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New and overlooked relationships for turbulent flow in channels
Author(s) -
Churchill Stuard W.
Publication year - 1990
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270130136
Subject(s) - turbulence , flow (mathematics) , mechanics , anomaly (physics) , momentum (technical analysis) , constant (computer programming) , mathematics , conservation of mass , open channel flow , statistical physics , physics , computer science , finance , economics , programming language , condensed matter physics
This paper describes general, asymptotic and speculative relationships which can be deduced directly from the time‐averaged form of the basic, partial‐differential model for the conservation of mass and momentum in fully developed turbulent flow of constant‐property fluids through round and parallel‐plate channels. Such relationship are shown to provide insight as well as useful forms for correlation. Several analogies for flow in round tubes and between parallel plates which have generally been overlooked are reexamined and extended. A generally overlooked anomaly which occurs for flow in concentric, circular annuli, for flow between plates of non‐identical roughness, and for the combination of forced and wall‐Ind.uced flow between parallel plates is also is noted. The data needed to test the above analogies and to quantify the deviations, if any identified, as well as those needed to generalize the anomalous behavior.