ANGELO VULPIANI, Università di Roma La Sapienza
FRONT PROPAGATION IN LAMINAR AND TURBULENT FLOWS
Lunedì 29 Marzo 2010, ore 17:00
Dipartimento di Matematica, Politecnico di Milano, Sala Consiglio VII piano |
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Abstract
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The problem of front propagation in a stirred medium is addressed
in the case of laminar and turbulent flows in three different regimes:
slow reaction, fast reaction and geometrical optics limit. It is well
known that a consequence of stirring is the enhancement of front speed
with respect to the non-stirred case. By means of numerical
simulations and theoretical arguments we describe the behavior of
front speed as a function of the stirring intensity. The large scale
of the velocity field mainly rules the front speed behavior even in
the presence of smaller scales. In the unsteady (time-periodic) case,
the front speed displays a phase-locking on the flow frequency and,
albeit the Lagrangian dynamics is chaotic, chaos in front dynamics
only survives for a transient. Asymptotically the front evolves
periodically and chaos manifests only in the spatially wrinkled
structure of the front.
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P.M.H. WILSON, Department of Pure Mathematics and Mathematical Statistics, University of Cambridge
METRIC PROPERTIES OF CALABI-YAU MANIFOLDS
Lunedì 29 Marzo 2010, ore 15:00
Dipartimento di Matematica, Università di Milano | |
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DIETMAR HOEMBERG, Weierstrass Institute for Applied Analysis and Stochastics
THE MATHEMATICS OF DISTORTION
Lunedì 01 Marzo 2010, ore 17:00
Dipartimento di Matematica, Università di Milano, Via Saldini, Sala di Rappresentanza | |
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ALBERTO BRESSAN, Pennsylvania State University
NON-COOPERATIVE DIFFERENTIAL GAMES
Giovedì 25 Febbraio 2010, ore 11:30
Dipartimento di Matematica, Politecnico di Milano, Sala Consiglio VII piano | |
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TIM STEGER, Università di Sassari
50 FAKE PLANES
Lunedì 15 Febbraio 2010, ore 15:00
Aula seminari 3014, Dipartimento di Matematica, Università di Milano Bicocca | |
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Renzo Ricca, Università di Milano-Bicocca
On Gauss' linking number and the energy spectrum of magnetic knots
Mercoledì 16 Dicembre 2009, ore 17:00
Dipartimento di Matematica, Università di Milano, Via Saldini | |
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