Correct Use of the Transient Hot-Wire Technique for Thermal Conductivity Measurements on Solids

Abstract

The paper outlines the essential conditions required to achieve measurements of low uncertainty for the thermal conductivity of solids using the transient hot-wire technique. The paper aims to provide rigorous guidelines for the correct implementation of this technique for solids. For solid materials, the study shows that an uncertainty of as little as ± 1 % is attainable across a broad temperature range by employing the finite element method to solve the pertinent heat transfer equations within the experimental setup. Importantly, the paper discusses the necessary steps to verify that the experimental conditions conform to the theoretical model.