Research Summaries

Back Collaborative Research: Theoretical prediction of wake lock-in for fluid-structure interactions with phase-reduction analysis

Fiscal Year 2021
Division Graduate School of Engineering & Applied Science
Department Systems Engineering
Investigator(s) Klamo, Joseph
Sponsor National Science Foundation (NSF)
Summary The objective of this experimental and theoretical study is to predict the required amplitude and frequency of forced one- and two-degree-of-freedom motion that leads to synchronization behind an oscillating bluff body, historically called "lock-in," using phase-reduction analysis on the periodic wake dynamics. Phase reduction analysis reveals synchronization characteristics for periodic systems, which has been proven to be a valuable sensor-based approach for studying a wide range of synchronization problems in the fields of biology and physics. The present work will be a joint theoretical and experimental effort to examine the validity of phase-reduction analysis in physical fluid flows and to quantify the influence of turbulence, nonlinearities, and noise on the robustness of the overall approach and the accuracy of the amplitude-frequency predictions. If successful, the experimental and theoretical foundations from this work will enable a systematic study of vortex-induced vibrations (VIV) and the development of physics-driven vibration suppression using phase-reduction models. This method represents a transformative and fundamentally different approach to understanding wake synchronization, moving away from laborious experimental parametric studies to theoretically driven analysis instead. This type of systematic analysis is currently unavailable for the prediction and avoidance of VIV.
Keywords Wake lock-in
Publications Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal
Data Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal