Journal of Applied Mechanical Engineering

Eliminating anomalies of CFD model results of the powder coating process by refining aerodynamic flow-particle interaction and by introducing a dynamic particle charging model

3^rd International Conference on Fluid Dynamics & Aerodynamics

October 25-26, 2018 | Berlin, Germany

Boiger Gernot K

Zurich University of Applied Sciences, Switzerland

Scientific Tracks Abstracts: J Appl Mech Eng

Abstract:

A computational fluid dynamic (CFD) model of the powder coating process has been developed using OpenFoam®. It considers particle-dynamic-, aerodynamic-, electro-static- and gravitational effects. While being fully functional, the Eulerian-LaGrangian model has in some cases shown anomalies, yielding coating predictions, which were not observed in comparable experiments. In order to analyse and amend the problem, the underlying Reynolds average stress (RAS) turbulence modelling approach was (i) re-evaluated, compared to (ii) direct numerical simulation (DNS) and (iii) large eddy simulation (LES) flow modelling methods, (iv) improved to account for turbulence impact on flow-particle interaction and (v) extended by a dynamic particle charging algorithm. The effects of the said model improvements were investigated and model-results were compared to measurements of experimentally obtained coating thickness values. It can be shown that the modified simulation model yields a much higher level of correspondence to experiments than previous versions. Recent Publications 1. Bonhoeffer Bastian, Boldrini Marlon, Boiger Gernot Kurt, Kwade Arno and Juhnke Michael (2017) Experimental characterization and simulation of a piezo-actuated micro dispensing valve. Journal of Fluids Engineering DOI: 10.1115/1.4035634. 2. Brunner Daniel, Boldrini Marlon and Boiger Gernot Kurt (2017) Model based analysis of forced and natural convection effects in an electrochemical cell. International Journal of Multiphysics 11(1):97-111. 3. Boiger Gernot Kurt, Ott Tobias, Holzer Lorenz, Penner Dirk, Gorbar Michal and de Hazan Yoram (2017) Multiparameter improvement method for (micro-) structural properties of high performance ceramics. International Journal of Multiphysics 11(1):49-69. 4. Fallah A S, Mehreganian N, Boiger Gernot Kurt and Louca L (2017) Response of armour steel plates to localized air blast load; a dimensional analysis. International Journal of Multiphysics 11(4):387-411. 5. Boiger Gernot Kurt (2016) Eulerian-LaGrangian model of particle laden flows and deposition effects in electro-static fields based on OpenFoam. International Journal of Multiphysics 10(2):177-194.

Biography :

Boiger Gernot K completed his PhD in the year 2009 from University of Leoben, Austria. He is a Senior Lecturer as well as Head of research area of Multiphysics Modeling at the Institute of Computational Physics, Zurich University of Applied Sciences. He has published more than 15 papers in reputed journals and has been serving as an Editorial Board Member and Section Editor of the International Journal of Multiphysics. His expertise includes multiphysics modeling in the context of simulation based product and process development with a strong focus on modeling particle-laden flows in powder coating applications.

E-mail: boig@zhaw.ch