Theses and Dissertations
ORCID
https://orcid.org/0009-0000-6840-4595
Advisor
Mohsen, Azimi
Committee Member
Kim, Sungu
Committee Member
Yuan, Ke
Date of Degree
5-15-2026
Original embargo terms
Embargo 6 months
Document Type
Graduate Thesis - Open Access
Major
Mechanical Engineering
Degree Name
Master of Science (M.S.)
College
James Worth Bagley College of Engineering
Department
Michael W. Hall School of Mechanical Engineering
Abstract
This thesis studies vortex-induced vibration of a cylinder coupled to an electromagnetic circuit. ANSYS Fluent simulations are used to quantify the cylinder VIV (Vortex induced Vibration) response over a range of Reynolds numbers. A circular computational domain is adopted to reduce computational cost relative to a rectangular domain while preserving VIV accuracy. A CFL sensitivity study is used to select a stable and accurate time step. Lock-in behavior is mapped across flow regimes, and peak-response conditions are identified. Mechanical and electromechanical dynamic models are then used to quantify how electrical load changes the system response and shifts the lock-in frequency. Analytical results further show that strong coupling links the circuit dynamics to the structural equations of motion. Structural motion and the circuit are coupled through a skew-symmetric electromechanical coupling matrix, enabling analysis of load-dependent frequency shift. The results provide guidance for structural tuning, cylinder sizing, and operating bandwidth in vortex-driven electromagnetic energy harvesters.
Sponsorship (Optional)
Global Development Seed Grant (GDSG) - International Institute, Mississippi State University
Recommended Citation
Kulkarni, Amit, "Electrical-load–induced frequency shift in a vortex-excited cylinder with Skew-symmetric electromechanical coupling" (2026). Theses and Dissertations. 6929.
https://scholarsjunction.msstate.edu/td/6929
