Pattern-guided simulations of immersed rigid bodies
Pattern-guided simulations of immersed rigid bodies
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DOI：
10.1145/2822013.2822019
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Haoran Xie;K. Miyata
中科院分区：
文献类型：
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作者：
Haoran Xie;K. Miyata
本文提出了一种模式导向的浸入式刚体模拟框架，该框架涉及静流中完全浸入式或浸入式刚体的非定常动力学。通过力系数的参数估计，建立了一种考虑与周围流动不同的流动效应的新框架，取代了流体-体耦合模拟的繁重计算。我们区分了惯性效应、粘性效应和湍流效应对刚体的流动效应。在实际流动中，粘性效应的力系数很难确定。本文定义了刚体模拟器中粘性力的控制参数，并提出了一种确定控制参数时间序列的能量优化策略。这种策略是建立在运动模式和湍流动能的运动图上的。该方法实现了高效、逼真的浸入式刚体仿真结果，且仿真结果与体涡耦合的实时动画相关。
This paper proposes a pattern-guided framework for immersed rigid body simulations involving unsteady dynamics of a fully immersed or submerged rigid body in a still flow. Instead of the heavy computation of fluid-body coupling simulations, a novel framework considering different flow effects from the surrounding flow is constructed by parameter estimation of force coefficients. We distinguish the flow effects of the inertial, viscous and turbulent effects to the rigid body. It is difficult to clarify the force coefficients of viscous effect in real flow. In this paper we define the control parameters of viscous forces in rigid body simulator, and propose a energy optimization strategy for determining the time series of control parameters. This strategy is built upon a motion graph of motion patterns and the turbulent kinetic energy. The proposed approach achieves efficient and realistic immersed rigid body simulation results, and these results are relevant to the real-time animations of body-vorticity coupling.