Heat transfer in flows of non-newtonian bingham fluids through axisymmetric sudden expansions and contractions

George Vradis, Khaled J. Hammad

Research output: Contribution to journalArticle

Abstract

The heat transfer phenomena associated with the laminar, constant properties flow of non-Newtonian Bingham fluids over sudden expansions and through contractions in circular pipes are studied by numerically solving the fully elliptic governing continuity, momentum, and energy equations for a wide range of the governing Reynolds, yield, and Prandtl numbers. The influence of the yield number on the thermal field is more pronounced at high Reynolds and Prandtl numbers. In the sudden expansion case this influence takes the form of a localized peak in the Nusselt number distribution downstream of the reattachement point. The magnitude of the peak Nusselt number increases with the Reynolds, yield, and Prandtl numbers. A sharp reduction in the Nusselt number values right before the contraction plane is found to be more significant at high Reynolds and Prandtl numbers.

Original languageEnglish (US)
Pages (from-to)339-353
Number of pages15
JournalNumerical Heat Transfer; Part A: Applications
Volume7
Issue number3
DOIs
StatePublished - 1995

Fingerprint

Bingham Fluid
Non Newtonian flow
Non-Newtonian Fluid
Prandtl number
contraction
Heat Transfer
Contraction
Nusselt number
heat transfer
Heat transfer
expansion
fluids
high Reynolds number
Reynolds number
continuity equation
Momentum
Pipe
momentum
Energy
Range of data

ASJC Scopus subject areas

  • Numerical Analysis
  • Condensed Matter Physics

Cite this

Heat transfer in flows of non-newtonian bingham fluids through axisymmetric sudden expansions and contractions. / Vradis, George; Hammad, Khaled J.

In: Numerical Heat Transfer; Part A: Applications, Vol. 7, No. 3, 1995, p. 339-353.

Research output: Contribution to journalArticle

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