Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
A spoon will be used to stir when drinking instant coffee or something like that. However, it is inconvenient to carry a spoon in cups with capping, so we often encounter situations when we could not find a spoon or the spoon handle is too short to use. With the inner spiral structure of the cup (spiral counterclockwise in the northern hemisphere, southern hemisphere clockwise spiral), it works by enhancing the directed weak disturbance of Coriolis force, guiding the water flow along the spiral flow, increasing the impact force, thus forming an automatic vortex. Therefore, stirring can be done without stirring spoon.
Sichuan University
Chengdu, China
Sichuan University
Chengdu, China
Xi Chen,Renjie Yang,Liewen Huang,Jian Li