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Translation of a sphere in a rotating viscous fluid: A numerical study
Author(s) -
Rao C. V. Raghava,
Sekhar T. V. S.
Publication year - 1995
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.1650201105
Subject(s) - rossby number , reynolds number , drag coefficient , drag , rotation (mathematics) , physics , mechanics , mathematics , taylor number , inverse , lift coefficient , computational fluid dynamics , viscous liquid , range (aeronautics) , classical mechanics , geometry , flow (mathematics) , turbulence , materials science , composite material
The translation of a sphere moving along the axis of a rotating viscous fluid is studied by the finite difference method at moderate Reynolds (up to R = 500) and Taylor (up to T = 100) numbers. Suppression of the separation is observed with increasing rotation parameter T. The drag coefficient is also presented. It is observed that the drag coefficient is less than that with no rotation in the range 0< N <0·7, where N = 2 T/R is the inverse Rossby number. The same phenomenon was observed experimentally by Maxworthy in the range 0< N <0·75±0·03.