Wake stiffness and its application: Tethered cylinders and flying snakes

Abstract eng:
Wake stiffness is the tendency of the wake of an upstream body to pull a downstream body toward the centerline of the wake. Here, we investigate and discuss the validity of applying the wake stiffness model to the dynamics of a tethered pair of cylinders in a uniform flow. We find that wake stiffness provides an effective simplified model for tethered cylinders, but does not explain the whole behavior, particularly for cylinder spacings above 3.5 diameters. We also explore the extension of the wake stiffness concept to modeling the underlying mechanics of flying snakes.

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