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Can I read A Mathematical Model for Crater Defect Formation in a Drying Paint Layer on EtoBox?
A Mathematical Model for Crater Defect Formation in a Drying Paint Layer by P.L. Evans; L.W. Schwartz; R.V. Roy is a Chemistry article available to read on EtoBox.
What is A Mathematical Model for Crater Defect Formation in a Drying Paint Layer about?
Certain deep indentations observed in dry coatings are referred to as "craters." They are believed to arise from gradients in the coating surface tension. A mathematical model of surface-tensiongradient-driven flow, using the lubrication approximation for thin layers, is developed to study the formation of craters. The paint is modeled as consisting of an evaporating "solvent" part and a nonvolatile "resin" part. Surface tension gradients on the coating surface arise due to a nonuniform distribution of surfactant. Axisymmetric numerical simulations using the model are performed to explore two candidate crater production mechanisms: an initial release of concentrated surfactant and a steady surfactant source. The effects of changes in various properties, such as the paint drying rate, the surfactant diffusivity, and the viscosity increase during drying, are examined. The model produces craters with large diameters, pronounced rims, and central peaks, similar to those seen in practice. Drying rate has a large influence on crater diameter and depth, by limiting flow due to surface tension gradients within a given time. Reduction of the paint viscosity increase during drying causes inc
Who reads A Mathematical Model for Crater Defect Formation in a Drying Paint Layer?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- P.L. Evans; L.W. Schwartz; R.V. Roy
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)
- Published
- 2000
- Language
- EN
- Field
- Chemistry (Physical Sciences)