We report experimental observations of a horizontally vibrated granular medium made out of sand grains. For large enough acceleration, two counter-rotating convection rolls appear in the upper part of the granular packing, whereas the bed remains unperturbed in the lower part. For increasing acceleration, the free surface exhibits different shapes: slight dome, two ridges and single roof. A qua...

It has been experimentally observed that weakly conducting suspended films of smectic liquid crystals undergo electroconvection when subjected to a large enough potential difference. The resulting counter-rotating vortices form a very simple convection pattern and exhibit a variety of interesting nonlinear effects. The linear stability problem for this system has recently been solved. The conve...

Received: 9 February 2006 / Accepted: 3 May 2006 / Published: 4 May , 2006 __________________________________________________________________________________ Abstract: The present paper is concerned with an analytical study of entropy generation in viscous, incompressible Couette flow between a stationary plate and a moving plate. The flow induced by the moving plate is assisted by a constant p...

The initial bifurcations in rotating Rayleigh-Bénard convection are studied in the range of dimensionless rotation rate 0 < Ω < 2150 for an aspect-ratio-2.5 cylindrical cell. We used simultaneous optical shadowgraph, heat transport and local temperature measurements to determine the stability and characteristics of the azimuthally-periodic wall convection state. We also show that the second tra...

A Large-Eddy Simulation of the tip leakage flow a single airfoil is carried out. The configuration consists non-rotating, isolated between two horizontal plates with gap 10 mm and lower plate. Mach number incoming 0.2, Reynolds based on chord 9.3 × 105. objective present study to investigate best way compute both aerodynamics acoustics flow. In particular, importance inflow conditions predictio...

The movement of microorganism cells in fluid influences various biotic processes, including septicity and marine life ecology. Many organic medicinal applications need to look into the insight mechanism nanofluids containing a microbial suspension. current paper concerns bioconvection ternary hybrid nanofluid (Al2O3-Cu-CNT/water) flow motile gyrotactic microorganisms toward three different geom...

The interaction of mixed convection with thermal radiation of an optical dense viscous fluid adjacent to an isothermal cone imbedded in a porous medium with Rosseland diffusion approximation incorporating the variation of permeability and thermal conductivity is numerically investigated. The transformed conservation laws are solved numerically for the case of variable surface temperature condit...