Full Content is available to subscribers

Subscribe/Learn More  >

CFD Investigation of Developing and Redeveloping Laminar Flow and Heat Transfer Characteristics in Coiled Tube Systems for Constant Wall Temperature Heating and Cooling: Part II — Spiral Configurations

[+] Author Affiliations
Anthony J. Bowman, Hyunjae Park

Marquette University

Paper No. IMECE2006-15572, pp. 733-739; 7 pages
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 1
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4784-5 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME


In this paper developing and redeveloping laminar fluid flow and heat transfer performance in spiral coiled tube heat exchanger systems with specified coil-to-tube radius ratios (5 to 45), spiral pitch and inside-to-outside flow are investigated using appropriate numerical modeling techniques in the CFD package (Fluent v6.2). The CFD models employ variable thermo-physical properties in the analysis of uniform wall temperature heating and cooling of common working fluids such as air and water. The CFD models developed in Part I of this investigation are extended to analyze spiral tube configurations. Appropriate dimensionless variables used to describe the (re)developing hydrodynamic and thermal flow for coiled tube systems are defined and discussed. The spiral configuration is unique in that fully developed flow is not attained for the coil-to-tube radius ratios used in this work. In spiral configurations, the centrifugal effects are not constant as the radius of curvature is not constant. Flows within the spiral flow passages are analyzed as re-developing or re-establishing hydrodynamic and thermal flows. As with the helical flow configuration, it has been shown that in addition to the radius ratio and the Dean and Prandtl numbers, the heat transfer performance also depends upon the interactions (expansion and suppression) between the viscous and thermal boundary layers due to secondary flows caused by the centrifugal forces inherent in coiled tube systems. The predictions of the numerical simulations also showed that the local friction factor and heat transfer performance continuously vary along the length of the tube. The results obtained from this work indicate the limits of application of the friction factor and heat transfer correlations reported in the literature.

Copyright © 2006 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In