Loading...

Simulation of buoyant bubble motion in viscous flows employing lattice Boltzmann and level set methods

Mehravaran, M ; Sharif University of Technology | 2011

986 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.scient.2011.03.018
  3. Publisher: 2011
  4. Abstract:
  5. Recently, a hybrid Lattice Boltzmann Level Set Method (LBLSM) for two-phase incompressible fluids with large density differences, in cases of negligible or a priori known pressure gradients, has been proposed. In the present work, the mentioned LBLSM method is extended to take into account pressure gradient effects. The lattice Boltzmann method is used for calculating velocities, the interface is captured by the level set function, and the surface tension is replaced by an equivalent body force. The method can be applied to simulate two-phase fluid flows with density ratios up to 1000 and viscosity ratios up to 100. In order to validate the method, the evolution and merging of rising bubbles were investigated, and the results are in agreement with other numerical or experimental results
  6. Keywords:
  7. Bubble dynamics ; Two-phase flow ; Body forces ; Buoyant bubbles ; Density difference ; Density ratio ; Hybrid lattice ; Incompressible fluid ; Lattice boltzmann ; Lattice Boltzmann method ; Level set functions ; Level Set method ; Two-phase fluid flow ; Viscosity ratios ; Drop breakup ; Evolutionary algorithms ; Flow of fluids ; Level measurement ; Numerical methods ; Experimental study ; Numerical model ; Pressure gradient ; Surface tension ; Viscosity ; Viscous flow
  8. Source: Scientia Iranica ; Volume 18, Issue 2 B , 2011 , Pages 231-240 ; 10263098 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1026309811000198