# Guyer-Krumhansl-type heat conduction at room temperature

## TL;DR

This paper demonstrates that heat conduction at room temperature in various materials deviates from Fourier's law and is better described by the Guyer-Krumhansl equation, confirming the relevance of non-equilibrium thermodynamics.

## Contribution

It provides experimental evidence supporting the applicability of the Guyer-Krumhansl model to room temperature heat conduction in macroscopic samples.

## Key findings

- Temperature evolution deviates from Fourier's law
- Guyer-Krumhansl equation accurately models heat conduction
- Supports non-equilibrium thermodynamics for thermomechanical processes

## Abstract

Results of heat pulse experiments in various artificial and natural materials are reported in the paper. The experiments are performed at room temperature with macroscopic samples. It is shown that temperature evolution does not follow the Fourier's law but well explained by the Guyer-Krumhansl equation. The observations confirm the ability of non-equilibrium thermodynamics to formulate universal constitutive relations for thermomechanical processes.