The evolution of laminar jets of Herschel-Bulkley fluids

Ijaz H. Jafri, George Vradis

Research output: Contribution to journalArticle

Abstract

The steady, incompressible, non-isothermal submerged jet of a non-Newtonian Herschel-Bulkley (yield/power-law) fluid is studied using a numerical solution of the governing boundary layer equations. Emphasis is placed in determining the effects that the governing non-dimensional flow parameters, i.e. the yield number, power-law index, and Prandtl number have on the evolution of the hydrodynamic and thermal characteristics of such jets. Both yield-pseudoplastic and yield-dilatant fluids are studied for planar and axisymmetric geometries. These results show that for fluids exhibiting a yield stress, mixing is much more rapid as compared to that of yield-stress-free fluids. Moreover, the results establish the near independence of the decay of the centerline temperature from the power-law index.

Original languageEnglish (US)
Pages (from-to)3575-3588
Number of pages14
JournalInternational Journal of Heat and Mass Transfer
Volume41
Issue number22
StatePublished - 1998

Fingerprint

laminar jets
Fluids
fluids
Yield stress
Prandtl number
boundary layer equations
Boundary layers
Hydrodynamics
Geometry
hydrodynamics
decay
geometry
Temperature

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

Cite this

The evolution of laminar jets of Herschel-Bulkley fluids. / Jafri, Ijaz H.; Vradis, George.

In: International Journal of Heat and Mass Transfer, Vol. 41, No. 22, 1998, p. 3575-3588.

Research output: Contribution to journalArticle

Jafri, Ijaz H. ; Vradis, George. / The evolution of laminar jets of Herschel-Bulkley fluids. In: International Journal of Heat and Mass Transfer. 1998 ; Vol. 41, No. 22. pp. 3575-3588.
@article{fde61e6c9c5643248fadd5f5d3052e2e,
title = "The evolution of laminar jets of Herschel-Bulkley fluids",
abstract = "The steady, incompressible, non-isothermal submerged jet of a non-Newtonian Herschel-Bulkley (yield/power-law) fluid is studied using a numerical solution of the governing boundary layer equations. Emphasis is placed in determining the effects that the governing non-dimensional flow parameters, i.e. the yield number, power-law index, and Prandtl number have on the evolution of the hydrodynamic and thermal characteristics of such jets. Both yield-pseudoplastic and yield-dilatant fluids are studied for planar and axisymmetric geometries. These results show that for fluids exhibiting a yield stress, mixing is much more rapid as compared to that of yield-stress-free fluids. Moreover, the results establish the near independence of the decay of the centerline temperature from the power-law index.",
author = "Jafri, {Ijaz H.} and George Vradis",
year = "1998",
language = "English (US)",
volume = "41",
pages = "3575--3588",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",
number = "22",

}

TY - JOUR

T1 - The evolution of laminar jets of Herschel-Bulkley fluids

AU - Jafri, Ijaz H.

AU - Vradis, George

PY - 1998

Y1 - 1998

N2 - The steady, incompressible, non-isothermal submerged jet of a non-Newtonian Herschel-Bulkley (yield/power-law) fluid is studied using a numerical solution of the governing boundary layer equations. Emphasis is placed in determining the effects that the governing non-dimensional flow parameters, i.e. the yield number, power-law index, and Prandtl number have on the evolution of the hydrodynamic and thermal characteristics of such jets. Both yield-pseudoplastic and yield-dilatant fluids are studied for planar and axisymmetric geometries. These results show that for fluids exhibiting a yield stress, mixing is much more rapid as compared to that of yield-stress-free fluids. Moreover, the results establish the near independence of the decay of the centerline temperature from the power-law index.

AB - The steady, incompressible, non-isothermal submerged jet of a non-Newtonian Herschel-Bulkley (yield/power-law) fluid is studied using a numerical solution of the governing boundary layer equations. Emphasis is placed in determining the effects that the governing non-dimensional flow parameters, i.e. the yield number, power-law index, and Prandtl number have on the evolution of the hydrodynamic and thermal characteristics of such jets. Both yield-pseudoplastic and yield-dilatant fluids are studied for planar and axisymmetric geometries. These results show that for fluids exhibiting a yield stress, mixing is much more rapid as compared to that of yield-stress-free fluids. Moreover, the results establish the near independence of the decay of the centerline temperature from the power-law index.

UR - http://www.scopus.com/inward/record.url?scp=0032208860&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032208860&partnerID=8YFLogxK

M3 - Article

VL - 41

SP - 3575

EP - 3588

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

IS - 22

ER -