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  3. Parameters Driving Anomalous Transport In Colloids: Dimensional Analysis.
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  3. Parameters Driving Anomalous Transport In Colloids: Dimensional Analysis.

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Parameters Driving Anomalous Transport in Colloids: Dimensional Analysis.

Bashar M Al-Zghoul1, William P Johnson2, Luis Ullauri2

  • 1Department of Civil and Environmental Engineering and Earth Science, University of Notre Dame, Notre Dame, Indiana 46556, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|July 25, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Surface charge heterogeneity significantly impacts colloid attachment efficiency (α) in porous media. A specific dimensionless group, Hr, dramatically influences α, driving transitions in colloid retention profiles.

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Area of Science:

  • Colloid and Surface Science
  • Porous Media Transport
  • Environmental Engineering

Background:

  • Anomalous colloid transport exhibits multiexponential and nonmonotonic retention profiles.
  • Understanding colloid attachment efficiency (α) is crucial for predicting transport behavior.

Purpose of the Study:

  • To conduct a dimensional analysis of colloid transport equations.
  • To identify dimensionless groups governing colloid attachment efficiency (α).

Main Methods:

  • Dimensional analysis of governing equations.
  • Pore-assembly colloid trajectory simulations.
  • Categorization of dimensionless groups into hydrodynamic, DLVO, and surface charge heterogeneity.

Main Results:

  • Fifteen dimensionless groups govern colloid transport.
  • Surface charge heterogeneity groups dramatically influence α.
  • The Hr group significantly impacts α between 0.6 < Hr < 2.

Conclusions:

  • Surface charge heterogeneity is a dominant factor in colloid attachment.
  • Variations in Hr drive changes in α and retention profiles.
  • This work clarifies mechanisms behind anomalous colloid transport.