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Title: Quantifying Dissolution Dynamics in Porous Media Using a Spatial Flow Focusing Profile

Journal Article · · Geophysical Research Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Institute of Theoretical Physics Faculty of Physics University of Warsaw Warsaw Poland
  2. Los Alamos National Laboratory Earth and Environmental Sciences Division Los Alamos NM USA
  3. Department of Earth &, Environmental Sciences University of Minnesota Minneapolis MN USA, Saint Anthony Falls Laboratory University of Minnesota Minneapolis MN USA

Abstract The diverse range of patterns in porous media formed by dissolution processes depends on the relative magnitude of flow, transport, and chemical reactions at pore surfaces. However, distinguishing between regimes often relies solely on qualitative, visual comparisons of emergent structures. Here, we propose a quantitative measure capable of identifying different regimes using the concept of the spatial flow focusing profile, which segments the medium into cross sections along the flow direction to calculate the flow focusing index for each section. We employ this measure in numerical simulations of a dissolving porous medium using a pore network model. We obtain a morphological phase diagram of dissolution patterns, which we characterize using the flow focusing profile. In particular, we demonstrate that analyzing the temporal changes in the profile allows one to quantitatively distinguish between wormholing and channeling. The transition between them is shown to be affected by the heterogeneity of the system.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0023429
OSTI ID:
2467557
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 20 Vol. 51; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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