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The level set modeling of droplet dynamic in fluid-fluid interaction

Darbandi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. In this work, we present a level set method to simulate steady and unsteady mass transfer from a single droplet moving in a second phase fluid under buoyant force. We initially use level set to determine the interface between the two phases, where the shape of drop forms. Next, we extend this method to solve a unique mass transfer equation for the entire solution domain without considering the discontinuity appeared at the interface. We use a finite element method incorporated with the characteristic-based split (CBS) algorithm to implement axi-symmetric mass transfer equations on a stationary Eulerian grid. Of course, the convection-diffusion modeling of mass transfer is different from the Navier-Stokes equation. To expand our study, we consider impact of different non-dimensional numbers such as Reynolds, Weber and Sherwood in simulating various models having different physical properties. The numerical results are compared with our experiments and those of other works reported by the authors. There are good agreements between them. Copyright © 2009 by Professor M. Darbandi
  4. Keywords:
  5. Axisymmetric ; Buoyant forces ; Convection diffusion ; Droplet dynamics ; Eulerian grids ; Fluid-fluid interaction ; Level set ; Level set method ; Mass transfer equations ; Numerical results ; Reynolds ; Second phase ; Sherwood ; Single droplet ; Unsteady mass transfer ; Buoyancy ; Drop formation ; Fluid dynamics ; Fluids ; Mass transfer ; Models ; Navier Stokes equations ; Phase interfaces ; Finite element method
  6. Source: 39th AIAA Fluid Dynamics Conference, 22 June 2009 through 25 June 2009, San Antonio, TX ; 2009 ; 9781563479755 (ISBN)
  7. URL: https://arc.aiaa.org/doi/pdfplus/10.2514/6.2009-4292