Deposition of particles on structured surfaces

Grant number


Project title

Deposition of submicron particles on structured surfaces in an electrical field

Project leader

 Prof. Dr.-Ing. habil. Martin Sommerfeld

 Dr. (PhD) Stefan Horender

Realized by

 Dipl.-Ing. Gerd Teike, Robert Bosch GmbH


Lattice-Boltzmann, Euler-Lagrange, electrical field, deposition of particles

Short description of the project

This project focuses the deposition behavior of submicron electrically charged particles (size range: 20 – 200 nm) on surfaces. Considered is a distribution of electrodes on top of a non-conductive ceramic surface applied with a defined electrical voltage.

Experimental studies show the formation of dendritic structures between the electrodes as a result of the particle deposition.

A numerical model to simulate the growth of these dendritic structures was developed. For this purpose a Lattice-Boltzmann model for the calculation of the gas-flow was coupled with a finite-difference-scheme to calculate the electrical field and an Euler-Lagrange model to describe the particle transport. The model considers the effect of deposited particles on the fluid-flow and the electrical field. The agreement between numerical (Fig. 2) and experimental results is qualitatively well regarding to the direction and dynamics of the growth of the dendrites.

Last Modification: 26.09.2017 - Contact Person: Webmaster