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

Khaled Hammad; George C. Vradis

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

Khaled Hammad, George C. Vradis

Mechanical and Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	Numerical Methods for Non-Newtonian Fluid Dynamics
Publisher	Publ by ASME
Pages	63-69
Number of pages	7
ISBN (Print)	0791813622
State	Published - 1994
Event	Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) - Lake Tahoe, NV, USA Duration: Jun 19 1994 → Jun 23 1994

Publication series

Name	American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume	179

Other

Other	Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18)
City	Lake Tahoe, NV, USA
Period	6/19/94 → 6/23/94

ASJC Scopus subject areas

General Engineering

Cite this

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hammad, K & Vradis, GC 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. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, vol. 179, Publ by ASME, pp. 63-69, Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18), Lake Tahoe, NV, USA, 6/19/94.

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AB - 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.

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

Abstract

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