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| Solid-phase flushing features numerical simulation of three-dimensional multiphase flow in eddy current device |
| MA Guangfei1,2,3*, WU Yanming1,2, FANG Yong1,2, LI Chao1,2, ZHENG Yu1,2, ZHANG Lei1,2 |
| 1.Hangzhou Mechanical Design Research Institute, Ministry of Water Resource and Standard & Quality Control Research Institute, Ministry of Water Resources, Hangzhou, Zhejiang 310024 310012, China; 2.Key Laboratory of Surface Engineering of Equipments for Hydraulic Engineering of Zhejiang Province Water Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Pro-vince, Hangzhou, Zhejiang 310024 310012, China; 3. National Local Joint Engineering Laboratory of fluid transfer system; Zhejiang Provincial Key Laboratory of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China |
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Abstract In order to study the solid-phase flushing characteristics in an eddy current facility, a computational fluid dynamics(CFD)method was used to simulate its internal flow characteristics. RNG k-ε turbulence model and VOF gas-liquid two-phase flow and DPM discrete phase particle tracking model were used to simulate the three-dimensional flow field of vortex device in Rosin-Rammler particle distribution, and analyze the particle motion, particle size distribution, the influence of fluid flow on particle movement and the closure ratio of vortex device. The results show that the eddy current device, makes its inside and the extended pipeline inside generate the high-speed swirl, and the swirl in the downstream pipeline extends a long distance and reduces the particle content, which is conducive to the rapid flow of particles. The particle movement has strong dependence on fluid flow field. Eddy current device has good closure characteristics and closure flow after stablility is more than 35%(but its structure design has to ensure that the outlet section area is greater than or equal to the inlet section area, this is mainly to prevent clogging), which can be used for the combined sewer pipeline system and sewage interception.
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Received: 05 June 2017
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