Scientific Results

Virtual Experiments by Pulse Heating Techniques: Cylindrical Tungsten Specimens

Year: 2011

Authors: Bussolino GC., Annino G., Ferrari C., Righini F.

Autors Affiliation: CNR Istituto Nazionale di Ottica, Pisa, Italy; CNR Istituto per i processi Chimico-Fisici, Pisa, Italy; INRIM Istituto Nazionale Ricerca Metrologica, Turin, Italy

Abstract: A bi-dimensional geometrical model was developed and numerically solved considering different cylindrical tungsten specimens, heated to temperatures above 3600 K with current pulses of about (500, 750, and 950) ms duration. A detailed analysis of these virtual experiments indicated large radial temperature differences in all the investigated cases. The range of validity of the long thin rod approximation was verified for various geometries and under different experimental conditions. The developed model may be used to estimate uncertainties due to the use of this approximation and to optimize experimental conditions in real experiments.

Journal/Review: INTERNATIONAL JOURNAL OF THERMOPHYSICS

Volume: 32 (11)      Pages from: 2716  to: 2726

KeyWords: High temperatures; Numerical modeling; Pulse heating; Subsecond experiments; Tungsten
DOI: 10.1007/s10765-011-1098-4

Citations: 1
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English