title: Effect of anisotropy on viscous fingering patterns of polymer solutions in linear Hele-Shaw cells.
abstract: Viscous fingering patterns of hydroxypropyl methyl cellulose (HPMC) solutions were investigated by forcing air in linear geometry isotropic and anisotropic Hele-Shaw cells as functions of HPMC concentration and injection pressure of air. The resulting patterns depended on the HPMC concentration and the cell anisotropy. The characteristic quantities of pattern growth, such as the finger velocity and the finger width, were evaluated. The finger velocity in the anisotropic linear cell was faster than that in the isotropic one, and the finger velocity and the finger width were well correlated with the pattern morphological changes. (c) 1999 American Institute of Physics.
authors.affiliation: Department of Chemistry for Materials, Faculty of Engineering, Mie University, 1515 Kamihama, Tsu, Mie 514-8507, Japan.
authors.forename: Masami
authors.initials: M
authors.lastname: Kawaguchi
authors.forename: Kohkichi
authors.initials: K
authors.lastname: Shimomoto
authors.forename: Atushi
authors.initials: A
authors.lastname: Shibata
authors.forename: Tadaya
authors.initials: T
authors.lastname: Kato