Coffee painting

• Autores: Said Shakerin
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 62, Nº. 4, 2024, págs. 319-319
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Enjoy your coffee.

    Leave a small volume of coffee (∼2 cm3) in the cup.

    Swirl the coffee around.

    Tilt the cup ∼30° and hold. As the coffee runs down, some of its particles stick to the bottom.

    Turn the cup a little, tilt, and hold; repeat until you like the formation of particles, or the painting! This is fascinating. Random flows turn into intriguing paintings! The images shown here were cropped to the bottom of a porcelain cup. No other alterations were made to the images.

    The best coffee for this purpose can be found in hotel rooms. It is individually packaged in a filter bag, and fine particles pass through the filter when making coffee.

    * This work was previously presented at the 72nd Annual Meeting of the APS Division of Fluid Dynamics (Nov. 23, 2019–Nov. 26, 2019) (https://doi.org/10.1103/APS.DFD.2019.GFM.P0007).