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Lattice Boltzmann Simulation of Fluid Flow Through Porous Media Using Local Grid Refinement

Foroughi, Sajjad | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42303 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Jamshidi, Saeed; Massihi, Mohsen
  7. Abstract:
  8. In the recent two decades Lattice Boltzmann method has been introduced as a class of computational fluid dynamic methods for fluid simulation. In this method instead of solving Navier-Stocks equation, Boltzmann equation is solved to simulate the flow of a fluid. This method originally was developed based on uniform grids which makes lattice Boltzmann a time consuming technique. This feature already exists in the case of simulation of fluid flow in porous media. To eliminate this limitation some research has been done on methods to formulate lattice Boltzmann on unstructured grids. On the basis of this research a method on non-uniform grids has been selected. Here using object oriented programming concept and quad tree grids image of porous media reconstructed, in a way that we have coarse grids in the middle of pores and fine grid near boundaries. In this media simulation of fluid flow using lattice Boltzmann method on non-uniform grids. At the end result of simulation compared with COMSOL software. Regarding to result the decrease in computational time in the proposed method is found to be significant and its accuracy comparing the conventional structured grids is shown to be approvable
  9. Keywords:
  10. Lattice Boltzmann Method ; Pore Scale Simulation of Fluid Flow ; Quad-Tree Grids

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