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## Abstract Results are presented for the flow past a stationary square cylinder at zero incidence for Reynolds number, __Re__ ⩽ 150. A stabilized finite‐element formulation is employed to discretize the equations of incompressible fluid flow in two‐dimensions. For the first time, values of the laminar separation Reynolds number, __Re__~s~, and separation angle, θ~s~, at __Re__~s~ are predicted. Also, the variation of θ~s~ with __Re__ is presented. It is found that the steady separation initiates at __Re__ = 1.15. Contrary to the popular belief that separation originates at the rear sharp corners, it is found to originate from the base point, i.e. θ~s~=180^∘^ at __Re__ = __Re__~s~. For __Re__ > 5, θ~s~ approaches the limit of 135 ^∘^. The length of the separation bubble increases approximately linearly with increasing __Re__. The drag coefficient varies as __Re__^−0.66^. Flow characteristics at __Re__ ⩽ 40 are also presented for elliptical cylinders of aspect ratios 0.2, 0.5, 0.8 and 1 (circle) having the same characteristic dimension as the square and major axis oriented normal to the free‐stream. Compared with a circular cylinder, the flow separates at a much lower __Re__ from a

Author

Subhankar Sen; Sanjay Mittal; Gautam Biswas

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0271-2091)

Published

2010

Language

EN