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Numerical simulation of density current using two-phase flow

Afshin, H ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1115/FEDSM2006-98174
  3. Publisher: 2006
  4. Abstract:
  5. Due to shear layer at the interface of density current and ambient fluid, density current disturbs and entrains the surrounding fluid. Most existing analytical and numerical models for density current flows are based on the equations for single-phase flows. In this research, the density current has been modeled with two-phase flow model. The governing equations are continuity, x- momentum, and y- momentum equations for every fluid. The volume-of-fluid (VOF) interface tracking technique which uses a piecewise-linear interface calculation (PLIC) in each cell is used to determine the deformation of free surface in density current, numerically. Surface tension is implemented by the continuous surface stress (CSS), and continuous surface force (CSF) methods. Finally, results of these two models are compared. The model has been verified with the experimental data sets. The Results show that the model can be applied to experimental cases and has acceptable level of accuracy. Copyright © 2006 by ASME
  6. Keywords:
  7. Computer simulation ; Density (specific gravity) ; Electric currents ; Equations of motion ; Interfaces (materials) ; Mathematical models ; Stress analysis ; Ambient fluids ; Continuous surface force (CSF) ; Density current ; Momentum equations ; Two phase flow
  8. Source: 2006 2nd ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006, Miami, FL, 17 July 2006 through 20 July 2006 ; Volume 2006 , 2006 ; 0791837831 (ISBN); 9780791837832 (ISBN)
  9. URL: https://asmedigitalcollection.asme.org/FEDSM/proceedings-abstract/FEDSM2006/47519/49/318940