Filter coffee brewing is a textbook example of flow through a porous medium. The governing equation is :
The heat transfer during brewing can be described using the principles of convective heat transfer. The hot water loses heat to the surroundings as it flows through the coffee grounds and the filter, resulting in a decrease in temperature. The rate of heat transfer is influenced by the temperature difference between the water and the surroundings, as well as the flow rate of the water. the physics of filter coffee pdf full
Extraction occurs at the surface of the particle. Filter coffee brewing is a textbook example of
– Corrochano et al. (2015)
The physics of filter coffee is best explored through the work of astrophysicist Jonathan Gagné , whose book The Physics of Filter Coffee the physics of filter coffee pdf full