A dimensional analysis which is based on the scaling of the two-dimensional Navier–Stokes equations is presented for correlating bulk flow characteristics arising from a variety of initial conditions. The analysis yields a functional relationship between the characteristic variable of the flow region and the Reynolds number for each of the two independent flow regimes, laminar and turbulent. A linear relationship is realized for the laminar regime, while a nonlinear relationship is realized for the turbulent regime. Both relationships incorporate mass-flow profile characteristics to capture the effects of initial conditions (mean flow and turbulence) on the variation of the characteristic variable. The union of these two independent relationships is formed leveraging the concept of flow intermittency to yield a generic functional relationship that incorporates transitional flow effects and fully encompasses solutions spanning the laminar to turbulent flow regimes. Empirical models to several common flows are formed to demonstrate the engineering potential of the proposed functional relationship.
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September 2017
Research-Article
A Functional Relationship for Modeling Laminar to Turbulent Flow Transitions
George Papadopoulos
George Papadopoulos
Fellow ASME
Innoveering, LLC,
100 Remington Boulevard,
Ronkonkoma, NY 11779
e-mail: George.Papadopoulos@innoveering.net
Innoveering, LLC,
100 Remington Boulevard,
Ronkonkoma, NY 11779
e-mail: George.Papadopoulos@innoveering.net
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George Papadopoulos
Fellow ASME
Innoveering, LLC,
100 Remington Boulevard,
Ronkonkoma, NY 11779
e-mail: George.Papadopoulos@innoveering.net
Innoveering, LLC,
100 Remington Boulevard,
Ronkonkoma, NY 11779
e-mail: George.Papadopoulos@innoveering.net
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 30, 2015; final manuscript received March 12, 2017; published online June 20, 2017. Assoc. Editor: D. Keith Walters.
J. Fluids Eng. Sep 2017, 139(9): 091202 (10 pages)
Published Online: June 20, 2017
Article history
Received:
August 30, 2015
Revised:
March 12, 2017
Citation
Papadopoulos, G. (June 20, 2017). "A Functional Relationship for Modeling Laminar to Turbulent Flow Transitions." ASME. J. Fluids Eng. September 2017; 139(9): 091202. https://doi.org/10.1115/1.4036594
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