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Applicability of algebraic models based on unidirectional flow to duct flow with lateral motion
Author(s) -
Naot D.,
Rodi W.
Publication year - 1981
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650010304
Subject(s) - turbulence , open channel flow , mechanics , flow (mathematics) , duct (anatomy) , equations of motion , hele shaw flow , pipe flow , motion (physics) , classical mechanics , physics , geometry , mathematics , anatomy , medicine
The solution for the stress transport turbulence model equations for the situation where the flow is unidirectional is now commonly applied to flows with weak secondary currents in closed ducts, open channels, and rod bundles in nuclear reactor channels. Here, perturbations to the unidirectional flow solutions are studied by solving the exact equations using an iterative procedure. Now the equations also contain the small lateral velocity gradients formerly neglected. The applicability as well as the limitation of the use of the unidirectional flow turbulence model for the description of channel flow with lateral motion are discussed. Modifications for weak lateral motion are suggested.