The Physics of Olive Oil

TL;DR

This article frames olive oil extraction as a physics-driven process, linking antiquated pressing methods to modern, sealed, centrifuge-assisted technology. It highlights core physical mechanisms—buoyancy, drag, surface tension, and porous-flow dynamics—through quantitative relations such as $v=\frac{2}{3}\frac{r^2 g\left(\rho_0-\rho_1\right)}{\eta_0}\frac{\eta_0+\eta_1}{2\eta_0+3\eta_1}$ and $Q=\frac{\kappa S \Delta P}{\eta L}$ to explain separation, coalescence, and filtration. The main contributions show how physics-informed redesign (horizontal decanters, vertical centrifuges) accelerates processing, improves oil purity, and reduces oxidation, enabling large-scale production while maintaining quality. The findings bridge traditional craftsmanship and engineering, underscoring how scientific principles enable safe, efficient, and scalable production of extra virgin olive oil.

Abstract

Olive oil is an integral part of Mediterranean culture, shaped by more than three thousand years of history, rich traditions, evolving technologies, and fundamental physical principles. This article explores the role of physics in the production of olive oil, highlighting how physical laws govern each stage of the process.

Figures (8)

• Figure 1: The Museum of Olive Oil in Monte San Savino.
• Figure 2: Washing machine.
• Figure 4: The stone wheel for olive crushing.
• Figure 5: The modern slow crusher (frangitore).
• Figure 6: Ancient mechanical press.