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Effects of Obstacle Temperature and Motion on Particles Dispersion and Deposition in Cleanrooms

Savalanpour Ardebili, Hamidreza | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46151 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Farhanieh, Bijan; Afshin, Hosein
  7. Abstract:
  8. Nowadays, indoor air quality (IAQ) is a major concern, particularly in cleanrooms where IAQ is controlled to ensure the extreme standards of cleanliness. For this reason, the particles rising from obstacles and distribution inside the indoor environments and cleanrooms are of great importance. In this study, effects of temperature field, releasing height of particles, and obstacle motion on particles rising from the obstacles inside the three-dimensional cleanroom were investigated by Lagrangian and dynamic mesh methods. The results indicated that, the greater the temperature difference between the top surface of the obstacle and airflow, the more the percentage of the particles risen from the surface and ability of the particles in overcoming the deposition process would be. Moreover, as the releasing height of the particles over the obstacle surface and consequently their distance from the top surface of the obstacle increased, percentage of the particles distributed inside the room significantly increased. In addition, results obtained by dynamic mesh method showed that the obstacle motion and its velocity and competition with the velocity of inlet air played a significant role in rising the particles from the surface of moving obstacles
  9. Keywords:
  10. Temperature Variation ; Clean Room ; Particles Size Distribution ; Dynamic Mesh ; Temperature Field ; Particles Rising ; Obstacle Motion

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