کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994124 1458030 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Computational/analytical study of the transient hot wire-based thermal conductivity measurements near phase transition
ترجمه فارسی عنوان
مطالعه محاسباتی / تحلیلی از اندازه گیری های هدایت حرارتی بر مبنای سیم کشی گذرا در نزدیکی انتقال فاز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The performance of the commonly-used transient hot wire technique for measuring the thermal conductivity of materials near their liquid-solid transition point is reported in this paper. Adopting a 1-D transient formulation, the computational methodology is discussed in detail and predictions of the wire temperature are compared to the limiting analytical solutions without and with phase change. By varying the initial solid-state temperature of an eicosane sample, six cases which undergo phase change to different extent were studied. The results exhibit a monotonic dependence of the predicted thermal conductivity value on the initial temperature of the solid medium. As the initial temperature of the solid-state sample approaches the melting point, the predicted thermal conductivity value moves toward the value of the liquid eicosane. Recommendations were provided for performing measurements of thermal conductivity using the transient how wire technique involving phase change.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 111, August 2017, Pages 895-907
نویسندگان
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