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A Topological Framework for Flow Characterization and Identification

[+] Author Affiliations
Flavia Tauro

New York University Polytechnic School of Engineering, Brooklyn, NYSapienza University, Rome, Italy

Salvatore Grimaldi

New York University Polytechnic School of Engineering, Brooklyn, NYUniversity of Tuscia, Viterbo, Italy

Maurizio Porfiri

New York University Polytechnic School of Engineering, Brooklyn, NY

Paper No. DSCC2014-5837, pp. V002T24A001; 8 pages
doi:10.1115/DSCC2014-5837
From:
  • ASME 2014 Dynamic Systems and Control Conference
  • Volume 2: Dynamic Modeling and Diagnostics in Biomedical Systems; Dynamics and Control of Wind Energy Systems; Vehicle Energy Management Optimization; Energy Storage, Optimization; Transportation and Grid Applications; Estimation and Identification Methods, Tracking, Detection, Alternative Propulsion Systems; Ground and Space Vehicle Dynamics; Intelligent Transportation Systems and Control; Energy Harvesting; Modeling and Control for Thermo-Fluid Applications, IC Engines, Manufacturing
  • San Antonio, Texas, USA, October 22–24, 2014
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-4619-3
  • Copyright © 2014 by ASME

abstract

The characterization of complex flows is often based on kinetic and kinematic measurements computed from high dimensional sets of data. Computationally intensive processing of such large scale data sets is a major challenge in climatological and microfluidic applications. Here, we offer a novel approach based on noninvasive and unsupervised analysis of fluid flows through nonlinear manifold learning. Specifically, we study varying flow regimes in the wake of a circular cylinder by acquiring experimental video data with digital cameras and analyze the video frames with the isometric feature mapping (Isomap). We show that the topology of Isomap embedding manifolds directly captures inherent flow features without performing velocity measurements. Further, we establish relationships between the amount of embedded data and the Reynolds number, which are utilized to detect the flow regime of independent experiments.

Copyright © 2014 by ASME
Topics: Flow (Dynamics)

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