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Numerical analysis of the developing fluid flow in a circular duct rotating steadily about a parallel axis
Author(s) -
Gethin D. T.,
Johnson A. R.
Publication year - 1989
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.1650090203
Subject(s) - throughflow , mechanics , reynolds number , pressure drop , inlet , rotation (mathematics) , duct (anatomy) , pipe flow , finite element method , flow conditioning , numerical analysis , flow (mathematics) , physics , geometry , mathematics , turbulence , engineering , mechanical engineering , thermodynamics , mathematical analysis , medicine , pathology
A numerical analysis of the flow pattern in the inlet region of a circular pipe rotating steadily about an axis parallel to its own is presented. Both finite cell and finite element methods are used to analyse the problem and they give qualitatively similar results which show that a swirling fluid motion is induced in the pipe inlet region. The analyses show that the direction of swirl is opposite to that of the pipe rotation when viewed along the flow axis and that its magnitude depends on the speed of pipe rotation and throughflow Reynolds number. Neither numerical analysis predicts the marked upturn in friction factor (or pressure drop) which has been observed experimentally. However, a dependence on the pipe inlet boundary conditions is demonstrated.