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SR27 Transferência de Calor e Massa |
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Titulo:
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ESTIMATION OF THERMAL CONDUCTIVITY AND VOLUMETRIC HEAT CAPACITY IN TRANSIENT EXPERIMENTS
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Resumo :
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ABSTRACT. THIS PAPER DEALS WITH THE DEVELOPMENT OF AN EXPERIMENTAL SETUP FOR THE ESTIMATION OF THE THERMAL CONDUCTIVITY AND OF THE VOLUMETRIC HEAT CAPACITY OF SOLIDS. IT CONSISTS OF A HEATER SYMMETRICALLY ASSEMBLED BETWEEN TWO PIECES OF THE SPECIMEN WITH UNKNOWN PROPERTIES. TRANSIENT SIMULATED TEMPERATURE MEASUREMENTS TAKEN IN THE SPECIMEN ARE USED IN THE ESTIMATION PROCEDURE BASED ON THE LEVENBERG-MARQUARDT METHOD OF MINIMIZATION OF THE LEAST-SQUARES NORM. AN ANALYSIS OF THE SENSITIVITY COEFFICIENTS AND THE USE OF A D-OPTIMUM CRITERION PERMIT THE OPTIMUM DESIGN OF THE EXPERIMENT.
KEYWORDS: THERMAL CONDUCTIVITY, VOLUMETRIC HEAT CAPACITY, PARAMETER ESTIMATION, LEVENBERG-MARQUARDT
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Autores :
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Oliveira, Alexandre P.
Orlande, Helcio R.B.
Silva, Daniela V.F.M.R.
Souza, Roberto
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Trabalho Completo :
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