Feasibility study and optimal design of an experimental bench for identification of liquids thermal diffusivity

Laetitia Perez (1) , Laurent Autrique (2)

1 LTN - Laboratoire de thermocinétique [Nantes]
2 LISA - Laboratoire d'Ingéniérie des Systèmes Automatisés

Expertise of innovative materials by nondestructive techniques is a key goal in process engineering development. In this context, if identification of thermal diffusivity of liquid is a crucial requirement to develop a reliable mathematical model of knowledge, it is essential to propose a complete and valid methodology. Based on the analysis of thermal wave propagation (generated by a periodic excitation), an experimentation is devel- oped in order to avoid the implementation of a pyroelectric sensor required in usual photopyroelectric techniques. The proposed approach is investigated in a trilayer system. Theoretical aspects of the identification of thermal parameters in the frequency domain are presented. A feasibility study is discussed in order to justify this approach for liquids. A sensitivity analysis is implemented in a particular case to provide an optimal experimental bench. Finally, experimental results for several liquids are presented and discussed

Domaines: Sciences de l'ingénieur [physics]

Laetitia Perez, Laurent Autrique. Feasibility study and optimal design of an experimental bench for identification of liquids thermal diffusivity. IEEE Transactions on Instrumentation and Measurement, 2012, 61 (10), pp.2739-2748. ⟨hal-00846246⟩