|Publication type:||Conference other|
|Type of review:||Peer review (abstract)|
|Title:||The modelling of substrate surface interactions in a Eulerian-Lagrangian multiphysics solver and its impact on powder coating pattern prediction|
|Conference details:||International Conference of Multiphysics, Oslo, Norway, 15-16 December 2022|
|Publisher / Ed. Institution:||International Society of Multiphysics|
|Subjects:||Powder coating; coatSim; Multiphysics simulation solver; Particle surface interaction; Eulerian Lagrangian method|
|Subject (DDC):||005: Computer programming, programs and data |
660: Chemical engineering
|Abstract:||In industrial processes, powder coating is widely utilized to attain functional or aesthetic surface properties on manufactured parts. In our previous contributions, we have introduced the software coatSim developed specifically for the simulation of surface coating processes and an underlying Eulerian-Lagrangian Multiphysics solver, developed within OpenFOAM. In the scope of the current study, a closer investigation is conducted into the interactions that occur on the surface of a substrate during the coating process. As a first approximation, it can be assumed that a particle sticks to the substrate at the location of first contact. However, in reality it is observed that particles glide over the substrate, based on the forces acting on them. Of those forces, the pressure force, exerted by the on-setting airflow and the electro-static particle-substrate attraction force act perpendicular and pointing towards the surface of the substrate, while the fluid-particle shear force and an electrostatic particle-particle repulsion force, act parallel to the surface. The gravitational body force, which may have components in both directions, depending on the orientation of the substrate, will complete the force balance on individual particles at a certain location on the substrate. The ratio of magnitude of the sum of perpendicular force components to parallel force components will determine whether a particle will stick or not. In the latter case the particle will drift along the substrate surface until blown-off. It will be demonstrated that the interactions on the surface of the substrate have a big impact on the coating outcome and that experimentally observed patterns can only be predicted accurately if those interactions are taken into account. Experiments conducted previously will form the basis for the validation of the surface interaction model and a dimensional analysis will illustrate the weight of the individual forces on the overall force balance.|
|Fulltext version:||Published version|
|License (according to publishing contract):||Licence according to publishing contract|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Computational Physics (ICP)|
|Published as part of the ZHAW project:||coatSim Software Entwicklung (BREF)|
|Appears in collections:||Publikationen School of Engineering|
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Siyahhan, B., & Boiger, G. (2022). The modelling of substrate surface interactions in a Eulerian-Lagrangian multiphysics solver and its impact on powder coating pattern prediction [Conference presentation]. Multiphysics 2022, 46. https://static1.squarespace.com/static/5c9f89c101232c1d41297d67/t/639912525a90a93394aa8b71/1670976084271/MULTIPHYSICS+2022-Abstract+Booklet.pdf
Siyahhan, B. and Boiger, G. (2022) ‘The modelling of substrate surface interactions in a Eulerian-Lagrangian multiphysics solver and its impact on powder coating pattern prediction’, in Multiphysics 2022. International Society of Multiphysics, p. 46. Available at: https://static1.squarespace.com/static/5c9f89c101232c1d41297d67/t/639912525a90a93394aa8b71/1670976084271/MULTIPHYSICS+2022-Abstract+Booklet.pdf.
B. Siyahhan and G. Boiger, “The modelling of substrate surface interactions in a Eulerian-Lagrangian multiphysics solver and its impact on powder coating pattern prediction,” in Multiphysics 2022, Dec. 2022, p. 46. [Online]. Available: https://static1.squarespace.com/static/5c9f89c101232c1d41297d67/t/639912525a90a93394aa8b71/1670976084271/MULTIPHYSICS+2022-Abstract+Booklet.pdf
Siyahhan, Bercan, and Gernot Boiger. “The Modelling of Substrate Surface Interactions in a Eulerian-Lagrangian Multiphysics Solver and Its Impact on Powder Coating Pattern Prediction.” Multiphysics 2022, International Society of Multiphysics, 2022, p. 46, https://static1.squarespace.com/static/5c9f89c101232c1d41297d67/t/639912525a90a93394aa8b71/1670976084271/MULTIPHYSICS+2022-Abstract+Booklet.pdf.
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