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Simulation of Flow Drag Reduction through Air Injection from the Porous Wall

Boyerahmadi, Amirhossein | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 52129 (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 effect of using backpressure of air injection in a microchannel on internal flow pressure drop were investigated in this study. Multiphase flows are commonly encountered in gas and oil industries. Flow fields in production operations are often complex and include multiphase flows of gas and liquid. Previously, because of their complex nature, these flow patterns have been mostly investigated only experimentally and empirical correlations based on the experimental data. From another point of view, it is almost impossible to experimentally realize all the flow conditions for each of the flow patterns. Nowadays computer facilities provide the tool to construct and use large-scale computational models and calculate these complex two-phase flow types. In this study, we used COMSOL software for our numerical simulations of fluid mobility manipulation on porous media by using backpressure of air injection through microchannel, and effect of air injection on pressure drop is investigated in microchannel, in our simulations. We injected air from some holes in lower surface of microchannel and computed pressure drop of internal flow in microchannel separately, then the results are compared to pressure drop of single-phase flow (without air injection) in microchannel. The idea is to generate a reliable model and use it as a new method of fluid transitions in oil and water industries. The objective of this research is to develop a COMSOL mechanistic model for simulation of gas-liquid two-phase flow and use the numerical validated model to provide thorough insight and understanding the effect of different operational parameters such as inlet gas(air) and liquid (water) ratio, flow rate and pressure drop along the microchannel
  9. Keywords:
  10. Multiphase Flow ; Air Injection ; Microchannel ; Pressure Drop ; Perforated Baffle ; Drag Reduction

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