NDLI: A Material Interface Transition Algorithm for Multiphase Flow

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Marianne, M. Francois Robert, B. Lowrie Edward, D. Dendy
Copyright Year	2008
Abstract	Volume tracking method, also referred to as the volume-of-fluid (VOF) method introduces “numerical surface tension” that breaks a filament into a series of droplets whenever the filament is under-resolved. Adaptive mesh refinement can help avoid under-resolution, but a fully-developed flow will still generate filaments that cannot be resolved without enormous computational cost. We propose a complementary new approach that consists of transitioning to a continuous interface representation (i.e. without interface reconstruction) in regions of under-resolved interfacial curvature where volume tracking has become erroneous. The price of the continuous interface treatment is a small amount of numerical mass diffusion, even if the physical interface is immiscible. However, we have found that for certain measures, the overall accuracy is greatly improved by using our transitioning algorithm. The algorithm is developed in the context of the single fluid formulation of the incompressible Navier-Stokes equations. Numerical standard vortices advection test cases and Rayleigh-Taylor instability computations are presented to illustrate the transition algorithm potential.
Sponsorship	Fluids Engineering Division
Starting Page	173
Ending Page	180
Page Count	8
File Format	PDF
ISBN	9780791848401
DOI	10.1115/FEDSM2008-55304
e-ISBN	0791838323
Volume Number	Volume 1: Symposia, Parts A and B
Conference Proceedings	ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
Language	English
Publisher Date	2008-08-10
Publisher Place	Jacksonville, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Fluids Algorithms Navier-stokes equations Multiphase flow Computation Vortices Drops Rayleigh-taylor instability Surface tension Resolution (optics) Diffusion (physics) Flow (dynamics)
Content Type	Text
Resource Type	Article

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