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Related Concept Videos

Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
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States of Water01:23

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Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
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How does an ice block assembly melt?

S Dorbolo1, F Ludewig, N Vandewalle

  • 1FNRS, GRASP, Physics Department, University of Liège, B-4000 Liège, Belgium.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 26, 2012
PubMed
Summary
This summary is machine-generated.

Investigating melting ice blocks in a cylinder revealed sudden volume collapses and large reorganizations. The study highlights confinement effects and low friction as key drivers of melting dynamics.

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Area of Science:

  • Physics
  • Materials Science
  • Granular Physics

Background:

  • Melting dynamics of granular materials under load are complex.
  • Understanding ice block assembly behavior is crucial for various applications.

Purpose of the Study:

  • To investigate the melting process of ice blocks in a confined vertical cylinder under unidirectional load.
  • To analyze the resulting volume changes, structural reorganizations, and governing physical mechanisms.

Main Methods:

  • Simultaneous measurement of total volume and ice volume to determine volume fraction.
  • X-ray tomography imaging to analyze pile structure modifications before and after collapse.
  • Modeling a 2D assembly of disks to represent the wall layer and investigate geometrical frustrations.
  • Numerical simulations to identify governing factors of melting dynamics.

Main Results:

  • Observed sudden breakdowns in total volume despite continuous ice volume decrease, indicating large-scale reorganizations.
  • Maximal volume fraction after reorganization decreased over time.
  • Packing was found to be more ordered along the cylinder walls.
  • Model and simulations suggest geometrical frustrations, confinement effects, and low friction govern the melting and reorganization dynamics.

Conclusions:

  • The melting dynamics of ice blocks in a confined cylinder are significantly influenced by confinement-induced defects and inter-particle friction.
  • The behavior of the ice block assembly, particularly during collapses, is driven by geometrical frustrations and the dynamics of the wall layer.
  • The study provides insights into the complex interplay of melting, packing, and confinement in granular systems.