Flow of a non-Newtonian Bingham plastic through an axisymmetric sudden contraction: Effects of Reynolds and yield numbers

Khaled Hammad, George C. Vradis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of the governing Reynolds and yield numbers on the steady, incompressible, laminar flow of a non-Newtonian viscoplastic Bingham fluid through an axisymmetric sudden contraction is studied numerically using a finite-differences based scheme. The results demonstrate the significant effect of these two parameters both on the macroscopic and local kinematic properties of the flow field. The existence of a yield stress results in the rapid decrease of the recirculating flow region, which practically disappears at very low yield numbers. The centerline velocity development in the immediate vicinity of the contraction is shown to be independent of the yield number.

Original languageEnglish (US)
Title of host publicationNumerical Methods for Non-Newtonian Fluid Dynamics
PublisherPubl by ASME
Pages63-69
Number of pages7
ISBN (Print)0791813622
StatePublished - 1994
EventProceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) - Lake Tahoe, NV, USA
Duration: Jun 19 1994Jun 23 1994

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume179

Other

OtherProceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18)
CityLake Tahoe, NV, USA
Period6/19/946/23/94

ASJC Scopus subject areas

  • Engineering(all)

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    Hammad, K., & Vradis, G. C. (1994). Flow of a non-Newtonian Bingham plastic through an axisymmetric sudden contraction: Effects of Reynolds and yield numbers. In Numerical Methods for Non-Newtonian Fluid Dynamics (pp. 63-69). (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED; Vol. 179). Publ by ASME.