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- W3092124610 abstract "This article shows how to consistently and accurately manage the Lagrangian formulation of chemical reaction equations coupled with the superficial velocity formalism introduced in the late 80s by Quintard and Whitaker. Lagrangian methods prove very helpful in problems in which transport effects are strong or dominant, but they need to be periodically put back in a regular lattice, a process called remeshing. In the context of digital rock physics, we need to ensure positive concentrations and regularity to accurately handle stagnation point neighborhoods. These two conditions lead to the use of kernels resulting in extra-diffusion, which can be prohibitively high when the diffusion coefficient is small. This is the case especially for reactive porous media, and the phenomenon is reinforced in porous rock matrices due to Archie’s law. This article shows how to overcome this difficulty in the context of a two-scale porosity model applied in the Darcy-Brinkman-Stokes equations, and how to obtain simultaneous sign preservation, regularity and accurate diffusion, and apply it to dissolution processes at the pore scale of actual rocks." @default.
- W3092124610 created "2020-10-15" @default.
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- W3092124610 date "2020-12-01" @default.
- W3092124610 modified "2023-10-16" @default.
- W3092124610 title "Improvement of remeshed Lagrangian methods for the simulation of dissolution processes at pore-scale" @default.
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- W3092124610 doi "https://doi.org/10.1016/j.advwatres.2020.103780" @default.
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