| Titre : |
Simulations and experimental investigation of paint film leveling |
| Type de document : |
texte imprimé |
| Auteurs : |
Fabian Seeler, Auteur ; Christian Hager, Auteur ; Oliver Tiedje, Auteur ; Matthias Schneider, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 767-781 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Revêtements:Peinture
Simulation par ordinateur
Surfaces (Physique)
Thixotropie
Viscosité
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The surface structure of a paint film is the result of the interplay of a variety of physical influences, e.g., the superposition of droplets during spray application, the surface tension-driven leveling, and the viscosity increase in the leveling phase. A numerical simulation program is presented that incorporates all the relevant mechanisms of paint film structure formation during and after spray application. The simulation program was validated by comparing simulations and leveling experiments. The influence of the initial film geometry and viscosity on the leveling behavior is demonstrated. For the investigations, model liquids and commercial paints with an increasing complexity of the physical properties were chosen: Newtonian flow behavior without solvent evaporation, Newtonian flow behavior with solvent evaporation, viscoelastic paints with non-Newtonian flow behavior. Four variants are proposed regarding how thixotropy can be measured and how a mathematical model can be created. The advantages and disadvantages of the variants with regard to the implementation of thixotropy in the simulations are listed. A method to predict the leveling behavior of thixotropic paints with simultaneous recovery of the viscous and elastic properties from rheological measurements using discrete relaxation time spectra is presented. |
| Note de contenu : |
- STATE OF RESEARCH
- EXPERIMENTAL AND COMPUTATIONAL PROCEDURE : Simulation program - Physical models - Measurement methods
- RESULTS AND DISCUSSION : Initial film geometry - Newtonian model liquids without solvent evaporation - Newtonian paint with solvent evaporation - Non-newtonian paints with thixotropic and viscoelastic behavior - Leveling of an irregular 3D topography |
| DOI : |
10.1007/s11998-017-9934-s |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9934-5.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28919 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 4 (07/2017) . - p. 767-781
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