Pattern formation in inclined layer convection

We report experiments on thermally driven convection in an inclined layer o f large aspect ratio in a fluid of Prandtl number sigma approximate to 1. W e observed a number of new nonlinear, mostly spatiotemporally chaotic, stat es. At small angles of inclination we found longitudinal rolls, subharmonic oscillations, Busse oscillations, undulation chaos, and crawling rolls. At larger angles, in the vicinity of the transition from buoyancy- to shear-d riven instability, we observed drifting transverse rolls, localized bursts, and drifting bimodals. For angles past vertical, when heated from above, w e found drifting transverse rolls and switching diamond panes.