کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1563405 999609 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A numerical solution based parameter estimation method for flash thermal diffusivity measurements
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
A numerical solution based parameter estimation method for flash thermal diffusivity measurements
چکیده انگلیسی

A data reduction method based on numerical solutions of the heat conduction equation has been developed for obtaining thermal diffusivity values from thermal flash measurements. Using the new method, the computed evolution in temperature is fitted to the measured temperature evolution instead of using the t1/2 point alone, as is done in many other analyzes. The numerical solutions used are based on the finite-difference technique applied to the heat conduction equation including all the boundary conditions. A nonlinear least-squares regression technique is used to estimate simultaneously the thermal diffusivity, the heat transfer coefficient and the absorbed energy. Also, the effect of a finite pulse-width can be corrected without knowing the exact shape of the heat pulse.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 45, Issue 2, April 2009, Pages 342–348
نویسندگان
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