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Influence of rheology on laminar heat transfer to viscoelastic fluids in a rectangular channel

Journal Article · · Industrial and Engineering Chemistry Research; (United States)
DOI:https://doi.org/10.1021/ie00003a012· OSTI ID:5320223
;  [1]
  1. Energy Resources Center, Univ. of Illinois at Chicago, Chicago, IL (US)
+ Show Author Affiliations

Experimental studies of the laminar pressure drop and heat-transfer behavior of two types of aqueous polymer solutions were carried out in a 2:1 rectangular channel. The fluids studied were 1000 wppm of neutralized Carbopol 934 in deionized water and 1000 wppm of Separan AP-273 in tap water. Three difference thermal boundary conditions were studied. The experimental friction factors for the two polymer solutions agree with the value predicted for a purely viscous power law fluid. The measured Nusselt values for the two polymer solutions were considerably higher than the corresponding values for a power law fluid and higher than the experimental values for water. In this paper it is postulated that these high heat-transfer values are the result of secondary flows which arise from normal stress differences imposed on the boundaries of viscoelastic fluids in laminar flow through noncircular geometries. In addition, it is hypothesized that under laminar flow conditions the low frequency oscillatory behavior determines the relative elasticity, which in turn influences the heat-transfer performance of such fluids.

OSTI ID:
5320223
Journal Information:
Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 31:3; ISSN 0888-5885; ISSN IECRE
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AQUEOUS SOLUTIONS
BOUNDARY CONDITIONS
CONFIGURATION
DATA
DISPERSIONS
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUID FLOW
HEAT TRANSFER
INFORMATION
LAMINAR FLOW
MIXTURES
NUMERICAL DATA
NUSSELT NUMBER
PHYSICAL PROPERTIES
POLYMERS
PRESSURE DROP
RECTANGULAR CONFIGURATION
RHEOLOGY
SOLUTIONS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
VISCOSITY