Fluids with Transverse Isotropy as Models for Electrorheological Fluids

• Published in: Zeitschrift für angewandte Mathematik und Mechanik Vol. 78; no. 2; pp. 97 - 107
• Main Authors: Brunn, P.O., Abu-Jdayil, Basim
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.02.1998; WILEY‐VCH Verlag; Wiley-VCH
• Subjects: Cross-disciplinary physics: materials science; rheology; Electro- and magnetorheological fluids; Exact sciences and technology; Fluid dynamics; Fundamental areas of phenomenology (including applications); Material types; Non-newtonian fluid flows; Physics; Rheology; Normal stress; Electric field effects; Shear stress; Fluid models; Particle suspension; Yield stress; Rheological properties
• ISSN: 0044-2267; 1521-4001
• DOI: 10.1002/(SICI)1521-4001(199802)78:2<97::AID-ZAMM97>3.0.CO;2-F

In electrorheological fluids (ER‐fluids) fibers are formed upon application of an electric field E. This renders the fluid transversely isotropic. Studying transverse isotropy from a purely phenomenological point of view in its simplest form reveals that yield stresses have to be reckoned with, be they shear stresses or normal stresses. For ER‐fluids yield shear stresses are well documented but yield normal stresses have thus far received no attention.