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| PM-IBM model for windbreak and its application in simulation of turbulence in dust suppressing areas of storage yards |
| Received:June 21, 2019 Revised:December 17, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20190621001 |
| KeyWord:windbreak dust suppressing Immersed Boundary Method porous medium method PM-IBM model |
| Author | Institution |
| 许栋 |
天津大学 水利工程仿真与安全国家重点实验室, 天津 |
| 张博曦 |
天津大学 水利工程仿真与安全国家重点实验室, 天津 |
| 及春宁 |
天津大学 水利工程仿真与安全国家重点实验室, 天津 |
| 杨海滔 |
天津大学 水利工程仿真与安全国家重点实验室, 天津 |
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| Abstract: |
| A windbreak is an important facility for dust suppressing in storage yards of coals or minerals.It can form wind speed sheltering effect using porous panels and reduce the atmosphere pollution from dust entrainment.Numerical wind tunnel testing based on computational fluid dynamics is an advanced technique for predicting the wind sheltering and dust suppressing efficiencies.However,the model for windbreak panels and their wind resistance effect remains a challenge for wind flow turbulence simulations.In this paper,we combined the Immersed Boundary Method and the Porous Medium model by introducing a force source term into the Navier-Stokes Equations to represent the seepage pressure drop of a windbreak.A PM-IBM(Porous Medium-Immersed Boundary Method) model was established and a numerical boundary for windbreak was implemented in the background of structured grid.This model was applied to simulate turbulent flow in dust suppressing areas of storage yards.Simulation results show that when the windbreak height exceeds 1.4 times of pile height,the dust entraining wind speed grows nonlinearly with windbreak height.The PM-IBM model in combination with the general-purpose CFD solver FLUENT can quickly and accurately simulate the wind sheltering effect of the windbreak and provide support for evaluation of dust-suppressing efficiency. |