The effect of the shear rate-dependent thermal conductivity of non-newtonian fluids on the heat transfer in a pipe flow

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13 Citations (Scopus)

Abstract

The present study investigates the effect of the shear rate-dependent thermal conductivity of non-Newtonian fluids on the heat transfer enhancement in a pipe flow. The constant heat flux as thermal boundary condition was adopted in the thermally developed region. The present analytical results show the heat transfer enhancement over those of a shear rate-independent thermal conductivity fluid. The heat transfer coefficient ratio (h/ho) linearly increase with the non-dimensional average velocity difference which is the product of the shear rate-dependence of the thermal conductivity and wall-shear rate.

Original languageEnglish
Pages (from-to)665-678
Number of pages14
JournalInternational Communications in Heat and Mass Transfer
Volume23
Issue number5
DOIs
Publication statusPublished - 1996 Sep 1
Externally publishedYes

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pipe flow
Pipe flow
Shear deformation
Thermal conductivity
thermal conductivity
heat transfer
shear
Heat transfer
Fluids
fluids
augmentation
heat transfer coefficients
Heat transfer coefficients
Heat flux
heat flux
Boundary conditions
boundary conditions
products

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

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AB - The present study investigates the effect of the shear rate-dependent thermal conductivity of non-Newtonian fluids on the heat transfer enhancement in a pipe flow. The constant heat flux as thermal boundary condition was adopted in the thermally developed region. The present analytical results show the heat transfer enhancement over those of a shear rate-independent thermal conductivity fluid. The heat transfer coefficient ratio (h/ho) linearly increase with the non-dimensional average velocity difference which is the product of the shear rate-dependence of the thermal conductivity and wall-shear rate.

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