Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Journal of Enhanced Heat Transfer
IF: 0.562 5-Year IF: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Print: 1065-5131
ISSN Online: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v8.i6.30
pages 383-395

The Scaling and Correlation of Low Reynolds Number Swirl Flows and Friction Factors in Circular Tubes with Twisted-Tape Inserts

Raj M. Manglik
Thermal-Fluids and Thermal Processing Laboratory, Mechanical and Materials Engineering, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45220, USA
S. Maramraju
Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical, Industrial and Nuclear Engineering, University of Cincinnati, Cincinnati, Ohio, USA
Arthur E. Bergles
Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York; University of Maryland, College Park, Maryland; Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

ABSTRACT

This paper assesses the scaling and correlation of fully developed swirl generated by twisted-tape inserts in laminar circular-tube flows. The tape-induced secondary fluid circulation is shown to be characterized by a helical vortex, which grows and breaks up into a pair of counterrotating vortices with decreasing tape-twist ratio y and/or increasing axial flow Reynolds number Re. The validity of correlating isothermal friction factors in such fully developed, two-vortex-cell laminar flows by the swirl parameter (Sw = Res / √y) proposed in an earlier study (Manglik and Bergles [1993a]) is evaluated. Experimental data and computational simulations reported in the literature for a wide range of laminar flow conditions (43 < Re < 2720) and twist ratios (1.5 ≤ y) of the tape inserts are considered. All data and numerical results are found to be in excellent agreement (within ±10%) with the predictions of the Manglik and Bergles f-correlation. This clearly establishes its generalized design applicability as well as verifies the scaling of tape-induced swirl flows by the parameter Sw.


Articles with similar content:

Experimental and Numerical Investigation of Thermal-Hydraulic Characteristics of a Wavy-Channel Compact Heat Exchanger
International Heat Transfer Conference 12, Vol.52, 2002, issue
Raj M. Manglik, Arun Muley, Joseph B. Borghese, Jaydeep Kundu
THE PERFORMANCES OF SWIRL JET ATOMIZERS AT VERY HIGH LIQUID PRESSURE
ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems, Vol.0, 1994, issue
I. R. Widger, Andrew J. Yule
NATURAL CONVECTION OF POWER-LAW FLUIDS IN RECTANGULAR CROSSSECTIONAL CYLINDRICAL ANNULAR ENCLOSURES WITH DIFFERENTIALLY HEATED VERTICAL WALLS
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2017, issue
Osman Turan, Sahin Yigit, Nilanjan Chakraborty
ON THE MODELING OF LIQUID SPRAYS IMPINGING ON SURFACES
Atomization and Sprays, Vol.8, 1998, issue 6
Chr. Mundo, Martin Sommerfeld, Cameron Tropea
ENHANCED HEAT TRANSFER IN CORRUGATED-PLATE CHANNELS WITH NON-NEWTONIAN POWER-LAW FLUID FLOWS
Journal of Enhanced Heat Transfer, Vol.20, 2013, issue 4
Hossam M. Metwally, Raj M. Manglik