基于F-PCISPH的沙粒流交互模拟

在现实动画中，固体、液体和颗粒材料结合上力学性质是对算法设计的重要挑战。提出一种考虑到粒子之间的摩擦力的PCISPH方法，即F-PCISPH，用于模拟固体颗粒材料。颗粒在运动的过程中，除了受到压力、重力、粘力等外力外，颗粒与颗粒之间还存在不可忽略的摩擦力。在确定压力之后计算摩擦力，计算其对粒子流加速度产生的影响，并提出临界密度概念来判断粒子流密度是否小于临界密度，以保证颗粒材料能顺利流动。实验证明F-PCISPH方法和原PCISPH方法同等渲染效率下，程序效果更加逼真。

The Sand Flow Interactive Simulation Based on F-PCISPH

Combining mechanical properties of solids and fluids, granular materials pose important challenges for the design of algorithms for realis-tic animation. Presents a simulation algorithm which is used to simulate the solid granular materials, with considering the friction force be-tween the particles based on PCISPH, namely F-PCISPH. In the process of movement, the friction force between particles can＆#39;t be ig-nored, except for under pressure, gravity, and viscous force. First, computes the friction force after confirming the pressure, then calculates the influence of particle acceleration and presents the concept of critical density, judge granular flow density is less than the critical den-sity to make sure granular materials can flow smoothly. Experiments prove that the F-PCISPH method has a more realistic program effect compared with the original PCISPH method under the same rendering efficiency.