Laminar tube flow of sieved beef-cattle manure slurries

Abstract

The rheological properties of beef-cattle manure slurries were studied using a tube viscometer. The previously proposed rheological model (Che, 1986) is used to describe the relationship between the shear stress and shear rate at the tube wall. The results are compared with those obtained with a rotational viscometer. A modified Reynolds number is defined and used to relate to the friction loss of the laminar flow in the tube. The Reynolds numbers where the laminar flow region terminated are also discussed.