Particle transport during asymmetric net-zero cyclic fluid flow: Flow in tubes and radial flow in fractures

Ahmed Hafez*, J. Carlos Santamarina

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Cyclic fluid flow enhances transport in porous media. We study particle transport during asymmetric net-zero cyclic fluid flow where the fluid injection rate is higher than the withdrawal rate. Inside a tube, the threshold fluid velocity required to mobilize a particle depends on the relative particle size: larger particles obstruct flow more effectively than small particles and require a smaller velocity to be transported. Then, flow rates can be selected so particles move forward during the injection phase and remain stationary during withdrawal. Similarly, asymmetric cyclic fluid flow transports particles radially along fractures despite the net-zero fluid flow. The flow velocity decreases away from the injection point and particles migrate to a characteristic “terminal radial distance”. Unlike tube flow, a grain has a diminishing obstructing effect on the radial flow field, and the threshold flow rate required to mobilize grains increases with increasing particle size during radial flow.

Original languageEnglish (US)
Article number119306
JournalPowder Technology
Volume434
DOIs
StatePublished - Feb 1 2024

Keywords

  • Cyclic fluid flow
  • Fines migration
  • Particle-laden fluid flow
  • Proppants

ASJC Scopus subject areas

  • General Chemical Engineering

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