Drag-reducing solutions exhibit simultaneous friction and heat transfer reductions, yet it has been widely believed that there is no direct coupling between the two. In this work, we have conducted a study to re-examine this issue, using measurements of friction and heat transfer over a wide range of flow conditions from onset to asymptotic, various pipe diameters, and several polymer and surfactant solutions. Contrary to some earlier suggestions, our tests show that no decoupling of the momentum and heat transfer mechanisms was seen at the onset of drag reduction, nor upon departure from the asymptotes, but rather that the friction and heat transfer reductions change simultaneously in those regions. For asymptotic surfactant and polymer solutions, the ratio of heat transfer and drag reductions was seen to be constant over a large range of Reynolds numbers, if modified definitions of the reduction parameters are used. In the nonasymptotic region, however, the ratio of heat transfer to drag reductions is higher and is a function of the reduction level, but is approximately the same for polymer and surfactant solutions. This variation is consistent with the concept of a direct coupling through a nonunity constant Prt, as also suggested by our local measurements of temperature and velocity profiles. We also saw that our diameter scaling technique for friction applies equally well to heat transfer. These findings allow us to predict directly the heat transfer from friction measurements or vice versa for these drag-reducing fluids, and also suggest that a strong coupling exists between the heat and momentum transfer mechanisms.
Skip Nav Destination
Article navigation
Research Papers
Coupling Between Heat and Momentum Transfer Mechanisms for Drag-Reducing Polymer and Surfactant Solutions
G. Aguilar,
G. Aguilar
Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106
Search for other works by this author on:
K. Gasljevic,
K. Gasljevic
Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106
Search for other works by this author on:
E. F. Matthys
E. F. Matthys
Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106
Search for other works by this author on:
G. Aguilar
Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106
K. Gasljevic
Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106
E. F. Matthys
Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106
J. Heat Transfer. Nov 1999, 121(4): 796-802 (7 pages)
Published Online: November 1, 1999
Article history
Received:
March 30, 1998
Revised:
May 5, 1999
Online:
December 5, 2007
Citation
Aguilar, G., Gasljevic, K., and Matthys, E. F. (November 1, 1999). "Coupling Between Heat and Momentum Transfer Mechanisms for Drag-Reducing Polymer and Surfactant Solutions." ASME. J. Heat Transfer. November 1999; 121(4): 796–802. https://doi.org/10.1115/1.2826068
Download citation file:
Get Email Alerts
Cited By
Related Articles
Drag
and Heat Transfer Reduction Phenomena of Drag-Reducing Surfactant Solutions in Straight and Helical
Pipes
J. Heat Transfer (August,2006)
Heat Transfer Enhancement to the Drag-Reducing Flow of Surfactant Solution in Two-Dimensional Channel With Mesh-Screen Inserts at the Inlet
J. Heat Transfer (August,2001)
Heat Transfer in a Surfactant Drag-Reducing Solution—A Comparison With Predictions for Laminar Flow
J. Heat Transfer (June,2006)
Drag Reduction in Turbulent Flow With Polymer Additives
J. Fluids Eng (May,2009)
Related Proceedings Papers
Related Chapters
Extended Surfaces
Thermal Management of Microelectronic Equipment, Second Edition
Extended Surfaces
Thermal Management of Microelectronic Equipment
Natural Gas Transmission
Pipeline Design & Construction: A Practical Approach, Third Edition