Particle transport in a nonuniform flow field: Retardation and clogging

Julio R. Valdes*, J. Carlos Santamarina

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


The authors examine the time delays experienced by migratory particles inside nonuniform flow fields using experimental and numerical methods. Particle trajectories are affected by the particle-fluid density ratio and the flow direction, such that particles may precede or trail the fluid. In flow toward an orifice, the time delay suffered by a single particle is a function of the Froude number Fr and the Archimedes number Ar. When multiple particles are transported radially through a porous medium, time delays manifest through localized annular clogging when 0.05< Ar-1 <0.15 and Fr<6. Gradual particle sedimentation occurs when Ar-1 >1. Applications include filtration and reservoir fluid extraction.

Original languageEnglish (US)
Article number244101
JournalApplied Physics Letters
Issue number24
StatePublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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