Numerical Study on the Influence of Magnetic and Electric Fields on Filtration Performance of Wet Granular Beds

Sabbaghian, Sina | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 52118 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Moosavi, Ali; Sadrhosseini, Hani
  7. Abstract:
  8. The aim of this study is to develop an understanding of the role of the magnetic and electric forces on the filtration performance of wet granular beds. At first, the effect of wetting is considered by locating micro water film around the square channel for particles deposition in four different Reynolds Re=1 to Re=10 number, Typically 1000 particles in different sizes (100nm-10μm) were injected to microchannel when air and water formed completely on the surface of the block. The Drag force, Brownian force, Saffman`s lift force and the gravity force are affecting the particles. After that Dielectrophoretic and Magnetophoretic forces were included in the domain for investigating the role of these forces for collecting aerosol particles. A 2-D microchannel and a micro single square fiber, which is located in the microchannel and its blockage ratio is 0.25, are considered in this simulation. Comsol software is used for simulating. By adding a film of water around the block the efficiency of capturing of particles is increased especially in low Reynolds numbers. For the effect of the electrostatic and electromagnetic field, the variation for particle deposition is 0 to 20 %
  9. Keywords:
  10. Nanoparticles ; Wetting ; Filtration ; Wet Granullar Filters ; Electrostatics ; Electromagnetic ; Electromagnetic Fields

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