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S.P. van der Pijl
| Speaker: |
Dr.ir. S.P. van der Pijl (Energieonderzoek Centrum Nederland)
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| Date: |
Friday June 22, 2007
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| Title: |
Modeling of
Three-Dimensional Bubbly Flows with a Mass-Conserving Level-Set Method
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Abstract
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In this
work incompressible two-phase flows are considered. Between the phases
a sharp front, modeled as an interface, exists, where density and
viscosity change abruptly and surface tension forces act. The aim is to
model high density-ratio flows with arbitrary complex interface
topologies, such as occur in air/water flows.
The advection of the interface is the key part of the work, for which
the Level-Set approach is chosen. However, mass-conservation is not an
intrinsic property and is considered the major drawback of the
Level-Set method. To ensure mass conservation, additional effort is
necessary and in this research the Volume-of-Fluid function is used to
conserve mass. This function is advected without the necessity to
reconstruct the interface.
The ease of the method is based on an explicit relationship between the
Volume-of-Fluid function and the Level-Set function. The method is
straightforward to apply to arbitrarily shaped interfaces, which may
collide and break up.
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