Reactive-infiltration instability in a Hele-Shaw cell influenced by initial aperture and flow rate

Abstract

We experimentally investigate dissolution morphologies in a radial Hele-Shaw cell. We observe a unique phenomenon where the dissolution front shifts from stable to unstable and uncover the role of buoyancy-driven convection in forming radial stripes (dissolution ``flower'') on the solid surface. We propose a phase diagram to predict the transitions of dissolution patterns.