Solving the inverse problem of capillary viscometry by Tikhonov regularisation

被引:15
作者
Nguyen, YT [1 ]
Vu, TD [1 ]
Wong, HK [1 ]
Yeow, YL [1 ]
机构
[1] Univ Melbourne, Dept Chem Engn, Parkville, Vic 3052, Australia
关键词
capillary viscometry; inverse problem; Tikhonov regularisation; integral equation;
D O I
10.1016/S0377-0257(99)00057-9
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The problem of converting the experimental data generated by a capillary viscometer into a viscosity versus shear rate plot is formulated as a linear Volterra integral equation of the first kind. A method based on Tikhonov regularisation is applied to solve this ill-posed inverse problem. The performance of the method was assessed by applying it to a set of synthetic data where the noise level can be artificially varied. It has also been tested on a set of real data for a commercial HDPE. In all the cases investigated Tikhonov regularisation proved to be a simple and yet reliable way for dealing with the inverse problem of capillary viscometry. (C)1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:103 / 116
页数:14
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