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CATEGORIES:Fluid Mechanics (DAMTP)
SUMMARY:Optimization-based flow analysis - Peter Schmid (I
mperial College)
DTSTART;TZID=Europe/London:20160905T160000
DTEND;TZID=Europe/London:20160905T170000
UID:TALK67415AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/67415
DESCRIPTION:Many properties of fluid systems\, such as stabili
ty\, receptivity to external or internal forcing\,
or sensitivity to uncertainties or imperfections\
, can be formulated as an optimization problem wit
h partial-differential equations (PDEs) as side-co
nstraints. Only in the limit of overly restrictive
assumptions do these optimisation problems reduce
to standard and familiar tools for the analysis o
f fluid systems. We will introduce a framework for
the analysis of large-scale fluid systems by PDE-
constrained optimization techniques. This framewor
k will make use of adjoint information which is ex
tracted efficiently from direct numerical simulati
ons of the fluid problem via a modified automatic
differentiation approach. The adjoint methodology
will be demonstrated on various test cases where i
ts flexibility and versatility will be stressed. C
urrent research directions\, generalizations and c
hallenges will be outlined as well.
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberfor
ce Road\, Cambridge
CONTACT:Doris Allen
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