On the Force Decompositions of Lighthill and Morison
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Lighthill's assertion that the viscous drag force and the inviscid inertia force acting on a bluff body immersed in a time-dependent flow operate independently is not in conformity with the existing exact solutions and experimental facts. The two force components are interdependent as well as dependent on the parameters characterizing the phenomenon: the rate of diffusion of vorticity, relative amplitude of the oscillation, and the surface roughness.
The article of record as published may be located at http://dx.doi.org/10.1006/jfls.2000.0342
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