A modified Angstrom’s method for the measurement of thermal diffusivity in solid materials is presented, aimed at overcoming the limits of ordinary techniques with one-side measurements. The method requires a periodic thermal input to be supplied to the specimen, alternating heating and cooling stages. The thermal diffusivity is estimated by monitoring the temperature oscillations on the free surface of the specimen.The conditions at which a real three-dimensional test-system can be studied by means of a one-dimensional thermal model are investigated. Algorithms to estimate the thermal diffusivity are determined analytically and verified by numerical simulation. The method is finally validated by experimental measurements.
Theoretical, numerical and experimental investigation of a one-side measurement technique for thermal diffusivity / Muscio, Alberto; Corticelli, Mauro Alessandro; Tartarini, Paolo. - STAMPA. - 4020:(2000), pp. 143-151. (Intervento presentato al convegno Thermosense XXII tenutosi a Orlando, FL, USA, nel 25-27 Aprile 2000) [10.1117/12.381545].
Theoretical, numerical and experimental investigation of a one-side measurement technique for thermal diffusivity
MUSCIO, Alberto;CORTICELLI, Mauro Alessandro;TARTARINI, Paolo
2000
Abstract
A modified Angstrom’s method for the measurement of thermal diffusivity in solid materials is presented, aimed at overcoming the limits of ordinary techniques with one-side measurements. The method requires a periodic thermal input to be supplied to the specimen, alternating heating and cooling stages. The thermal diffusivity is estimated by monitoring the temperature oscillations on the free surface of the specimen.The conditions at which a real three-dimensional test-system can be studied by means of a one-dimensional thermal model are investigated. Algorithms to estimate the thermal diffusivity are determined analytically and verified by numerical simulation. The method is finally validated by experimental measurements.
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