4.5 Article

Upscaling coupled heterogeneous diffusion reaction equations in porous media

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Limits of Classical Homogenization Procedure for Coupled Diffusion-Heterogeneous Reaction Processes in Porous Media

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Summary: This study focuses on upscaling of coupled diffusion-heterogeneous reaction problem in porous media for different orders of magnitude of the Damkohler number. It is found that the macroscopic model accurately predicts the coupled diffusion-reaction process at the macroscale in the range of small Damkohler number under slow reaction rate conditions, while errors occur under moderate and high reaction rates. Classical homogenization technique fails to capture the complex physics at short time when chemical equilibrium is not reached.

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