背景流对注入咸水层的二氧化碳溶解捕获的影响
Impact of background flow on dissolution trapping of carbon dioxide injected into saline aquifers
摘要：
虽然人们对研究溶解驱动的自由对流在地质封存中的作用有很大的兴趣，但强迫对流的贡献在很大程度上被忽视了。这份手稿认为，CO $_2$封存在含盐含水层与自然背景流，并使用理论参数来计算临界背景速度需要建立强制对流制度。支持二维高分辨率数值模拟的理论论据，这表明强制对流在提高溶解的含水层的特点是低瑞利数的重要性。
英文摘要：
While there has been a large interest in studying the role of dissolution-driven free convection in the context of geological sequestration, the contribution of forced convection has been largely ignored. This manuscript considers CO$_2$ sequestration in saline aquifers with natural background flow and uses theoretical arguments to compute the critical background velocity needed to establish the forced convective regime. The theoretical arguments are supported by two dimensional high-resolution numerical simulations which demonstrate the importance of forced convection in enhancing dissolution in aquifers characterised by low Rayleigh numbers.
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