地下停車場自然通風最佳化設計之研究

Project Details

Description

The interaction between suspended particles in viscous fluids and side wallsoccurs in many flow fields, such as the sediment transport in rivers, the transportof suspended particles in pipe flows, the particulate matters in fluidized beds, andthe blood cells in blood vessels, etc. The trajectory of particles in these flow fieldswill be affected by the sidewalls. Based on the previous experimental results ofthe PI, the falling trajectory of the sphere will deviate from a straight vertical lineand behave like a S-curve when the gap between the sphere and the side wall isless than a certain distance. This study plans to use numerical simulation toinvestigate the falling processes of spheres under different distances from thesidewall of a water tank. The effects of sphere density, falling speed andReynolds number will be examined through a series of fluid/solid coupledsimulations. The pressure and lateral force on the falling sphere will be computedby the LES model. The trajectory of the falling sphere will be calculated by thediscrete element method and compared with the experimental results. Thedimensionless ratio of the lateral force and gravitational force will be used toquantify the falling process, and to determine whether the falling trajectory of thesphere will be affected by the sidewalls.
StatusFinished
Effective start/end date1/08/2230/09/23

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 11 - Sustainable Cities and Communities
  • SDG 16 - Peace, Justice and Strong Institutions
  • SDG 17 - Partnerships for the Goals

Keywords

  • Sidewall effect
  • Fluid/Solid Interaction
  • Large eddy simulation
  • Discrete element method

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