All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Journal of Chemical Physics

Volume

104

Issue

24

Publisher

American Institute of Physics

Publication Date

3-1996

First Page

9926

Last Page

9931

DOI

10.1063/1.471720

Abstract

Chemical waves induce density gradients in fluids which may lead to convection. This paper studies the convective effects on chemical waves propagating in porous media or in fluids confined between two parallel vertical walls. Chemical waves in the iodate–arsenous acid system are modeled with a one variable reaction‐diffusion equation. The fluid flow is modeled using Darcy’s law. A linear stability analysis on convectionless fronts shows a transition to convection. The full nonlinear equations describing the convective front are solved numerically on a vertical slab. Convective fronts propagate faster than convectionless fronts. Near the onset of convection, the fronts are raised on one side of the slab and lowered on the opposite side. Away from the onset, the fronts are raised at the middle of the slab with the opposing sides at the same height.

Comments

http://link.aip.org/link/doi/10.1063/1.471720

Published by the American Institute of Physics in Journal of Chemical Physics. Publisher PDF is available for download through the link above.