Lagrangian Coherent Structures for Design Analysis of Revolving Doors
Benjamin Schindler, Raphael Fuchs, Stefan Barp, Jurgen Waser and
Armin Pobitzer, Robert Carnecky, Kresimir Matkovic, Ronald Peikert
ARTICLE,
Visualization and Computer Graphics, IEEE Transactions on,
December, 2012
AbstractRoom air flow and air exchange are important aspects for the design of
energy-efficient buildings. As a result, simulations are increasingly used prior to
construction to achieve an energy-efficient design. We present a visual analysis of
air flow generated at building entrances, which uses a combination of revolving doors
and air curtains. The resulting flow pattern is challenging because of two interacting
flow patterns: On the one hand, the revolving door acts as a pump, on the other hand,
the air curtain creates a layer of uniformly moving warm air between the interior of
the building and the revolving door. Lagrangian coherent structures (LCS), which by
definition are flow barriers, are the method of choice for visualizing the separation
and recirculation behavior of warm and cold air flow. The extraction of LCS is based
on the finite-time Lyapunov exponent (FTLE) and makes use of a ridge definition which
is consistent with the concept of weak LCS. Both FTLE computation and ridge extraction
are done in a robust and efficient way by making use of the fast Fourier transform for
computing scale-space derivatives.
Published
Visualization and Computer Graphics, IEEE Transactions on
Media
BibTeX
@ARTICLE{Schindler12Lagrangian,
author={Benjamin Schindler and Raphael Fuchs and Stefan Barp and Jurgen Waser and
Armin Pobitzer and Robert Carnecky and Kresimir Matkovic and Ronald Peikert},
journal={Visualization and Computer Graphics, IEEE Transactions on},
title={Lagrangian Coherent Structures for Design Analysis of Revolving Doors},
year={2012},
month={December},
volume={18},
number={12},
pages={2159--2168},
abstract={Room air flow and air exchange are important aspects for the design of
energy-efficient buildings. As a result, simulations are increasingly used prior to
construction to achieve an energy-efficient design. We present a visual analysis of
air flow generated at building entrances, which uses a combination of revolving doors
and air curtains. The resulting flow pattern is challenging because of two interacting
flow patterns: On the one hand, the revolving door acts as a pump, on the other hand,
the air curtain creates a layer of uniformly moving warm air between the interior of
the building and the revolving door. Lagrangian coherent structures (LCS), which by
definition are flow barriers, are the method of choice for visualizing the separation
and recirculation behavior of warm and cold air flow. The extraction of LCS is based
on the finite-time Lyapunov exponent (FTLE) and makes use of a ridge definition which
is consistent with the concept of weak LCS. Both FTLE computation and ridge extraction
are done in a robust and efficient way by making use of the fast Fourier transform for
computing scale-space derivatives.},
doi={10.1109/TVCG.2012.243},
ISSN={1077-2626},
url={http://visdom.at/person/5/},
}
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