UNSTEADY SEPARATION AT LOW REYNOLDS NUMBERS.
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Separation depends on many factors including unsteadiness, adverse pressure gradient, freestream turbulence intensities and spectra, compressibility, and three-dimensionality of the flow. In this effort the effects of unsteadiness and adverse pressure gradient are discussed from both an analytical and computational point of view. In order to isolate these effects, the test flow consists of a laminar, two-dimensional, incompressible boundary-layer flow with a predictable, well-described unsteady (e. g. sinusoidal or impulsive) freestream pressure gradient applied. The response of the boundary layer to these fluctuations is observed, in particular, separation location and structure and the rate at which separated regions develop.
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
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