Category: Transient Plane Source
Author(s): A. Degiovanni, G. Payet, Y. Jannot
Keywords: 3d transfer function, comsol simulation, concrete, convolution, low-density insulating materials, sensitivity analysis, temperature, thermal conductivity, thermal diffusivity, thermal effusivity, three layers experimental device, vacuum
Abstract: Outlines the problems with measuring the thermal conductivity of low-density insulating materials and addresses this by proposing a three layer method for the accurate measurement of thermal conductivity. This method involves a sample being placed between two conducting brass plates (one heated via hot plate) and monitoring the temperatures of these two plates as the experiment progresses. Mathematical equations are derived in order to make an accurate model for thermal conductivity measurement. Sensitivity analysis is used in order to determine how sample shape affects sensitivity to thermophysical measurements. The thermal conductivity of a rigid foam and cellular concrete are measured. Experimental results are compared to those generated from a COMSOL simulation.
Reference: International Journal of Heat and Mass Transfer 52 (2009) 1105-1111
DOI: 10.1016/j.ijheatmasstransfer.2008.09.017