Non-Boussinesq Convection at Low Prandtl Numbers: Hexagons and Spiral Defect Chaos

Santiago Madruga, Hermann Riecke

We study the stability and dynamics of non-Boussinesq convection in pure gases (CO${}_2$ and SF${}_6$) with Prandtl numbers near $Pr\simeq 1$ and in a H${}_2$-Xe mixture with $Pr=0.17$.…