A High Performance Computing Approach to the Simulation of Fluid-Solid interaction Problems with Rigid and Flexible Components

Pazouki, Arman; Serban, Radu; Negrut, Dan

doi:10.2478/meceng-2014-0014

Cited by 18 publications

(12 citation statements)

References 32 publications

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“…shows the transient velocity profiles obtained via the consistent SPH discretization of Eqs. (8)-(14). The proposed approach accurately predicted the velocity profiles for ratios of Υ LH =1, 2, and 4.…”

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confidence: 87%

“…These particles move according to inter-particle interactions and external forces. Due to its Lagrangian nature, SPH enables efficient modeling of multiphase flows with moving interfaces [2,3,4], complex fluids [5,6,7,8], materials subject to large deformation [9,10,11], fluid-structure interactions (FSI) problems [12,13,14], and various transport phenomena [15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

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A consistent multi-resolution smoothed particle hydrodynamics method

Pan

Rakhsha

et al. 2017

Computer Methods in Applied Mechanics and Engineering

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We seek to accelerate and increase the size of simulations for fluid-structure interactions (FSI) by using multiple resolutions in the spatial discretization of the equations governing the time evolution of systems displaying two-way fluid-solid coupling.To this end, we propose a multi-resolution smoothed particle hydrodynamics (SPH) approach in which subdomains of different resolutions are directly coupled without any overlap region. The second-order consistent discretization of spatial differential operators is employed to ensure the accuracy of the proposed method. As SPH particles advect with the flow, a dynamic SPH particle refinement/coarsening is employed via splitting/merging to maintain a predefined multi-resolution configuration. Particle regularity is enforced via a particle-shifting technique to ensure accuracy and stability of the Lagrangian particle-based method embraced. The convergence, accuracy, and efficiency attributes of the new method are assessed by simulating four different flows. In this process, the numerical results are compared to the analytical, finite element, and consistent SPH single-resolution solutions. We anticipate that the proposed multi-resolution method will enlarge the class of SPH-tractable FSI applications.volume methods for FSI. The expectation is that APR will maintain the accuracy of the SPH solution while improving efficiency and increasing the size of the problem solved.In this context, several multi-resolution SPH methods have been proposed, e.g., [19,20,21,22,23,24,25]. In these efforts, SPH particles were distributed according to a pre-defined multi-resolution configuration. What set these approaches apart was the coupling between regions of different resolutions and thereby the accuracy and continuity of the numerical solution at and near the interface. In [26], the same large smoothing length was used for both the low-and high-resolution regions. This enhanced the accuracy attribute of the solution in some degree but led to a large number of neighbors for the particles in the high-resolution region. Thus, performance was hurt, which defeated APR's purpose. In [23,27,24], each region had its own smoothing length, which reduced the computational cost substantially. However, using an inconsistent SPH discretization, the numerical solution near the interface lacked accuracy, an artifact that became worse as the ratio of the two resolutions increased. This point will be demonstrated in §3.1. To tackle this issue, an approach promoting different-resolution subdomains connected via an overlap region was described in [25]. Therein, the overlap region was employed to exchange state information and fluxes. At each time step, the solutions in the two subdomains were brought in sync via the overlap region by an iterative process. The authors investigated the sensitivity of numerical accuracy with respect to the thickness of the overlap region; a minimum thickness of the overlap region was determined numerically. On the upside, the approach can employ a different time step fo...

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confidence: 87%

Section: Introductionmentioning

confidence: 99%

A consistent multi-resolution smoothed particle hydrodynamics method

Pan

Rakhsha

et al. 2017

Computer Methods in Applied Mechanics and Engineering

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“…In Ref. [79], a general rigid body dynamics and an absolute nodal coordinate formulation (ANCF) were implemented to model rigid and flexible objects interacting with a moving fluid. In 2012, Cherfils and co-workers released JOSEPHINE [80], a parallel weakly compressible SPH code written in Fortran 90, intended for free-surface flows.…”

Section: Introductionmentioning

confidence: 99%

Free-Surface Flow Simulations with Smoothed Particle Hydrodynamics Method using High-Performance Computing

Altomare¹,

Viccione²,

Tagliafierro³

et al. 2018

Computational Fluid Dynamics - Basic Instruments and Applications in Science

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Today, the use of modern high-performance computing (HPC) systems, such as clusters equipped with graphics processing units (GPUs), allows solving problems with resolutions unthinkable only a decade ago. The demand for high computational power is certainly an issue when simulating free-surface flows. However, taking the advantage of GPU's parallel computing techniques, simulations involving up to 10 9 particles can be achieved. In this framework, this chapter shows some numerical results of typical coastal engineering problems obtained by means of the GPU-based computing servers maintained at the Environmental Physics Laboratory (EPhysLab) from Vigo University in Ourense (Spain) and the Tier-1 Galileo cluster of the Italian computing centre CINECA. The DualSPHysics free package based on smoothed particle hydrodynamics (SPH) technique was used for the purpose. SPH is a meshless particle method based on Lagrangian formulation by which the fluid domain is discretized as a collection of computing fluid particles. Speedup and efficiency of calculations are studied in terms of the initial interparticle distance and by coupling DualSPHysics with a NLSW wave propagation model. Water free-surface elevation, orbital velocities and wave forces are compared with results from experimental campaigns and theoretical solutions.

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“…Additionally, parallel computing support can be found in the use of graphical processing units (GPU) to speed up the execution of single instruction multiple data (SIMD) operations. This is commonly used in the computational analysis of very large order systems, like DEM models or fluid/soil interaction using smoothed particle hydrodynamics [13].…”

Section: List Of Tablesmentioning

confidence: 99%

“…Similarly to the AVX methodology, the GPU architecture supports the execution of SIMDs to perform operations on the elements that comprise a large dimensional problem [13]. To The vertical tip node displacement for the static system was determined for increasingly fine element meshes and were compared to a reference solution obtained by ANSYS with a 100x100 brick element mesh (Solid185).…”

Section: High Performance Computingmentioning

confidence: 99%

Integration of deformable tire-soil interaction simulation capabilities in physics-based off-road mobility solver

Peterson¹

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The objective of this study is to integrate a continuum-based deformable tire and terrain interaction model into a general-purpose physics-based simulation environment capable of offroad vehicle mobility analysis and high-performance computing potential. Specifically, the physics-based deformable tire and terrain models which were recently proposed and validated by Yamashita, et al. will be implemented into the structure of the multi-physics simulation engine Chrono. In off-road vehicle mobility analysis, empirical and analytical models have been commonly used for vehicle-terrain interaction. While these models utilize experimental data or terramechanics theories to create quick predictive mobility models, they are unable to capture the highly nonlinear behavior of soft soil deformation, which can lead to inaccurate or unreliable results. In order to resolve these limitations, the use of physics-based numerical approaches have been proposed. These methods make use of finite element and discrete element simulations to describe the interaction between the vehicle and deformable terrain. Continuum-based finite element models transfer tire forces to the terrain and model the deformation with elasto-plastic constitutive equations. Discrete element soil uses a large number of small rigid body particles to describe the microscale behavior of granular terrain, with the deformation of the soil represented by the motion and contact of the particles. While these physics-based models offer a more accurate vehicle-terrain interaction model, the solution procedure can become complex and computationally expensive since co-simulation techniques are often used. To address these issues, the analysis of physics-based full vehicle dynamics simulations utilizing high-fidelity deformable tire and terrain models in a multi-physics engine with highperformance computing capability is desired. To this end, the deformable tire model formulated using the continuum mechanics based shear deformable laminated composite shell element proposed by Yamashita, et al. was integrated into the flexible body dynamics simulation framework of Chrono. This shell element is based on the absolute nodal coordinate formulation and is defined by the global position coordinates and the transverse gradient coordinates of its four nodes. Element lockings are eliminated with the incorporation of the enhanced assumed strain (EAS) and assumed natural strain approaches (ANS). The element formulation includes an extension to model laminated composite materials. Additionally, a locking-free 9-node brick element was integrated into the Chrono framework that makes use of the curvature coordinates at iv the center of the element. This element is formulated with the Hencky strain measure such that multiplicative finite strain plasticity theory can be used to incorporate soil plasticity models, such as the capped Drucker-Prager failure criterion. With the shear deformable laminated composite shell element and plastic soil brick element integrated into the Chrono multi-physi...

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A High Performance Computing Approach to the Simulation of Fluid-Solid interaction Problems with Rigid and Flexible Components

Cited by 18 publications

References 32 publications

A consistent multi-resolution smoothed particle hydrodynamics method

A consistent multi-resolution smoothed particle hydrodynamics method

Free-Surface Flow Simulations with Smoothed Particle Hydrodynamics Method using High-Performance Computing

Integration of deformable tire-soil interaction simulation capabilities in physics-based off-road mobility solver

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