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Heat conduction in a confined solid strip: response to external strain.
Debasish Chaudhuri1, Abhishek Dhar
1S. N. Bose National Centre for Basic Sciences, Calcutta 700098, India. debc@bose.res.in
Summary
Applying strain to hard disks in a channel causes structural changes that sharply alter heat conduction. A new model explains these heat current changes in solidlike systems.
Area of Science:
- Condensed Matter Physics
- Statistical Mechanics
- Computational Physics
Background:
- Heat conduction is fundamental in materials science.
- Understanding heat transport in confined systems is crucial for nanotechnology.
- Solidlike phases exhibit complex thermal behavior.
Purpose of the Study:
- To investigate heat conduction in a 2D hard-disk system under external strain.
- To analyze the relationship between applied strain and heat current.
- To develop a predictive model for heat transport in deformed solids.
Main Methods:
- Nonequilibrium molecular dynamics simulations were employed.
- A system of hard disks in a narrow two-dimensional channel was simulated.
- External elongational strain was applied to induce deformation and failure.
Main Results:
- Heat current showed sharp changes correlated with structural deformation and failure.
- The applied strain significantly impacted the internal structure and thermal properties.
- A free-volume-type model qualitatively reproduced heat current behavior for small strains.
Conclusions:
- External strain dramatically influences heat conduction in confined hard-disk systems.
- Structural changes are key drivers of abrupt variations in heat current.
- The proposed model offers insights into heat transport under deformation.