Shallow flows of generalised Newtonian fluids on an inclined plane

Pritchard, David and Duffy, Brian R. and Wilson, Stephen K. (2015) Shallow flows of generalised Newtonian fluids on an inclined plane. Journal of Engineering Mathematics, 94 (1). pp. 115-133. ISSN 0022-0833

[img]
Preview
 PDF (Pritchard-etal-JEM2014-shallow-flows-generalised-newtonian-fluids)
Pritchard_etal_JEM2014_shallow_flows_generalised_newtonian_fluids.pdf
Accepted Author Manuscript
Download (399kB)| Preview

    Abstract

    We derive a general evolution equation for a shallow layer of a generalised Newtonian fluid undergoing two-dimensional gravity-driven flow on an inclined plane. The flux term appearing in this equation is expressed in terms of an integral involving the prescribed constitutive relation and, crucially, does not require explicit knowledge of the velocity profile of the flow; this allows the equation to be formulated for any generalised Newtonian fluid. In particular, we develop general solutions for travelling waves on a mild slope and for kinematic waves on a moderately steep slope; these results provide simple and accessible models of, for example, the propagation of non-Newtonian mud and debris flows.

    Author(s):Pritchard, David ORCID logoORCID: https://orcid.org/0000-0002-9235-7052, Duffy, Brian R. and Wilson, Stephen K. ORCID logoORCID: https://orcid.org/0000-0001-7841-9643
    Item type:Article
    ID code:48744
    Keywords:non-Newtonian rheology, lubrication flow, free-surface flow, thin film, Mathematics, Mathematics(all)
    Subjects:Science > Mathematics
    Department:Faculty of Science > Mathematics and Statistics
    Depositing user: Pure Administrator
    Date deposited:23 Jun 2014 15:48
    Last modified:14 Feb 2020 00:39
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/48744
    Export data:
    CORE (COnnecting REpositories)