A NEW METHOD FOR THERMAL-DIFFUSIVITY AND THERMAL-CONDUCTIVITY EVALUATION FROM TRANSIENT HOT-STRIP MEASUREMENTS

被引：7
|
作者：
SONG, YW
GROSS, U
HAHNE, E
机构：
[1] Institut für Thermodynamik und Wärmetechnik, Universität Stuttgart Pfaffenwaldring 6
来源：
FLUID PHASE EQUILIBRIA | 1993年 / 88卷 / pt 5期
关键词：
TRANSIENT MEASURING TECHNIQUE; HOT-STRIP METHOD; THERMAL CONDUCTIVITY; THERMAL DIFFUSIVITY; POROUS MEDIUM;
D O I：
10.1016/0378-3812(93)87119-L
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The transient hot-strip method is a technique for the simultaneous measurement of thermal conductivity, thermal diffusivity and volumetric heat capacity. The basic idea of the method is similar to that of the transient hot-wire technique. A short-time quadratic approximation is available for the temperature rise of the electrically heated strip. However the information recorded in the short-time range is not sufficient for the properties evaluation in case of granular materials. In the present contribution a new technique is proposed for data evaluation within the whole time domain. As an example the thermal conductivity and diffusivity of some granular materials, quartz sand, Mg-powder and LaNi4.7Al0.3-powder, are determined.
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页码：291 / 302
页数：12
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