If you grind too fine, ( k ) drops, and ( Q ) decreases, leading to longer contact time and potential over-extraction. However, if ( \Delta P ) increases (e.g., in an espresso machine), you compensate.
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[ Q = \frac\kappa A \Delta P\mu L ]
[ t = \frac2\mu L^2\gamma \cdot r \cdot \cos\theta ] Where ( \gamma ) is surface tension, ( r ) is pore radius, ( \theta ) is contact angle. If you grind too fine, ( k )
The following factors affect the brewing process and the final cup quality: If you grind too fine
