A statistical approach to estimate the experimental uncertainty of viscosity data obtained by the oscillating cup technique
A statistical approach to estimate the experimental uncertainty of viscosity data obtained by the oscillating cup technique
复制标题
估计通过振荡杯技术获得的粘度数据的实验不确定性的统计方法
DOI：
10.1016/j.jallcom.2009.02.006
复制
发表时间：
2009
影响因子：
6.2
通讯作者：
W. Hoyer
中科院分区：
文献类型：
--
作者：
S. Gruner;W. Hoyer
高温下金属合金动态粘度的测定是材料设计和表征的关键实验。为此，振荡杯法是最适合和最常用的方法。然而，实验不确定性的关键估计是稀缺的，复杂的比较不同的作者所获得的结果，以及为了描述动态粘度随温度和合金的组成的变化而建立的模型。我们提出了一种统计方法，首先估计的不确定性的实际测量参数的扭转振荡，第二，分析这些错误的传播时，计算的动态粘度。在5-10%的范围内的总体相对不确定度获得纯液态铝，锡和铜进行的选定的实验。这一数字与以前的误差估计吻合得很好。然而，方法是准备参与在实际实验中的动态粘度的通常的数值计算程序，因此能够考虑到与给定的样品的个别条件。
The determination of the dynamic viscosity of metallic alloys at elevated temperatures is a key experiment for materials design and characterisation. To do so, the oscillating cup method is the most suited and commonly applied one. However, critical estimations of the experimental uncertainties are scarce, complicating the comparison of results obtained by different authors as well as with models set up in order to describe the changes of the dynamic viscosity with temperature and the alloy's composition. We present a statistical approach, first to estimate the uncertainties of the actual measured parameters of a torsional oscillation, and second to analyse the propagation of these errors when calculating the dynamic viscosity. Overall relative uncertainties in the range of 5–10% are obtained for selected experiments carried out on pure liquid Al, Sn and Cu. This figure is in good agreement with previous error estimations. However, method is ready to be involved in the usual numeric calculation procedure of the dynamic viscosity in the actual experiment and is thus able to take the individual conditions with a given sample into account.
DOI：
10.1007/bf01600560
发表时间：
1957
期刊：
Zeitschrift für angewandte Mathematik und Physik ZAMP
影响因子：
--
作者：
J. Kestin;G. F. Newell
通讯作者：
G. F. Newell