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Topic : Particle level
set method and its application to turbulent
mixing of two-phase flows
Speaker :
Professor Yuan-Nan Young
(Center for Turbulence Research (ME),
Stanford
University)
Time
: June
4 (Friday) AM 10:30~12:00
Abstract:
Turbulent mixing of
multi-phase flows is of great interests in many research fields. In this talk,
I will present results from turbulence simulations of two-phase flows. We use
a hybrid particle level set method (Enright et al., 2003) to capture the
interface in the turbulent flows. Based on the phase-field model, we
propose a simple way to calculate the surface tension force from the
re-initialized level set function.
From direct numerical simulations, we find quantities such
as the number of drops and the total circumference of the drops to scale with
the surface tension at the statistical equilibrium state. In addition we
report evidence for self-similar probability distribution of drop size in
turbulent mixing. If time allows, I will also present an algorithm to enforce
volume conservation in level set methods using ``help" from volume of
fluid methods.
This is a collaboration with F. Ham, V. Cristini, and M.
Herrmann.
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