Conference Proceedings Paper
Finite Mixture Model Applied in the Analysis of a Turbulent Bistable Flow on Two Parallel Circular Cylinders
NURETH-14 - 2011 September 25-30
Alexandre De Paula (UFRGS - Federal University of Rio Grande do Sul)
Sergio Möller (Federal University of Rio Grande do Sul)
This paper presents a study of the bistable phenomenon which occurs in
the turbulent flow
impinging on circular cylinders placed side-by-side. Time series of axial and transversal velocity
obtained with the constant temperature hot wire anemometry technique in an aerodynamic
channel are used as input data in a finite mixture model, to classify the observed data according
to a family of probability density functions. Wavelet transforms are applied to analyze the
unsteady turbulent signals. Results of flow visualization show a predominantly two-dimensional
behavior. A double-well energy model is suggested to describe the behavior of the bistable
phenomenon in this case.
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