A numerical study of the similarity of fully developed turbulent flows in orthogonally rotating square ducts and stationary curved square ducts
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 1 May 2002
Abstract
A numerical study of a quantitative analogy of fully developed turbulent flow in a straight square duct rotating about an axis perpendicular to that of the duct and a stationary curved duct of square cross‐section was carried out. In order to compare the two flows, the dimensionless parameters KTR=Re1/4/√Ro and the Rossby number, Ro=wm/Ωdh, in the rotating straight duct flow corresponded to KTC=Re1/4/√λ and the curvature ratio, λ=R/dh, in the stationary curved duct flow, so that they had the same dynamical meaning as those parameters for fully developed laminar flow. For the large values of Ro or λ, the flow field satisfied the “asymptotic invariance property”; there were strong quantitative similarities between the two flows, such as in the flow patterns and friction factors for the same values of KTR and KTC. Based on these similarities, it is possible to predict the flow characteristics in rotating ducts by considering the flow in stationary curved ducts, and vice versa.
Keywords
Citation
Hee Lee, G. and Hyun Baek, J. (2002), "A numerical study of the similarity of fully developed turbulent flows in orthogonally rotating square ducts and stationary curved square ducts", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 12 No. 3, pp. 241-257. https://doi.org/10.1108/09615530210422901
Publisher
:MCB UP Ltd
Copyright © 2002, MCB UP Limited