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Crossover from Jamming to Clogging Behaviours in Heterogeneous Environments.

H Péter1,2, A Libál1,2, C Reichhardt1

  • 1Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.

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This summary is machine-generated.

Jamming and clogging are distinct phenomena. Researchers observed a transition from clogging to jamming in disk flow through obstacles, differing in dynamics and resulting states.

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Area of Science:

  • Physics
  • Materials Science
  • Fluid Dynamics

Background:

  • Jamming and clogging describe transitions in particulate matter flow, but their distinction remains unclear.
  • Jamming involves a transition from flowing to solid states, while clogging is flow cessation through a bottleneck.
  • Understanding these phenomena is crucial for diverse applications involving granular materials and suspensions.

Purpose of the Study:

  • To investigate the relationship and potential distinctions between jamming and clogging phenomena.
  • To identify the critical factors and transition dynamics governing these behaviors.
  • To characterize the distinct states and processes associated with clogging and jamming.

Main Methods:

  • Simulating disk assemblies moving through a random obstacle array.
  • Analyzing particle dynamics and packing structures at varying densities.
  • Characterizing transitions using concepts from phase transitions and critical phenomena.

Main Results:

  • A clear transition from clogging to jamming behavior was identified as disk density increased.
  • Clogging exhibited characteristics of an absorbing phase transition, leading to heterogeneous, phase-separated states.
  • Jamming occurred rapidly, forming homogeneous, motionless packings with a diverging rigidity length scale.

Conclusions:

  • Jamming and clogging are distinct phenomena with different underlying mechanisms and outcomes.
  • Disk density is a critical parameter controlling the transition between clogging and jamming.
  • The study provides a framework for differentiating these behaviors in particulate flow systems.