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Updated: Apr 16, 2026
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
Published on: May 2, 2016
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Anomalous law of cooling.
Luciano C Lapas1, Rogelma M S Ferreira2, J Miguel Rubí3
1Universidade Federal da Integração Latino-Americana, Caixa Postal 2067, 85867-970 Foz do Iguaçu, Paraná, Brazil.
The Journal of Chemical Physics
|March 16, 2015
Summary
This study explores temperature relaxation in systems with non-Markovian thermal reservoirs. Anomalous cooling, including temperature oscillations, was observed, while entropy consistently increased, upholding thermodynamic laws.
Area of Science:
- Thermodynamics
- Statistical Mechanics
- Non-Markovian Processes
Background:
- Understanding temperature relaxation is crucial for thermal systems.
- Non-Markovian processes introduce memory effects, deviating from standard models.
- Langevin equations describe system dynamics influenced by random forces.
Purpose of the Study:
- To analyze temperature relaxation in systems coupled to a non-Markovian thermal reservoir.
- To investigate the influence of memory functions on cooling dynamics.
- To verify thermodynamic principles during anomalous cooling.
Main Methods:
- Utilized a generalized Langevin equation to model the system.
- Analyzed temperature decay and velocity autocorrelation.
- Characterized the memory function of the thermal reservoir.
Main Results:
- Demonstrated Newton's law of cooling with memory-dependent relaxation time.
- Observed anomalous cooling behavior, including temperature oscillations.
- Confirmed positive entropy variation, consistent with the second law of thermodynamics.
Conclusions:
- The study provides insights into non-Markovian thermal dynamics.
- Anomalous cooling phenomena can occur without violating fundamental thermodynamic laws.
- Memory effects significantly influence temperature relaxation processes.
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