A Smoothed Particle Hydrodynamics model for 3D solid body transport in free surface flows
A Smoothed Particle Hydrodynamics model for 3D solid body transport in free surface flows
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DOI：
10.1016/j.compfluid.2015.04.018
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发表时间：
2015-08-15
影响因子：
2.8
通讯作者：
Guandalini, Roberto
中科院分区：
文献类型：
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作者：
Amicarelli, Andrea;Albano, Raffaele;Guandalini, Roberto
本研究发展了一个三维光滑粒子流体动力学（SPH）数值方案，以再现刚体在自由表面流（如洪水，表面波）中的输运。它是基于欧拉-牛顿方程的身体动力学，通过SPH形式主义实现。基于半解析方法，该方案已与主流的弱可压缩（WC）-SPH模型耦合（Di Monaco等人，2011年）。Adami等人（2012）的SPH边界处理已被实施并适用于自由滑动条件，以模拟“流体-固体”耦合项。另一方面，“固体-固体”（“体-体”和“体-边界”）相互作用由Monaghan（2005）的“边界力粒子”表示。该技术已通过引入一些修改来实现，以表示整个机构（不仅是孤立的粒子）的撞击，即使在低veloce.The新的模型已经验证了一系列的2D和3D的测试用例。他们涉及的初步测试都与单个和多个机构和边界，四个水条目的下降固体楔，和传播的三维溃坝前。这是由一个移动的门的定期升降驱动，运输一个浮动体（6个自由度），并影响两个固定的障碍物和几个固体边界。最后一种现象也在本研究中通过实验实现。验证是指与测量值、非定常雷诺平均纳维尔-斯托克斯（URANS）结果、其他SPH模型、分析和理论解的比较。(C)2015爱思唯尔有限公司版权所有。
This study has developed a 3D Smoothed Particle Hydrodynamics (SPH) numerical scheme to reproduce the transport of rigid bodies in free surface flows (e.g. floods, surface waves). It is based on the Euler-Newton equations for body dynamics, implemented through the SPH formalism. This scheme has been coupled to a Weakly Compressible (WC)-SPH model for the main flow, based on the semi-analytic approach (Di Monaco et al. 2011). The SPH boundary treatment of Adami et al. (2012) has been implemented and adapted to free-slip conditions to model the "fluid-solid body" coupling terms. On the other hand, the "solid-solid" ("body-body" and "body-frontier") interactions are represented by the "boundary force particles" of Monaghan (2005). This technique has been implemented by introducing some modifications to represent the impingements of entire bodies (not only isolated particles), even at low velocities.The new model has been validated on a sequence of 2D and 3D test cases. They involve preliminary tests both with single and multiple bodies and frontiers, four water entries of falling solid wedges, and the propagation of a 3D dam break front. This is driven by the regular lift of a mobile gate, transports a floating body (6 degrees of freedom) and impacts two fixed obstacles and several solid frontiers. This last phenomenon has also been experimentally realized during this study. Validation refers to comparisons vs. measurements, Unsteady Reynolds-Averaged Navier-Stokes (URANS) results, other SPH models, analytical and theoretical solutions. (C) 2015 Elsevier Ltd. All rights reserved.