ISSN: 0304-128X ISSN: 2233-9558
Copyright © 2024 KICHE. All rights reserved

Articles & Issues

Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.

All issues

농축현탁계의 점도

Viscosity of Concentrated Suspensions of Spheres -Hexagonal Lattice Model-

HWAHAK KONGHAK, April 1975, 13(2), 65-72(8), NONE
downloadDownload PDF

Abstract

복수입자 현탁계에 관한 통계역학적 연구의 일환으로서 dynamical state의 configuration에 대한 model로 hexagonal lattice system을 잡고, 입자의 농도와 계의 점도함수와의 관계를 규명하였다. 이 model system에서 임의의 대표입자는 8개의 최근접 주위입자를 가지며 최고농도는 60.4 %로서 이들은 random packing의 실제 system과 근사하다. 본 model을 사용하여 통계역학적으로 계산된 점도함수는 이미 연구된 simple cubic model에 비하여 실측치들과 보다 좋은 일치를 보였다. 이상의 연구에서 입자의 configuration을 고려한 model이 농축 현탁계의 유동변형특성을 계산하는데 효과적임을 확인하였다.
The viscosity of suspensions of rigid spheres is obtained using the model system of hexagonal lattice configuration by means of statistical mechanics. The number of nearest neighbors of a representative sphere in this arrangement is eight which is quite close to the measured coordination number of about seven to eight for randomdly packed spheres. The maximum attainable concentration of the system is 60.4 percent which is comparable with that obtained for the real system of random packing. The viscosity-concentration relationship calculated from the present model is compared with that of earlier work1) for simple cubic arrangement and found to be in better agreement with the compilations of experimental data of Rutgers and Thomas. It is known from the above analysis that a model dealing with particle configurations is essential to predict the rheological properties of concentrated suspensions.

Keywords

The Korean Institute of Chemical Engineers. F5, 119, Anam-ro, Seongbuk-gu, 233 Spring Street Seoul 02856, South Korea.
Phone No. +82-2-458-3078FAX No. +82-507-804-0669E-mail : kiche@kiche.or.kr

Copyright (C) KICHE.all rights reserved.

- Korean Chemical Engineering Research 상단으로