Axisymmetric gravity currents in anisotropic porous media
Axisymmetric gravity currents in anisotropic porous media
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各向异性多孔介质中的轴对称重力流
DOI:
10.1017/jfm.2022.922
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发表时间:
2022
影响因子:
3.7
通讯作者:
Benham G
中科院分区:
文献类型:
--
作者:
Benham G
We explore the motion of an axisymmetric gravity current in an anisotropic porous medium in which the horizontal permeability is larger than the vertical permeability. It is well known that the classical axisymmetric gravity current supplied by a constant point source of fluid has an unphysical singularity near the origin. We address this by considering a pressure-dominated region near the origin which allows for vertical flow from the source, such that the current remains of finite depth, whilst beyond this region the flow is gravity dominated. At early times the inner pressure-driven region controls the spreading of the current, but at late times the inner region occupies a progressively smaller fraction of the current such that the radius increases as migration through permeable aquifers, as occurs in the context of carbon capture and storage.
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