Abstract |
Numerical methods for solving PDEs posed on (evolving) manifolds
recently received considerable attention.
Applications include image processing, pattern formation and fluid dynamics.
One example of our particular interest is multiphase fluids models if one
takes so-called surface active agents into account. Distribution of the
active agents on the free surface separating different fluids is modeled
by a diffusion-transport equation posed on the surface. In this talk we
review a level-set method for the free surface capturing and some existing
approaches of surface PDEs numerical treatment. Further we focus on a new
finite element method for the discretization of elliptic partial
differential equations on surfaces. It appears that the method is
particularly suitable for problems in which there is a coupling of the
problem in the outer domain with the equation on a surface and the surface
is given implicitly and may vary in time. We present an error analysis of
the method and discuss numerical properties of the corresponding linear
algebraic systems.
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