Improvements in highly viscous fluid simulation using a fully implicit SPH method

Daniel Morikawa, Mitsuteru Asai, Nur Ain Idris, Yusuke Imoto, Masaharu Isshiki

研究成果: ジャーナルへの寄稿記事

抜粋

This study describes the application of two main improvements in highly viscous fluid simulations using the smoothed particle hydrodynamics (SPH) method: an implicit time integration scheme to overcome the problem of impractically small time step restriction and the introduction of air ghost particles to fix problems regarding the free surface treatment. This study adopts the incompressible SPH as a basis for the implementation of these improvements, which guarantees a stable and accurate pressure distribution. We verified the proposed implicit time integration scheme with simulations of pipe flow and the free surface treatment with a simple hydrostatic problem. As a result, the free surface of the hydrostatic problem became very smooth and stable. In addition, we conducted a variety of dam-break simulations to validate this proposed SPH method, as well as to analyze the density and divergence error. Finally, we demonstrate the potential of this method with the highly viscous vertical jet flow over a horizontal plate test, which features a complex viscous coiling behavior.

元の言語英語
ページ(範囲)529-544
ページ数16
ジャーナルComputational Particle Mechanics
6
発行部数4
DOI
出版物ステータス出版済み - 10 1 2019

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Civil and Structural Engineering
  • Numerical Analysis
  • Modelling and Simulation
  • Fluid Flow and Transfer Processes
  • Computational Mathematics

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