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Prediction of wake in a curved duct
Author(s) -
Narasimhan J. L.,
Ramjee V.,
Diwakar Philip M.,
Tulapurkara E. G.
Publication year - 1991
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.1650130708
Subject(s) - wake , turbulence , mechanics , curvature , airfoil , duct (anatomy) , physics , radius , geometry , shear stress , mathematics , medicine , computer security , pathology , computer science
Abstract Experimental data on the development of an aerofoil wake in a curved stream are compared with calculations based on the k ‐ε model of turbulence with standard constants and with the model constant C μ dependent on the local curvature. The mean velocity profile is asymmetric, the half‐width of the wake is more on the inner side of the curved duct than on the outer side, and the turbulent shear stress decreases rapidly on the outer side. The standard k ‐ε model is able to satisfactorily reproduce this behaviour. Making C μ dependent on the local radius improves the agreement on the inner side but slightly worsens it on the outer side.