有限振幅で振動する球に作用する付加質量力と付加減衰力の実験

抄録

In many fluid-structure-interaction problems, the “added mass,” “inertial mass,” “virtual mass,” “carried mass” or “induced mass” is one of important interests. In the present study, the authors focus on the fluid force of an oscillating sphere in stationary incompressible-and-viscous fluid. More specifically, the authors conduct experiments in order to reveal the fluid force, comparing the experiments with the linear theory assuming an infinitesimal oscillation amplitude. As a result, the experiments show good agreement with the linear theory. This confirms the accuracy of the experiments, together with the effective amplitude’s range where the linear theory is valid.