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This paper provides open-source code that works as a viscometer ofparticle-based simulations of three-dimensional fluid-particle interactionsystems, targetting slurry or suspension flow in chemical engineering. Thesmoothed dissipative particle dynamics (SDPD), a fluid particle model developedfor thermodynamic flow at mesoscale, is combined with the contact model of thediscrete element method (DEM). The mechanics of fluid-particle interaction ismodeled by a two-way interaction scheme using a drag-force model. Wedemonstrate our simulation code by several validation tests: simulations ofreverse-Poiseuille flow, single-particle sedimentation, and a dam-breakingproblem containing rigid particles, in reasonable calculation time. Our newopen-source code is beneficial for scientists, researchers, and engineers incomputational physics.

DEMocritus: an open source framework for simulating slurry flows using an SDPD-DEM coupled model