12 citations · 19 across the 7 of their papers we have counts for
5 papers · 1 filter
Chemical front propagation in periodic flows: FKPP vs G
Alexandra Tzella, Jacques Vanneste
We investigate the influence of steady periodic flows on the propagation of chemical fronts in an infinite channel domain. We focus on the sharp front arising in Fisher--Kolmogorov…
Dispersion in rectangular networks: effective diffusivity and large-deviation rate function
Alexandra Tzella, Jacques Vanneste
The dispersion of a diffusive scalar in a fluid flowing through a network has many applications including to biological flows, porous media, water supply and urban pollution. Motiv…
FKPP fronts in cellular flows: the large-Péclet regime
Alexandra Tzella, Jacques Vanneste
We investigate the propagation of chemical fronts arising in Fisher--Kolmogorov--Petrovskii--Piskunov (FKPP) type models in the presence of a steady cellular flow. In the long-time…
Bounding the scalar dissipation scale for mixing flows in the presence of sources
Alexandros Alexakis, Alexandra Tzella
We investigate the mixing properties of scalars stirred by spatially smooth, divergence-free flows and maintained by a steady source-sink distribution. We focus on the spatial vari…
The role of a delay time on the spatial structure of chaotically advected reactive scalars
Alexandra Tzella, Peter H. Haynes
The stationary-state spatial structure of reacting scalar fields, chaotically advected by a two-dimensional large-scale flow, is examined for the case for which the reaction equati…