On the added mass force at finite Reynolds and acceleration numbers
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- Wakaba, L. & Balachandar, S. Theor. Comput. Fluid Dyn. (2007) 21: 147. doi:10.1007/s00162-007-0042-5
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Numerical simulations of flow around a rigid sphere, subjected to a sudden acceleration (or deceleration) in relative velocity, are considered. Particular attention is paid to the interaction between the imposed sudden acceleration and a preexisting finite Re wake. The results clearly establish the independence of added mass coefficient to the acceleration number and to the state of flow prior to acceleration. A simple reasoning based on the different time scales of the flow is given.