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Numerical Analysis of Channel Flow over an Elastic Bump, Using Lattice Boltzmann Method- A Biological Application

Rostami Gandomani, Saeed | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50813 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Taeibi Rahni, Mohammad
  7. Abstract:
  8. In recent years, lattice Boltzmann method (LBM) has been developed to be used as an alternative and promising computational technique to simulate various flows. It originates from classical statistical physics. The ability to simply solve complex flows, simulating of multiphase and multi-component without need to follow the boundaries of different phases, and the inherent ability of parallel processing are notable features of this approach. On the other hand, finite element method (FEM) is widely used in many practical engineering fields, especially in solid mechanics. In this study, in addition to simulating flow over a rigid body, flow over an elastic body is also simulated with a biological application. As noted before, LBM is used to solve the flow, while FEM is used to investigate the deformation of an elastic body (atherosclerosis is considered as a non-rigid body). Note, arterial problems are most important in causing heart attacks and strokes, which are the most common causes of death. Atherosclerosis is generally due to the association of multiple plaques in heart vessels. In this study, the fat-tissue masses (or the elastic body) are considered isotropic. The effects of the flow over the elastic body have been investigated. The flow has been studied in three different Reynolds Number. The results show that there is direct link between Reynolds numbers and the deformation of the elastic body. In other words, increase Reynolds number causes increase in deformation of elastic body, while its drag is significantly reduced. On the other hand, streamlines surrounding the rigid body have been curved more by increasing Reynolds number. This curvature is larger elastic case
  9. Keywords:
  10. Lattice Boltzmann Method ; Finite Element Method ; Elastic Body ; Atherosclerosis ; Channel Flow

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