Modeling of Suspension Flow in Pipes and Rheometers

Author(s): Nicos S. Martys, Chiara F. Ferraris, William L. George
Paper category: Conference
Book Title: 8th International RILEM Symposium on Self-Compacting Concrete - SCC 2016
Editor: Kamal H. Khayat
ISBN: 978-2-35158-156-8
e-ISBN: 978-2-35158-157-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 183-191
Total Pages: 9
Language: English

Abstract: Measurement and prediction of the flow of suspensions like fresh concrete represents a significant challenge for both the experimentalist and modeler. In this paper, results of a computational study of suspension flow in a pipe and a rheometer design using a four blade vane as an impellor are given. The computational method is based on the Smooth Particle Hydrodynamics approach. Flow fields and the spatial distribution of solid spherical inclusions for the case of pipe flow will be shown as a function of the matrix fluid properties, (including Newtonian, shear thinning and shear thickening), driving force, and volume fraction of particles. A strong effective slip phenomenon is shown for the case of a suspension with a shear thinning fluid matrix. Results will be compared to experiments. Aspects of shear induced migration in a vane rheometer and its effects on rheological measurements will be briefly discussed.

Online publication: 2016
Publication Type: full_text
Public price (Euros): 0.00