Pattern formation in annular convection

Pattern formation in spatially forced thermal convection

In this paper, we present experimental results on the interplay between two different symmetry breaking mechanisms in a pattern forming system, namely inclined layer convection (ILC) with a spatially modulated heated plate. By varying the relative strength and relative orientation, we explored in detail the interplay of these symmetry breaking mechanisms. We found a stabilization of spatio-temp...

Pattern formation in vertically oscillated convection

A fluid layer driven out of equilibrium by both a thermal gradient and timeperiodic vertical oscillations displays a number of interesting behaviour. Here we review results from the first experimental investigation of this system as well as a number of related and novel numerical findings. At primary onset these results include modulation-enhanced conduction stability as well as fluid motion in...

Pattern formation in inclined layer convection

We report experiments on thermally driven convection in an inclined layer of large aspect ratio in a fluid of Prandtl number sigma approximately 1. We observed a number of new nonlinear, mostly spatiotemporally chaotic, states. At small angles of inclination we found longitudinal rolls, subharmonic oscillations, Busse oscillations, undulation chaos, and crawling rolls. At larger angles, in the ...

Pattern formation in reaction-diffusion and reaction-diffusion-convection systems

Convection-driven pattern formation in phase-separating binary fluids.

Using a thermal-lattice Boltzmann model, we examine the rich phase behavior that develops when partially miscible fluids evolve in the presence of a vertical temperature gradient, which encompasses the critical temperature T(c) of the mixture. In particular, a binary AB fluid is confined between two plates in a gravitational field. The upper plate is fixed below T(c) and hence, the nearby fluid...