Figure 2.
The diagram shows a vertical stack of materials used in a thermal test. Block two is at the top, followed by a thick copper plate at temperature T2, then a layer of fabric, a thin copper plate at temperature T3, and a glass plate. Below the glass plate is another thick copper plate at temperature T4, resting on block one. The arrangement illustrates how the fabric layer is positioned between copper and glass plates to measure heat transfer through the material.Principle of determining thermal conductivity on the device