Numerical investigation of particle lateral migration in straight channel flows using a direct-forcing immersed boundary method |
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| Institution: | 1. Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran;2. Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran;3. Department of Energy, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran |
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| Abstract: | Inertia-induced cross-stream migration has been recently exploited for precise position of particles in confined channel flows. In this work, a three-dimensional finite volume based immersed boundary method has been developed to study the lateral migration and hydrodynamic self-assembly of neutrally-buoyant particles in pressure-driven flows. Simulation results show that, in 2D channel flows, the equilibrium position for a circular particle is closer to the centreline for larger particle Reynolds number due to the increasing flow rate, while in 3D square duct flow, the equilibrium position for a spherical particle is near a face centre and is closer to the wall for larger particle Reynolds number. Self-assembly of a pair of particles is observed in 3D square duct flows but not in 2D channel flows. Mechanisms for the self-assembly are discussed. |
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| Keywords: | Lateral migration Immersed boundary Self-assembly OpenFOAM |
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