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Hydrodynamic Simulation of Flow in Reverse Osmosis Membranes for Seawater Disalination

Yarmohammadi, Amir Mohmamad | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56182 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Seif, Mohamad Saeed; Mehdigholi, Hamid
  7. Abstract:
  8. Water is the most essential human need and the lack of fresh water soon is one of the biggest problems of mankind. One way to deal with the lack of fresh water is desalination of seawater. Seawater desalination is done by different thermal and membrane methods. In this research, the methods and history of freshwater supply methods and the role of chains in the progress of seawater desalination, and the measures taken in the field of seawater desalination have been investigated. Among the various methods discussed and proposed in this research, it was concluded that reverse osmosis membrane is available and has an acceptable economic efficiency compared to other methods. After choosing the reverse osmosis method as an optimal and practical method, the history and details of using this method and mathematical and computer modeling have been investigated. Finally, by using the STARCCM+ commercial software, the flow inside the reverse osmosis membranes has been simulated to check and improve the performance of these membranes. After examining the contours of velocity and penetration flux of different configurations, including submerged, cavity, and zigzag, it was concluded that the use of zigzag spacers has increased the penetrated flux by 30% compared to the empty channel. Another result of this research is the importance of the optimal distance between filaments, which is equal to 1 mm for square and triangular spacers that provide the highest penetration flux and an increase in the channel inlet concentration leads to a decrease in penetration
  9. Keywords:
  10. Seawater Desalination ; Reverse Osmosis Membrane ; Simulation ; Desalination ; Spacers ; Hydrodynamic Simulation

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