Anomalous cooling and Mpemba effect in an oscillatory inductor-resistor-capacitor thermoelectric network and its inverse
Zhaochen Wang , Jinming He , Hyejeong Kim , Wonjoon Choi , Run Hu
Thermo-X ›› 2026, Vol. 2 ›› Issue (2) : 202609
Anomalous cooling or heating implies attractive underlying thermal physics, and the Mpemba effect and its inverse are typical examples. Most existing explanations for such phenomena are based on microscopic Markovian models that quantify relaxation using distance measures such as total variation distance or Kullback-Leibler divergence. Here, we propose a macroscopic network system to observe and analyze the Mpemba effect and its inverse by connecting a thermoelectric module with a body and a reservoir at different initial temperatures. Normal cooling and anomalous cooling can be switched in such a setup, and oscillatory behaviors of temperature, current, and heat flow are found to be the key for achieving the Mpemba effect and its inverse. With an unambiguous definition of the criteria, the occurrence domain of the Mpemba effect is sketched in terms of initial temperature, thermoelectric Figure-of-Merit, and the inductance. This work provides a macroscopic network system to understand the Mpemba effect, and offers a more flexible and dynamic way for thermal management and energy conversion.
Mpemba effect / anomalous cooling / inductor-resistor-capacitor networks
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