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Discussion

Discussions: (1) “On the Axisymmetric Turbulent Boundary Layer Growth Along Long Thin Circular Cylinders,” (Jordan, S. A., 2014, ASME J. Fluids Eng., 136(5), p. 051202) and (2) “Understanding Tow Tank Measurements of Total Drag for Long Thin Circular Cylinders,” (Jordan, S. A., 2014, ASME J. Fluids Eng., 136(3), p. 031205)

[+] Author and Article Information
Noor Afzal

Embassy Hotel,
Rasal Ganj,
Aligarh 202001, India
e-mail: noor.afzal@yahoo.com

Abu Seena

Samsung C&T Headquarters,
Seocho-2-dong, SeoCho-Gu,
Seoul 137-956, Korea
e-mail: abu.seena15@gmail.com

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received March 28, 2014; final manuscript received July 5, 2014; published online January 6, 2015. Assoc. Editor: Sharath S. Girimaji.

J. Fluids Eng 137(3), 035501 (Mar 01, 2015) (3 pages) Paper No: FE-14-1156; doi: 10.1115/1.4029329 History: Received March 28, 2014; Revised July 05, 2014; Online January 06, 2015

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References

Figures

Grahic Jump Location
Fig. 1

Comparisons between experimental measurements and prediction (1) of Afzal and Singh [3]—δ/a=0.045(x/a)0.746 for Rea=14,200 and prediction (6) of Jordan [1]—δ/a=0.259(x/a)0.510 for same value Rea=14,200, for axial growth of turbulent boundary layer thickness along a long circular cylinder. The power index 0.510 in Ref. [1] is nearly a value of boundary layer thickness δ~x0.5+… along a circular cylinder due to laminar flow [7] rather than turbulent flow [1,6].

Grahic Jump Location
Fig. 2

Comparisons of experimental measurements (except δ/a>1 data of Refs. [5] and [15]) with prediction (1) of Afzal and Singh [3]—δ/a=0.045(x/a)0.746 for Rea=14,200, for axial growth of turbulent boundary layer thickness along a long circular cylinder

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