1. Date of download: 12/20/2017
Copyright © ASME. All rights reserved.
From: 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 ) 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 )
J. Fluids Eng. 2015;137(3): doi: /
Figure Legend:
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 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].