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Gas displacement in porous media is a vital process with broad industrial and environmental applications. A prominent example is underground hydrogen storage, where understanding the interaction and mixing of hydrogen with cushion gas is essential. This study investigates irregularities in the dispersion behaviour of gas mixtures during opposing flow scenarios, specifically injection and production, from a modelling perspective. Compared to Newtonian fluids, the gaseous nature of the system introduces significant challenges, including non-ideal mixing, compressibility, and higher diffusivity. The results reveal distinct dispersion patterns between injection and production, with increased non-ideality in the gas mixture intensifying these discrepancies. Unlike dispersivity observed in Newtonian fluids within porous media, this research demonstrates that gas displacement dispersivity is influenced not only by the properties of the porous medium but also by the characteristics of the gaseous components.
| Country | United Kingdom |
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