孔力学
色散(光学)
拉格朗日相干结构
多孔介质
拉格朗日
机械
材料科学
物理
光学
复合材料
理论物理学
多孔性
涡流
作者
J. Wu,Daniel Lester,M. G. Trefry,Guy Metcalfe
出处
期刊:Physical review fluids
[American Physical Society]
日期:2024-04-09
卷期号:9 (4)
标识
DOI:10.1103/physrevfluids.9.044501
摘要
This study focuses on how Lagrangian coherent structures (LCSs) control solute dispersion in heterogeneous poroelastic media (HPM). We show how interactions between medium compressibility, conductivity heterogeneity, and periodic forcing give rise to complex flows and diverse LCS types (KAM islands, chaotic saddles, etc) that have profound impacts on diffusive solute transport (main image) that do not arise in the steady counterpart (inset). Strongly anomalous transport impacts both spatial moments and residence time distributions and persists at low P\'eclet numbers. This study reveals the complex transport phenomena that can arise in HPM and shows how LCSs govern solute dispersion.
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