Abstract
ABSTRACT Investigation of flow separation produced by a single backward facing step placed in a two-dimensional channel for turbulent flow of air was performed. Experiments were performed in two different conditions – flow without backward step (undisturbed flow) and flow with backward step (disturbed flow). The mean velocity profiles in the undisturbed flow were measured and different characteristic lengths were determined and hence the fully developed turbulent boundary layer was attained. A plate was then fixed at the bottom of the tunnel. So that a region of separation flow was created. Monitoring of the velocity at the same grid points showed that the profiles were vigorously distorted giving rise to positive wake effect. The separation length increased with the increase of Reynolds number and the results agree well with other authors.
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