Premium
Flow of dilatant (shear‐thickening) fluids
Author(s) -
Griskey Richard G.,
Green Richard G.
Publication year - 1971
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690170341
Subject(s) - dilatant , laminar flow , reynolds number , mechanics , shear thinning , rheology , newtonian fluid , viscometer , non newtonian fluid , thermodynamics , materials science , viscosity , chemistry , geotechnical engineering , geology , turbulence , physics
Abstract The conduit laminar flow of dilatant (shear‐thickening) fluids was investigated. It was found that such flow agreed with the Metzner‐Reed (friction factor‐modified Reynolds number) correlation previously verified only for pseudoplastic fluids. The agreement was found to hold even for cases where the flow behavior index was 2.0 or greater, which caused the velocity term V in the modified Reynolds number D n ′ V 2− n ′ / g c 8 n −1 K ′ to be raised to the zero or a negative power. It was also demonstrated that conduit laminar flow for dilatant (shear‐thickening) fluids could be described solely with the Metzner‐Reed correlation and rheological data taken with a small‐scale laboratory viscometer. Studies of flow through fittings (90‐deg. elbows, globe valves, and couplings) showed a definite effect for non‐Newtonian fluids contrary to previous reports for pseudoplastics which indicated essentially Newtonian behavior.