An examination of coherent structures in a lobed mixer using multifractal measures in conjunction with the proper orthogonal decompositionA 'lobed mixer' device that enhances mixing through secondary flows and streamwise vorticity is presently studied within the framework of multifractal-measures theory, in order to deepen understanding of velocity time trace data gathered on its operation. Proper orthogonal decomposition-based knowledge of coherent structures has been applied to obtain the generalized fractal dimensions and multifractal spectrum of several proper eigenmodes for data samples of the velocity time traces; this constitutes a marked departure from previous multifractal theory applications to self-similar cascades. In certain cases, a single dimension may suffice to capture the entire spectrum of scaling exponents for the velocity time trace.
Document ID
19910034717
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ukeiley, L. (Clarkson Univ. Potsdam, NY, United States)
Varghese, M. (Clarkson Univ. Potsdam, NY, United States)
Glauser, M. (Clarkson Univ. Potsdam, NY, United States)
Valentine, D. (Clarkson University Potsdam, NY, United States)