Category: Transient Plane Source
Author(s): Arnaud Alzina, B. Nait-Ali, D. S. Smith, F. Pennec, H. De Baynast, N. Mati-Baouche, N. Tessier-Doyen
Keywords: 3D optical scanner, B B , building materials, discrete element method, finite-element method, hetergeneous materials, insulation, plant material, sunflower pith, Thermal Conductivity
Abstract: This study used a two part process to create a system that would predict the thermal conductivity of insulated building materials containing plant materials. A finite-discrete element method was used to predict the thermal conductivity of a packed bed of sunflower pith, while a discrete element method was used to predict how aggregates would fill a volume element. These were used to predict the thermal conductivity of the heterogeneous volume. An instrument was used to determine the thermal conductivity of sunflower stems and a container packed with pith in order to provide data to facilitate the creation of the models. Initial results showed a discrepancy between the experimental and predicted results, as the model had not taken radiative heat transfer into account.
Reference: International Journal of Heat and Mass Transfer 60 (2013) 274–283