Finite-amplitude regimes of the short-wave Marangoni-Benard convective instability

Long-wave Marangoni instability with vibration

The Effects of Thermal Noise in a Rayleigh-Benard Cell Near Its First Convective Instability

In recent experiments on the initial stages of pattern formation in a Rayleigh Benard convection cell, Meyer e t al. I1) observed very irregular patterns. In these experiments, the fluid was subjected to a heat current that varied either linearly or periodically in time from below to above the onset of the first instability. If the side wall of the cylindrical cell was made of a material with a...

Target patterns arising from the short-wave instability in near-critical regimes of reaction-diffusion systems

The supercritical short-wave oscillatory bifurcation is studied in finite systems using the amplitude ~Ginzburg-Landau! equation. Numerical simulations show that a zero-flux boundary stabilizes sources of target patterns. As a result, stable sources attached to the boundary can exist at small overcriticality, under the condition of convective instability of the homogeneous steady state. Oscilla...

Large Amplitude, Short Wave Peristalsis

6 Valveless, tubular pumps are widespread in the animal kingdom, but the mechanism by which these pumps generate fluid flow are often in dispute. Where the pumping mechanism of many organs was once described as peristalsis, other mechanisms, such as dynamic suction pumping, have been suggested as possible alternative mechanisms. Peristalsis is often evaluated using criteria established in a tec...

Pretransitional Effects in the Rayleigh-benard Instability