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Radially traveling waves in modulated rotating convection
Antonio Rubio
ASU
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Radially traveling waves in modulated rotating convection Antonio Rubio ASU |
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ABSTRACT Recent experiments in rotating convection have shown that the spatio-temporal bulk convective state with Kuppers-Lortz dynamics can be suppressed by small amplitude modulations of the rotation rate. The resultant axisymmetric target patterns develop into axisymmetric traveling wave states as the modulation amplitude and Rayleigh number are increased. Using fully 3D time-dependent Navier-Stokes Boussinesq equations with physical boundary conditions, we are able to numerically reproduce the experimental results and gain physical insight into the responsible mechanism, and relate the traveling wave state to a saddle-node on an invariant circle bifurcation. |