Exotic dynamics of bimolecular reaction–diffusion fronts in immiscible systems

Sotos C. Generalis, A. De Wit, Philip M. J. Trevelyan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Dynamics of bimolecular ABC reaction–diffusion (RD) fronts have been well characterised in miscible systems. We study here their properties when reactants A and B are initially dissolved in two immiscible solvents put in contact. Neglecting any convective effects, we show that bimolecular RD fronts developing in such immiscible systems upon transfer from the reactants from one phase to the other can change directions up to four times, contrary to miscible systems where only two changes of direction are possible. Further, the conditions for which two local maxima in the reaction rate can exist are identified.
Original languageEnglish
Article number108821
Number of pages8
JournalApplied Mathematics Letters
Early online date9 Aug 2023
Publication statusPublished - Dec 2023

Bibliographical note

© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the
CC BY license (http://creativecommons.org/licenses/by/4.0/).


  • Chemical front, Reaction–diffusion Interface, Small time asymptotics, Mass transfer


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