion of two types incompressible Maxwell fluids with power-law dependence viscosity on the pressure is analytically studied between infinite horizontal parallel plates when gravity effects are taken into consideration. Simple and exact expressions established for permanent components starting solutions corresponding to oscillatory motions induced by lower plate that oscillates in its p...