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Investigation on Transport Phenomena in Porous Media with Multiphase Flow

Alipoor, Mohsen | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50898 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar
  7. Abstract:
  8. Porous media have many applications including heat exchangers, single-phase flow and multi-phase flow packed beds and reactors with different flow patterns, aquifers, and oil and gas reservoirs. To evaluate the behavior of porous media there is need to understand transport phenomena. In this work, we focused on metal foam porous media as an advanced porous media. The effective thermal conductivity of solid matrix, heat transfer in the presence of fluid flow, and pressure drop were investigated using CFD techniques in micro-scale supposing that the solid foam structure consisted of connected kelvin cells. The comparison of simulation results with experimental data reported in literature shows that the obtained results for metal foams with the PPI of 20 and larger were unreliable. In addition, new boundary conditions were imposed at the walls of a bed filled with metal foam and using that an experimental approach was designed. These new boundary conditions and new approach for the design of the experimental setup made possible simultaneous study of the effective thermal conductivity coefficient of the fluid or homogenous multiphase fluid flow in porous media and volumetric heat-transfer coefficient between fluid and solid matrix of porous media, using analytical solution of one dimensional heat-transfer equation at steady-state fluid flow. Moreover the accuracy of imposed boundary conditions was investigated using micro-scale simulations of a small channel. Furthermore, two-phase cocurrent trickle flow was investigated using Volume of Fluid (VOF) method, and just pressure drop was evaluated and compared against experimental data reported in the literature
  9. Keywords:
  10. Porous Media ; Two Phase Flow ; Transport Phenomena ; Heat Transfer ; Metal Foam

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