2026-04-14T05:16:11Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/859152026-01-14T11:55:16Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Zhang, Hao author Trias Miquel, Francesc Xavier author Oliva Llena, Asensio author Yang, Dongmin author Tan, Yuanqiang author Shu, Shi author Sheng, Yong author 2015-03-01 It is well known that the number of particles should be scaled up to enable industrial scale simulation. The calculations are more computationally intensive when the motion of the surrounding fluid is considered. Besides the advances in computer hardware and numerical algorithms, the coupling scheme also plays an important role on the computational efficiency. In this study, a particulate immersed boundary method (PIBM) for simulating the fluid-particle multiphase flow was presented and assessed in both two- and three-dimensional applications. The idea behind PIBM derives from the conventional momentum exchange-based Immersed Boundary Method (IBM) by treating each Lagrangian point as a solid particle. This treatment enables Lattice Boltzmann Method (LBM) to be coupled with fine particles residing within a particular grid cell. Compared with the conventional IBM, dozens of times speedup in two-dimensional simulation and hundreds of times in three-dimensional simulation can be expected under the same particle and mesh number. Numerical simulations of particle sedimentation in Newtonian flows were canducted based on a combined LBM-PIBM-Discrete Element Method (DEM) scheme, showing that the PIBM can capture the feature of particulate flows in fluid and is indeed a promising scheme for the solution of the fluid-particle interaction problems. Peer Reviewed Postprint (author's final draft) Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids Lattice Boltzmann methods Fluidization Computational fluid dynamics Discrete element method LBM Particulate-IBM DEM Fluid-particle interaction Lattice-Boltzmann method Incompressible viscous flows Simulation Fluidization Velocity Systems DEM Fluïdització Mètodes reticulars de Boltzmann Dinàmica de fluids computacional PIBM: Particulate immersed boundary method for fluid-particle interaction problems