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Transcellular transport of solutes is the movement of substances like monosaccharides and amino acids through polarized cells. This transport mechanism is primarily seen in epithelial and endothelial cells aided by membrane transport proteins such as channels and transporters. The tight junctions between these cells confine the membrane proteins to the two sides of the cell. The epithelial cells have distinct apical and basolateral domains. In contrast, the endothelial cells show the luminal...
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The Diffusion of Passive Tracers in Laminar Shear Flow
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Subsurface solute transport with one-, two-, and three-dimensional arbitrary shape sources.

Kewei Chen1, Hongbin Zhan1, Renjie Zhou1

  • 1Department of Geology and Geophysics, Texas A&M University, College Station, TX 77843-3115, USA.

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Summary

This study presents new solutions for tracking contaminant transport in aquifers, considering various source shapes and locations. Source geometry significantly impacts contaminant spread, offering insights for environmental remediation and source identification.

Keywords:
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Area of Science:

  • Environmental Science
  • Hydrogeology
  • Geochemistry

Background:

  • Contaminant transport in geological media is crucial for environmental protection.
  • Accurate modeling of solute transport requires consideration of diverse source geometries and aquifer conditions.

Purpose of the Study:

  • To develop general solutions for solute transport in saturated, homogeneous aquifers with arbitrary source geometries.
  • To provide tools for investigating contaminant transport problems and aid in source zone identification.

Main Methods:

  • Developed a general method for solute transport solutions in aquifers.
  • Considered various source geometries: line, patch, circular, and volumetric.
  • Simulated sources on aquifer boundaries (LNAPLs/DNAPLs) and within the aquifer.

Main Results:

  • New solutions were validated against benchmark solutions, demonstrating robustness and accuracy.
  • Source geometry, shape, and orientation significantly influence concentration profiles.
  • Inclined line sources show different concentration expansions compared to horizontal sources.

Conclusions:

  • The developed solutions are valuable for contaminant transport studies and inverse problems.
  • Source geometry is a critical factor affecting contaminant plume behavior.
  • Understanding source geometry aids in predicting contaminant fate and transport.