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Wednesday, 16 October 2019
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Raw materials & technologies, Technologies

Numerical modeling of the spray coating of spinning bodies

Thursday, 8 August 2019

In a recently published article, scientists deal with the spin coating of the interior of metal beverage cans.

The primary application for the work is to model the spin coating of the interior of two-piece metal beverage cans. Source: PIRO4D / Pixabay.

The primary application for the work is to model the spin coating of the interior of two-piece metal beverage cans. Source: PIRO4D / Pixabay.

Researchers derive the lubrication form of the fluid mechanical equations governing the motion of a thin liquid film on an arbitrarily curved, rotating, axisymmetric substrate. The resulting equations are discretised and then solved numerically using an efficient implicit finite difference algorithm. Non-Newtonian effects are included by incorporating an Ellis viscosity model.

Elimination of a possible defect in the spin coating process

The primary application for the work is to model the spin coating of the interior of two-piece metal beverage cans, and the scientists consider this problem in some depth. Specifically, they show how adjusting several parameters can eliminate one possible defect in the spin coating process: the tendency for droplets to detach from the substrate when the can is spun at high rotation rates.

The study is published in: Journal of Coatings Technology and Research  March 2019, Volume 16, Issue 2, pp 363–376.

Image source: Pixabay

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