Fractures play an important role as flow paths in porous media. When an undersaturated reactive fluid is flowing in a fracture, the dissolution process will alter the flow paths locally. Dissolution patterns grow slowly, but they may lead to a dramatic reorganization of the flow. Here, we study dissolution in a radial geometry, which is relevant for a number of practical applications, e.g., the acidization of oil reservoirs. Different dissolution patterns are presented in a phase diagram with the Péclet and Damköhler numbers as parameters. We also analyze quantitatively the density of wormholes and the relation between the aperture roughness and the ramified patterns.

裂缝在多孔介质中作为流路扮演着重要角色。当不饱和的反应流体在裂缝中流动时，溶解过程将局部改变流动路径。溶出度模式增长缓慢，但它们可能导致流动的剧烈重组。在这里，我们研究径向几何形状中的溶出，这与许多实际应用（例如储油层的酸化）有关。在相图中以Péclet和Damköhler数作为参数显示了不同的溶出模式。我们还定量分析了虫洞的密度以及孔径粗糙度与分枝图案之间的关系。