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• W2550652264 endingPage "468" @default.
• W2550652264 startingPage "432" @default.
• W2550652264 abstract "A stable partitioned algorithm is developed for fluid–structure interaction (FSI) problems involving viscous incompressible flow and rigid bodies. This added-mass partitioned (AMP) algorithm remains stable, without sub-iterations, for light and even zero mass rigid bodies when added-mass and viscous added-damping effects are large. The scheme is based on a generalized Robin interface condition for the fluid pressure that includes terms involving the linear acceleration and angular acceleration of the rigid body. Added-mass effects are handled in the Robin condition by inclusion of a boundary integral term that depends on the pressure. Added-damping effects due to the viscous shear forces on the body are treated by inclusion of added-damping tensors that are derived through a linearization of the integrals defining the force and torque. Added-damping effects may be important at low Reynolds number, or, for example, in the case of a rotating cylinder or rotating sphere when the rotational moments of inertia are small. In this first part of a two-part series, the properties of the AMP scheme are motivated and evaluated through the development and analysis of some model problems. The analysis shows when and why the traditional partitioned scheme becomes unstable due to either added-mass or added-damping effects. The analysis also identifies the proper form of the added-damping which depends on the discrete time-step and the grid-spacing normal to the rigid body. The results of the analysis are confirmed with numerical simulations that also demonstrate a second-order accurate implementation of the AMP scheme." @default.
• W2550652264 created "2016-11-30" @default.
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• W2550652264 date "2017-08-01" @default.
• W2550652264 modified "2023-10-01" @default.
• W2550652264 title "A stable partitioned FSI algorithm for rigid bodies and incompressible flow. Part I: Model problem analysis" @default.
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• W2550652264 doi "https://doi.org/10.1016/j.jcp.2017.01.015" @default.
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