They've just published their findings. Titled "Pour-over coffee: Mixing by a water jet impinging on a granular bed with avalanche dynamics," their 10-page paper in the journal Physics of Fluids ...

Or sign-in if you have an account. Those hoping to have a strong cup of coffee with fewer beans ... even with a gentle pour-over jet” — or a thin stream of water. To achieve a gentle pour ...

a smooth laminar water flow, and a funnel-shaped cone to hold the filter. The quality of the resulting cup of coffee is dependent on such variables as the amount of coffee used, the jet radius ...

This increased the flavor extracted from the coffee grounds, but only as long as the water was allowed to flow continuously. “Your jet of water coming out should look like a smooth column all ...

More information: Pour-over coffee: Mixing by a water jet impinging on a granular bed with avalanche dynamics, Physics of Fluids (2025). DOI: 10.1063/5.0257924 ...

where the jet doesn't break up when it impacts the coffee grinds," said author Ernest Park. In particular, the group found the thick water jets typical of standard gooseneck kettles are ideal for ...

More information: Ernest Park et al, Pour-over coffee: Mixing by a water jet impinging on a granular bed with avalanche dynamics, Physics of Fluids (2025). DOI: 10.1063/5.0257924 Journal ...