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Fluid physics of telescoping cardboard boxes
Phys. Rev. Fluids 7, 044101 – Published 1 April, 2022
DOI: https://doi.org/10.1103/PhysRevFluids.7.044101
Abstract
The economics, environmental impact, and mechanical properties of paper-based storage containers have been widely studied. However, knowledge of the physical processes relevant to the end-user experience is unavailable. This paper outlines the main effects associated with the closing and opening of telescoping boxes, which are used, for instance, to store and transport board games, footwear, mobile phones, and tablet computers. The sliding motion of the lid is controlled by the flow in a thin film of air in the gap separating the lid and the base of the box. Based on a broad comparison between theory and experiments on real and synthetic boxes, we find that the process is primarily controlled by the shape of the gap between the base and the lid. We derive a master equation for the lid motion and identify the origin of three distinct experimental regimes. Finally, an optimal design for a rapidly closing box is identified.
Physics Subject Headings (PhySH)
synopsis
Fooling Around with Boxes
Researchers have uncovered the optimal design for a lidded carboard box to ensure that the lid drops as quickly and smoothly as possible—and it’s not what you might think.
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Article Text
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