title: Geometry of reaction interfaces in chaotic flows.
abstract: The analysis of transport-controlled reactions in chaotic flows provides a physical frame to extend the concept of the intermaterial contact area (ICA)--introduced in the purely kinematic case--to mixing systems with diffusion, where the ICA is identified through the reaction interface between segregated reactants. We show that the dynamics of the ICA undergoes a crossover from kinematics-dominated exponential growth to a persistent oscillatory regime resulting from the intertwined action of advection and diffusion. The scaling of the crossover length versus the Peclet number is analyzed.
authors.affiliation: Dipartimento di Ingegneria Chimica, Centro Interuniversitario sui Sistemi Disordinati e sui Frattali nell'Ingegneria Chimica, Universitá di Roma La Sapienza, via Eudossiana 18, 00184 Roma, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Giona
authors.forename: S
authors.initials: S
authors.lastname: Cerbelli
authors.forename: A
authors.initials: A
authors.lastname: Adrover