Abstract
An alternative methodology to compute aerodynamic coefficients, such as lift and drag, using the direct simulation Monte Carlo method is presented. This methodology, which is valid for all flow conditions, is then applied to investigate the aerodynamic characteristics of nonequilibrium flow past a rotating cylinder. This work focuses specifically on the transition flow regime in which an inverse Magnus effect involving a directional change in lift force can be observed. In particular, the Magnus force and the inverse Magnus effect in subsonic flow are investigated by studying the variation in the aerodynamic coefficients and their normal stress, fluid pressure, and shear stress components. Illustrative results studying the aerodynamic force components as a function of flow rarefaction, Reynolds number, and incomplete surface accommodation are presented, which provide fundamental insight into the physics occurring under nonequilibrium flow conditions.
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