The flow of water through the coffee bed is a complex phenomenon governed by the principles of fluid dynamics. As the water flows through the coffee, it encounters resistance from the coffee grounds, which creates a pressure drop. This pressure drop drives the flow of water through the coffee bed.
Before the continuous extraction begins, a preliminary "bloom" phase is required. Roasting coffee traps large amounts of carbon dioxide ( CO2cap C cap O sub 2 the physics of filter coffee epub work
: While some sources mention the existence of .mobi or PDF files on sites like Dokumen.pub The flow of water through the coffee bed