[Amath-seminars] Applied Math Seminar by Bob Higdon, Thursday 5/27

[Randall J. LeVeque]

Bob Higdon from Oregon State will be visiting next Thursday and
Friday, and is speaking at 4pm Thursday.

Please let me know if you'd like to meet with him while he is here.

 - Randy LeVeque

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Applied Mathematics Seminar
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Speaker: Robert L. Higdon
         Department of Mathematics
         Oregon State University

Title:  Layered Ocean Circulation Models and Multiple Time Scales

Time: 4pm on Thursday, May 27, 2010

Room: Guggenheim 218

Abstract:

In a layered ocean model, the vertical coordinate is a quantity related to
density, and a vertical discretization amounts to dividing the fluid into
water masses having distinct physical properties.  This talk will begin with
an overview of this kind of model and will then describe some issues related
to multiple time scales.  In a ocean circulation model the fastest motions
are typically external gravity waves, and it is commonplace to split the
fast and slow motions into separate subsystems that are solved by different
techniques.  In connection with this time-splitting process, I will outline
some work related to numerical stability, time-stepping, and conservation of
mass, and I will also mention some issues with spatial discretization that
have recently become apparent.

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