CFD simulations of three-dimensional violent sloshing flows in tanks based on MPS and GPU

Xie, Fengze; Zhao, Weiwen; Wan, Decheng

doi:10.1007/s42241-020-0039-8

Cited by 33 publications

(4 citation statements)

References 25 publications

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“…In order to match the model of the real pump, the MPS particle resolution in the whole computational domain will be very high, which increases the computational cost sharply. In the future, the acceleration techniques, including the GPU parallel technique (Xie et al, 2020) and the adaptive multi-resolution technique (Sun et al, 2017), will be introduced to the MPS−DEM solver and more realistic simulations of the hydraulic conveying process will be conducted.…”

Section: Discussionmentioning

confidence: 99%

Numerical Simulations of Liquid-Solid Flows in A Vertical Pipe by MPS-DEM Coupling Method

2022

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In the process of deep-sea mining, the liquid-solid flows in the vertical transportation pipeline are very complex. In the present work, an in-house solver MPSDEM-SJTU based on the improved MPS and DEM is developed for the simulation of hydraulic conveying. Firstly, three examples including the multilayer cylinder collapse, the Poiseuille flow and two-phase dam-break are used to validate the precision of the DEM model, the pipe flow model and MPS-DEM coupling model, respectively. Then, the hydraulic conveying with coarse particles in a vertical pipe is simulated. The solid particle distribution is presented and investigated in detail. Finally, the coupling method is successfully applied for the simulation of the liquid-solid flows in a vertical pipe with rotating blades, which shows the stability of the solver under rotating boundary conditions. This fully Lagrangian model is expected to be a new approach for analyzing hydraulic conveying.

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Section: Discussionmentioning

confidence: 99%

Numerical Simulations of Liquid-Solid Flows in A Vertical Pipe by MPS-DEM Coupling Method

2022

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“…As for a 3D nonlinear free surface problem, Pethiyagoda [15] combined the GPU acceleration technique with the boundary integral method, and LU [16] developed a GPU-accelerated high-order spectral solver. Xie [17] developed the MPSGPU-SJTU solver with a GPU acceleration technique for the liquid sloshing simulation.…”

Section: Introductionmentioning

confidence: 99%

A GPU-Accelerated Method for 3D Nonlinear Kelvin Ship Wake Patterns Simulation

Sun,

Cai,

Ding

2023

Applied Sciences

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The study of ship waves is important for ship detection, coastal erosion and wave drag. This paper proposed a highly paralleled numerical computation method for efficiently simulating three-dimensional nonlinear kelvin waves. First, a numerical model for nonlinear ship waves is established based on potential flow theory, the Jacobian-free Newton–Krylov (JFNK) method and the boundary integral method. To reduce the amount of data stored in the JFNK method and improve the computational efficiency, a banded preconditioner method is then developed by formulating the optimal bandwidth selection rule. After that, a Graphics Process Unit (GPU)-based parallel computing framework is designed, and we used the Compute Unified Device Architecture (CUDA) language to develop a GPU solution. Finally, numerical simulations of 3D nonlinear ship waves under multiple scales are performed by using the GPU and CPU solvers. Simulation results show that the proposed GPU solver is more efficient than the CPU solver with the same accuracy. More than 66% GPU memory can be saved, and the computational speed can be accelerated up to 20 times. Hence, the computation time for Kelvin ship waves simulation can be significantly reduced by applying the GPU parallel numerical scheme, which lays a solid foundation for practical ocean engineering.

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“…Nevertheless, such advanced schemes are usually computationally expensive and difficult to implement due to its high complexity in algorithm. It is also unfavorable for parallelized computing using modern graphical units (GPUs), which is more suitable for handling massive data rather than complex algorithms 26 , 27 .…”

Section: Introductionmentioning

confidence: 99%

A high-efficiency discretized immersed boundary method for moving boundaries in incompressible flows

Liu

et al. 2023

Sci Rep

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The Immersed Boundary Method (IBM) has an advantage in simulating fluid–structure interaction, owning to its simplicity, intuitiveness, and ease of handling complex object boundaries. The interpolation function plays a vital role in IBM and it is usually computationally intensive. For moving or deforming solids, the interpolation weights of all the immersed boundary points ought to be updated every time step, which takes quite a lot CPU time. Since the interpolation procedure within all uniform structured grids is highly repetitive and very similar, we propose a simple and generalized Discretized Immersed Boundary Method (DIBM), which significantly improves efficiency by discretizing the interpolation functions onto subgrid points within each control volume and reusing a predefined universal interpolation stencil. The accuracy and performance of DIBM are analyzed using both theoretical estimation and simulation tests. The results show speedup ratios of 30–40 or even higher using DIBM when compared with conventional IBM for typical moving boundary simulations like particle-laden flows, while the error is estimated to be under 1% and can be further decreased by using finer subgrid stencils. By balancing the performance and accuracy demands, DIBM provides an efficient alternative framework for handling moving boundaries in incompressible viscous flows.

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CFD simulations of three-dimensional violent sloshing flows in tanks based on MPS and GPU

Cited by 33 publications

References 25 publications

Numerical Simulations of Liquid-Solid Flows in A Vertical Pipe by MPS-DEM Coupling Method

Numerical Simulations of Liquid-Solid Flows in A Vertical Pipe by MPS-DEM Coupling Method

A GPU-Accelerated Method for 3D Nonlinear Kelvin Ship Wake Patterns Simulation

A high-efficiency discretized immersed boundary method for moving boundaries in incompressible flows

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