Resumen de Coffee painting
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).
