The Physics Of Filter Coffee - Pdf

As the water flows through the coffee grounds, it encounters resistance due to the friction between the water and the coffee particles. This resistance causes the water to slow down and lose energy, which is described by the Darcy-Weisbach equation:

\[J = -D rac{dc}{dx}\]

\[h_f = f rac{L}{D} rac{v^2}{2g}\]