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Prof. Diether Bothe (RTWH Aachen)
| Speaker: |
Prof. Dieter Bothe (Center for Computational Engineering
Science,
RTWH Aachen, Germany)
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| Date: |
Friday April 11, 2008
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| Title: |
Transport
Processes at Fluidic Interfaces - from Interface to Interphase
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Abstract
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Fluid
particles like drops or bubbles play a prominent role in numerous
applications like multiphase chemical reactors, fuel engines,
atomization, drying of liquid sprays, heat exchange and ink-jet
printing to mention just a few. One particular development towards
process intensification relies on micro-systems, which further enhances
the role of inter-material interfaces and requires accurate models and
a profound understanding of these. This talk surveys the continuum
mechanical modeling of two-phase flows with increasing level of
physico-chemical interface properties, starting from a simple dividing
interface to the case when the interface is a phase for itself with
surface viscosity and variable surface tension - the so-called
Boussinesq-Scriven surface fluid. For the different levels of
interfacial properties, the corresponding mathematical models together
with main analytical results are outlined. For some of the models,
results of Volume-of-Fluid (VOF)-based numerical approaches are also
given.
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