Wadsworth, Fabian B, Vossen, Caron EJ, Heap, Michael J, Kushnir, Alexandra, Farquharson, Jamie I, Schmid, Diana, Dingwell, Donald B, Belohlavek, Lukas, Huebsch, Mila, Carbillet, Lucille et al (show 1 more authors)
(2021)
The force required to operate the plunger on a French press.
American Journal of Physics, 89 (8).
pp. 769-775.
Abstract
<jats:p>The French press is a popular device for brewing coffee, comprising a cylindrical beaker—or “jug”—fitted with a lid and plunger with a fine wire mesh filter. The plunger is used to drive the solid coffee particles to the bottom of the jug, separating these grounds from hot liquid above. When using the French press in this way, a growing permeable pack of ground coffee is pushed through hot water by applying force to the plunger. We use a combination of kitchen-based and laboratory experiments to determine the force required to push on the plunger as a function of the speed of the plunger and the mass of coffee used. We calculate that for the recommended preparation method, the maximum force is 32 N to complete the pressing action in 50 s. We propose that home coffee preparation provides a fun, low-cost, and relatable learning opportunity for students and for those who are interested in coffee science.</jats:p>
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Science and Engineering > School of Environmental Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 21 Dec 2021 13:53 |
| Last Modified: | 21 Aug 2023 03:08 |
| DOI: | 10.1119/10.0004224 |
| Open Access URL: | https://www.pure.ed.ac.uk/ws/files/221752037/393._... |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3145782 |
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