Yoana Grudeva (PhD candidate - Portsmouth University) will give a seminar in room E001 about fluid mechanics of the coffee machine.
Abstract
We have developed a mathematical model for the extraction of coffee using an espresso-style brewing process. The model accounts for the infiltration of water into the dry porous bed of ground coffee, the subsequent transport of coffee solubles from the interior of the grounds (both fines and boulders) to their surfaces where they are dissolved into the water and then transported through the liquid to the outlet of the bed. It's solved numerically using Finite Element method and we're currently working on comparing simulations to experimental data.