Inward propagating chemical waves in Taylor vortices.
Advection-reaction-diffusion (ARD) waves in the Belousov-Zhabotinsky reaction in steady Taylor-Couette vortices have been visualized using magnetic-resonance imaging and simulated using an adapted Oregonator model. We show how propagating wave behavior depends on the ratio of advective, chemical and diffusive time scales. In simulations, inward propagating spiral flamelets are observed at high Damköhler number (Da). At low Da, the reaction distributes itself over several vortices and then propagates inwards as contracting ring pulses--also observed experimentally.
Thompson
Barnaby W
BW
School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom.
Novak
Jan
J
Wilson
Mark C T
MC
Britton
Melanie M
MM
Taylor
Annette F
AF