粘性流体中の三次元振動物体に作用する付加質量の数値解析（手法の提案と簡単な例への応用）

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In many fluid-structure-interaction problems, the added mass, or the virtual mass, is one of important interests. In the present study, we propose a simple and efficient method to specify fluid-force coefficients of an oscillating object in fluid. In this method, we consider incompressible-and-viscous fluid under the assumption of an infinitesimal oscillation amplitude of a three-dimensional object, and properly modify the Navier-Stokes equations into linear equations, namely, the Brinkman equations. The solving method is based on a discrete singularity method. In order to confirm the method's effectivity and validity, we compute a sphere and a short cylinder, comparing our computations to theories and experiments which show good agreement.
一般社団法人日本機械学会の論文