 Transient hot wire method

The Transient Hot Wire (THW) method is a technique used to measure the thermal conductivity of materials, particularly solids and liquids. It is based on the transient response of a thin wire that has an electric current passing through it, which heats up due to electrical resistance. The key features of the THW method include: ### Principles of Operation 1. **Heating the Wire**: A thin wire, typically a metal, is inserted into the material whose thermal conductivity is to be measured.