Immersed Boundary Methods: current status and future research directions

15 June 2009  -  17 June 2009
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Immersed Boundary Methods (IBMs) have become increasingly popular in Computational Fluid Dynamics over last years.

In these methods solid obstacles are immersed in a non-conforming fixed grid (e.g., spheres in a Cartesian grid). Forces are imposed on the fluid in the immediate neighborhood of the object boundaries to approximately enforce the appropriate boundary conditions. Characteristic for IBMs is that the computational grid is continuous in space (i.e., extended inside the objects) and hence they are sometimes also referred to as Fictitious Domain Methods. This feature enables the use of efficient flow solvers.
>Reasons for the popularity of IBMs are their computational efficiency and the ease of programming. These issues are of primary importance for applications which involve costly simulations such as Large-Eddy Simulations (LES) and Direct Numerical Simulations (DNS). Moreover, these methods retain much of their elegance when additional physics complicates matter, for instance when boundaries are moving (as in many biological flows) and in case of flows with many moving particles.
>The goal of this colloquium is to bring together both developers and users of IBMs in order to assess the current status of IBMs and future research directions. The focus will be on the use of IBMs in a finite-volume context for solving complex problems with for instance moving boundaries and/or a large number of obstacles. However, contributions from the finite-element community are also welcome. The idea is to share experiences on the development of IBMs as well as on the difficulties and successes encountered in the application of IBMs to different complex flows. Subjects of special interest are theory, accuracy, efficiency, implementation issues, best practice and applications.
>The colloquium is organised by dr. ir. W.P. Breugem, dr. ir. M.J.B.M. Pourquie, prof. dr. B.J. Boersma (TUD) en prof. dr. S. Turek (Universität Dortmund).