The Physics Behind a Perfect Cup of Coffee
Scientists discuss the physics of brewing coffee and the importance of heat transfer and fluid dynamics to achieve the perfect flavor. Presented at Wroclaw in September.
- Uploaded on | 1 Views
-
deborahpeters
About The Physics Behind a Perfect Cup of Coffee
PowerPoint presentation about 'The Physics Behind a Perfect Cup of Coffee'. This presentation describes the topic on Scientists discuss the physics of brewing coffee and the importance of heat transfer and fluid dynamics to achieve the perfect flavor. Presented at Wroclaw in September.. The key topics included in this slideshow are . Download this presentation absolutely free.
Presentation Transcript
1. Physics of a Good Coffee Andrei Varlamov COHERENTIA INFM-CNR, Roma Giuseppe Balestrino Universita Tor Vergata, Roma Wroclaw, September,15 2006
2. Italian Moca
3. Filtration: the Darcy Law atm + P P(T)=P atm + P } P = Q L/(S ) ( C) = 10 -3 Pa s P 4 10 4 Pa T* ~ 110 C Q = m/t~200 g/min L ~ 1 cm atm P=P atm Q = S P / ( L) S ~ 10 cm 2 ~ 10 -12
4. The limitation of the Darcy Law at small pressures: opening of the cappillars
5. Moka explosion. ~ 10 -12 ~ 10 -13 ~ 10 -14 M=150 g, V=200 cm 3 T max ~ 300 0 C P max ~ 10 3 atm E ~ PV ~ 40 KJ v=200 m/s PV=m/ RT
6. Espresso machine
