Work

Incompressible δ -SPH via artificial compressibility

Year: 2023

Type: article

Abstract: Smoothed particle hydrodynamics using artificial compressibility (ACSPH) is developed, with the inclusion of pressure smoothing terms. Theoretical links between pressure/velocity correction incompressible SPH and artificial compressibility are explored, illustrating that ACSPH may be considered an extension of, or closely related to, the δ-SPH method. An implicit dual-time integration procedure is used to enforce an incompressible solution at every time-step, removing acoustic effects arising from the common assumption of weak compressibility. An established weakly-compressible quasi-Lagrangian δ-SPH method is used for comparison against ACSPH, and a series of test cases show that ACSPH provides a similar solution cost to δ-SPH. However, the residual acoustic effects in δ-SPH are removed entirely in ACSPH, providing improved pressure prediction capabilities across all test cases, including intense fluid impacts. Improved modelling of fluid–structure-interaction cases and coupled energy dissipation are also recorded as a result of correctly capturing incompressible flow.

Source: Computer Methods in Applied Mechanics and Engineering

DOI: 10.1016/j.cma.2023.116700

Authors: Joe J. De Courcy, Thomas C.S. Rendall, Lucian Constantin, Brano Titurus, Jonathan E. Cooper

Institutions: University of Bristol, Military Technical Academy

Language: English

Topic: Fluid Dynamics Simulations and Interactions

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,480

Funders: Horizon 2020 Framework Programme, HORIZON EUROPE Framework Programme, Horizon 2020