Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Poster: Colloids and Complex Liquids

CPP 38.32: Poster

Mittwoch, 16. März 2011, 17:00–19:00, P2

IPBS - An iterative Poisson Boltzmann Solver — •Alexander Schlaich — Institute for Computational Physics Universität Stuttgart Pfaffenwaldring 27 70569 Stuttgart

We present a finite element based method for solving the nonlinear Poisson Boltzmann equation in presence of dielectric missmatch with unknown boundary conditions. Such conditions apply for example to colloidal systems with counterions in solution where the field in the inner part of the particle is not of interest.

Proper boundary conditions are determined by an iterative, fast converging procedure which can be applied to arbitrary geometries. This algorithm allows us to solve a wide class of problems, for example in surface chemistry, colloidal science and general soft matter research, with high efficiency due to the reduced number of grid points. Calculation results are compared both to experimental data and theoretical predictions, e.g. those from DLVO theory.