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Welcome to
the homepage of
Stavros Kassinos
Stanford University
Turbulence is everywhere... in the earth's atmosphere
and in your stirred coffee
cup!
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Research Interests
Degrees
B.M.E. University of Texas at Austin (1986)
M.S. Stanford University - Mechanical Engineering (1989)
Ph.D. Stanford University (1994)
Primary Research Interests
> Structure-Based Turbulence Modeling (see below)
> Modeling of
Magnetogasdynamic (MGD) Turbulence (see below)
> Direct Numerical Simulation
and Theory for Rotated Shear Flows
Other Research Interests
> Symbolic Tensor Algebra (see below
and Symolica link in menu)
>
Biological
Fluid Dynamics (see link to Fluid Dynamics of Life)
Structure-Based
Turbulence Modeling
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Flow
predictions have become a standard feature of modern flow
system design,
and turbulence modeling is a critical element of
modern
CFD codes used for flow analysis. Models must be fairly
simple
and computationally affordable to be used in repetitive
engineering
calculations, yet they must be
sufficiently
representative
of the flow physics to capture the important
flow
features controlled by
turbulence, such as flow
separation,
skin friction, and heat and mass transfer. As a
result
of the efforts of many contributors, turbulence models
are
now quite adequate for simple flows, but
there remain
important
engineering problems where improved turbulence models
are needed.
There is a particular need for improved models that
are
robust and accurate in rotating flows, which are important
in
aerospace propulsion systems. Advanced
aerospace and
propulsion
systems employing magnetogasdynamics (MGD), and
possible
schemes for control of electrically-conducting
external
flows on aerospace vehicles, also require turbulence
models
superior to those presently available.
We
have been developing a new type
of structure-based
turbulence
model that shows promise as a broadly applicable
tool for
prediction of turbulent flows of engineering interest.
The
structure-based approach has been successful in many flows
where
traditional models fail. An important example, relating
to the flow
through jet engines and parts of turbomachinery, is
the Elliptic Streamlines Flow.
This work is sponsored by AFOSR.
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Symbolica
I
have been developing Symbolica®, a symbolic tensor
algebra
and
tensor manipulation package for Mathematica®.
The great
advantage of
Symbolica® over other symbolic tensor manipulation
packages
is its user friendliness and the use of real index
notation.
Contraction, simplification, symmetrization and
antisymmetrization
are achieved in a natural sequence of
commands.Symbolica®
will automatically
recognize tensor
quantities
and operate on indices (subscripts) using
the
subscript
tensor notation. (Note: currently Symbolica®
is
restricted
to Cartesian tensors). Some examples
of the
capabilities of
Symbolica® are shown here: example 1, example 2.
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Mathematica is a registered trademark of
Wolfram Research Inc.
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Last updated on 07.05.2001
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