(Permeability): Determined by the size and distribution of your coffee grounds. (Cross-sectional Area): The width of your brew bed. ΔPcap delta cap P (Pressure Drop): Driven by gravity or external pressure. (Fluid Viscosity): Changes slightly with water temperature. (Bed Depth): The thickness of the coffee bed. Finer grinds decrease permeability (
In a digital edition, this would be a 3-second simulation showing the difference between droplet impact (chaotic) vs. sheet impact (uniform wetting). the physics of filter coffee epub updated
: Pressure drop across the bed (hydrostatic pressure from the water column). (Permeability): Determined by the size and distribution of
This article serves as a to what an updated digital edition (EPUB) should contain, focusing on the physics you cannot see but can absolutely taste. (Fluid Viscosity): Changes slightly with water temperature
At its heart, brewing coffee is an —transferring solubles from solid ground coffee into hot water. This involves three key phases:
The Physics of Filter Coffee (2021) by astrophysicist Jonathan Gagné