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Multiscale adaptive simulations of unsteady, free-surface flows

  Seminars & Colloquia

November, 25th, 2010, 11 hrs,

Museum für Naturkunde Berlin, Room HS 201 at 11 st

Invalidenstraße 43, 10115 Berlin

Dr. Stéphane Popinet

National Institute of Water and Atmospheric Research (NIWA), Wellington/NZ

and Université Pierre et Marie Curie, Paris

Applications in marine and coastal engineering, flood hazard prevention and oceanatmosphere interactions require the description of free surface dynamics on a wide range of scales: from centimetres to thousands of kilometres. Simulation of unsteady free-surface flows has proved to be one of the most challenging disciplines of computational research.

Robust numerical descriptions of these problems can be facilitated through a hierarchy of theoretical approximations of the unsteady underlying equations of motion. Spatial scales can vary by orders-of-magnitude within these models.

Space and time adaptive approaches have been developed within the Gerris Flow Solver (http://gfs.sf.net). I will show how such approaches can help solve these problems efficiently.

Applications include:

  • small-scale Navier-Stokes simulations of air/water interaction;
  • medium-scale nonlinear shallow-water models of tsunamis;
  • vessel- and obstacle-generated waves;
  • large-scale spectral wave forecasting.
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Turbulent air flow research vessel Tangaroa