Experimental Study of Binary Fluid Convection in a Quasi 1-Dimensional Cell without Reflections from the Sidewalls
With properly chosen parameters, convection in binary fluid mixtures sets in via a Hopf bifurcation leading to travelling waves. In this case one has to distinguish between a convectively unstable and an absolutely unstable situation. We present an observation in a cell where the fluid becomes unstable at the absolute instability point, not at the convective one as in most other experiments. This is done by preventing the sides of the cell from reflecting the travelling wave.
KeywordsHopf Bifurcation Convection Cell Copper Plate Small Disturbance Absolute Instability
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