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• W4317612217 abstract "We present a comprehensive Euler-Lagrange solver, CP3d, for the direct numerical simulation of particle-laden flows. The solver can handle one-way, two-way, interface-unresolved four-way and interface-resolved coupling regime. To make the solver versatile, different numerical approaches are available for fluid, particle as well as the coupling sub-solver. For the sake of computational accuracy and efficiency, a third-order exponential approximation method is proposed for Basset history force in interface-unresolved regime, and a new simplified lubrication force model based on the averaged integration is utilized in interface-resolved simulation to account for the short-range hydrodynamic force. The volume integration approach is also modified to adapt the staggered mesh configuration. The present solver is intensively validated against several benchmarks. A 2D pencil-like domain decomposition is implemented for parallel communication. The resulting solver is able to simulate large scale cases with billions of grid points and millions of moving particles in interface-resolved four-way regime, using only hundreds of computational cores. In addition, a nearly perfect linear strong scaling performance is achieved. In our test, CP3d is more than ten times faster than other similar solver reported in the literature. Program Title: Channel-Particle 3D, CP3d. CPC Library link to program files: https://doi.org/10.17632/7j6kcf8629.1. Developer's repository link: https://github.com/gongzheng-justin/CP3d. Code Ocean capsule: https://codeocean.com/capsule/0609843. Licensing provisions: MIT License. Programming language: Fortran 95, parallelized using MPI. External libraries: FFTW. Nature of problem: CP3d provides a comprehensive tool to perform the direct numerical simulation for particle-laden flows. One-way, two-way, interface-unresolved four-way and interface-resolved coupling regimes can be conducted. Solution method: the code employs second-/fourth-order finite-difference discretization for the fluid Navier-Stokes equation, and numerically solves the Maxey-Riley equation for the particle phase. In four-way regime, particle collisions are considered by discrete-element method. Immersed boundary method is utilized in the interface-resolved coupling regime." @default.
• W4317612217 created "2023-01-21" @default.
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• W4317612217 date "2023-05-01" @default.
• W4317612217 modified "2023-10-17" @default.
• W4317612217 title "CP3d: A comprehensive Euler-Lagrange solver for direct numerical simulation of particle-laden flows" @default.
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• W4317612217 doi "https://doi.org/10.1016/j.cpc.2023.108666" @default.
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