Numerical Simulation of Mechanical Energy Transfer between Fluid and a Circular Cylinder Forced to Follow an Elliptical Path

Baranyi, L. (2013) Numerical Simulation of Mechanical Energy Transfer between Fluid and a Circular Cylinder Forced to Follow an Elliptical Path. In: The 12th International Conference on Fluid Control, Measurements, and Visualization, FLUCOME 2013, 2013.11.18-2013.11.23, Nara.

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Abstract

Low-Reynolds number two-dimensional flow around a circular cylinder forced to follow an elliptical path and placed in a uniform stream is investigated numerically using a thoroughly tested finite difference code. Mechanical energy transfer E and time-mean of lift and drag are investigated within the lock-in domain against the transverse oscillation amplitude for Reynolds numbers Re=150 and 200 and frequency ratios 0.8, 0.9 and 1.0 at six different in-line to transverse oscillation amplitude ratio values. The main objective of the paper is to investigate the effects of the shape of the cylinder path (amplitude ratio) and of frequency ratio on the time-mean of lift and drag coefficients and especially on the mechanical energy transfer between the fluid and cylinder. Findings show that both the frequency and amplitude ratios have important effects on the positive E values that may play important roles in the vortex-induced vibration (VIV) of elastically supported cylinders.

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