CFD-DEM Model for Simulation of Non-spherical Particles in Hole Cleaning Process

Akhshik, S ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1080/02726351.2015.1010760
  3. Publisher: Taylor and Francis Inc , 2015
  4. Abstract:
  5. During the well drilling process, particles are produced in different shapes. The shape of particles can influence the characteristics of particles transport process. The aim of this work is to analyze the effects of particle shape on the transportation mechanism. For this purpose, a three-dimensional model is prepared for simulation of particle transportation with spherical and non-spherical shapes, during deviated well drilling. The motion of particles and the non-Newtonian fluid flow are simulated via discrete element method and CFD, respectively. The two-way coupling scheme is used to incorporate the effects of fluid-particle interactions. Three different samples of non-spherical shapes are constructed using multi-sphere method. The interactions of particle-particle/wall/drill pipe are taken into account via Hertz-Mindlin model. Simulations are carried out for some laboratory-scale configurations and fair agreements with the experimental data available in the literature are established
  6. Keywords:
  7. CFD-DEM method ; Deviated well drilling ; Particles transport ; Computational fluid dynamics ; Deflected boreholes ; Flow of fluids ; Mindlin plates ; Non Newtonian flow ; Non Newtonian liquids ; Spheres ; Dem methods ; Deviated wells ; Multi-sphere method ; Non-Newtonian fluid flow ; Nonspherical particle ; Particle transportation ; Three-dimensional model ; Transportation mechanism ; Well drilling ; Cleaning ; Computational fluid dynamics ; Discrete element method ; Fluid flow ; Force ; friction ; Mathematical model ; Molecular interaction ; Particle size ; Pressure gradient ; Priority journal ; Shear rate ; Shear stress ; Simulation ; Surface area ; Torque
  8. Source: Particulate Science and Technology ; Volume 33, Issue 5 , 2015 , Pages 472-481 ; 02726351 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1080/02726351.2015.1010760?journalCode=upst20