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A fully explicit incompressible Smoothed Particle Hydrodynamics method for multiphase flow problems

Vakilha, M ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.enganabound.2022.06.018
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Multiphase flow is a challenging area of computational fluid dynamics (CFD) due to their potential large topological change and close coupling between the interface and fluid flow solvers. As such, Lagrangian meshless methods are very well suited for solving such problems. In this paper, we present a new fully explicit incompressible Smoothed Particle Hydrodynamics approach (EISPH) for solving multiphase flow problems. Assuming that the change in pressure between consecutive time-steps is small, due to small time steps in explicit solvers, an approximation of the pressure for following time-steps is derived. To verify the proposed method, several test cases including both single-phase and multi-phase flows are solved and compared with either analytical solutions or available literature. Additionally, we introduce a novel kernel function, which improves accuracy and stability of the solutions, and the comparison with a well-established quintic spline kernel function is discussed. For the presented benchmark problems, results show very good agreements in velocity and pressure fields and the interface-capturing with those in the literature. To the best knowledge of the authors, the EISPH method is presented for the first time for multiphase flow simulations. © 2022 Elsevier Ltd
  6. Keywords:
  7. EISPH ; Fully explicit scheme ; Incompressible Smoothed Particle Hydrodynamics (ISPH) ; Meshfree method ; Computational fluid dynamics ; Flow simulation ; Hydrodynamics ; Explicit incompressible smoothed particle hydrodynamic approach ; Explicit scheme ; Flow problems ; Incompressible smoothed particle hydrodynamic ; Kernel function ; Meshfree methods ; Smoothed particle hydrodynamics ; Time step ; Multiphase flow
  8. Source: Engineering Analysis with Boundary Elements ; Volume 143 , 2022 , Pages 501-524 ; 09557997 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0955799722002168