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SUMMARY:Capturing the flow structure beneath water waves - Andre Nachbin (
 IMPA - Instituto Nacional de Matemática Pura e Aplicada\, Rio de Janeiro)
DTSTART:20170807T150000Z
DTEND:20170807T160000Z
UID:TALK74721@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:This talk addresses two problems\, studied through numerical m
 odels\, for capturing the flow structure beneath surface water waves.   Fi
 rst we consider (nonlinear\, traveling) periodic rotational waves\, the ap
 pearance of stagnation points and the possibility of pressure anomalies. S
 econdly\, we consider linear waves in the presence of quite general topogr
 aphies and the numerical construction of a three-dimensional Dirichlet-to-
 Neumann operator. Simulations\, restricted to a two-dimensional free surfa
 ce\, illustrate that the vertical structure of the 3D flow is captured acc
 ordingly even in the presence of large depth variations.
LOCATION:Seminar Room 1\, Newton Institute
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