measurement was developed. Its novelty is that harmonic thermal waves with mean value equal to the ambient temperature are induced in the specimen by a purposely developed source. This allows estimating the diffusivity by relatively simple processing of surface-temperature data.The estimate is based on a mathematical model, in which the unknown coefficient of surface heat transfer is assumed to be uniform and constant. The coefficient can thus be eliminated by combining information from amplitude decay and phase velocity of the thermal waves.This work is aimed at verifying the assumption of uniform and constant heat transfer coefficient. A parametric analysis is performed by CFD simulation of the test system.
CFD ananlysys onf the impact of convection in a new modeification of the Ångstroem’s method / Levoni, Paolo; Muscio, Alberto; Corticelli, Mauro Alessandro; Barozzi, Giovanni Sebastiano. - STAMPA. - (2004), pp. 29-44. (Intervento presentato al convegno X Convegno AIPT - Associazione Italiana Proprietà Termofisiche tenutosi a Torino nel 24 Settembre 2004).