Skip to Main content Skip to Navigation
Journal articles

Microfluidic measurement of the dissolution rate of gypsum in water using the reactive infiltration-instability

Abstract : We present an original method for measuring the intrinsic dissolution rate of gypsum. We use a simple microfluidic setup, with a gypsum block inserted between two polycarbonate plates, which is dissolved by water. By changing the flow rate and the distance between the plates, we can scan a wide range of Péclet and Damköhler numbers, characterizing the relative magnitude of advection, diffusion and reaction in the system. We find the dissolution to be unstable, with a formation of a characteristic fingering pattern. The dissolution rate can then be calculated from the initial wavelength of this pattern. Alternatively, it can also be estimated from the time it takes for the gypsum chip to get completely dissolved near the inlet channel. The method presented here is general and can be used to assess the dissolution rates of other minerals.
Document type :
Journal articles
Complete list of metadatas

Cited literature [9 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-02294032
Contributor : Nathalie Pothier <>
Submitted on : Monday, September 23, 2019 - 9:28:29 AM
Last modification on : Wednesday, September 23, 2020 - 4:38:40 AM
Long-term archiving on: : Sunday, February 9, 2020 - 3:56:17 AM

File

e3sconf_wri-162018_04010.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Florian Osselin, Pawel Kondratiuk, Olgierd Cybulski, Piotr Garstecki, Piotr Szymczak. Microfluidic measurement of the dissolution rate of gypsum in water using the reactive infiltration-instability. E3S Web of Conferences, EDP Sciences, 2019, 98, 04010 (5p.). ⟨10.1051/e3sconf/20199804010⟩. ⟨insu-02294032⟩

Share

Metrics

Record views

171

Files downloads

186