Hello I'm a high school student in Taiwan. My classmate and I are doing a project about the shape of water flowing down from a squared orifice, something like this video.
We wanna know is there a function to describe the shape of flow, like we could find the coordinate of every point? Or the relation between the shape and the area of orifice and different kinds of liquid? Is there a theory which describes this?
We will be very grateful if anybody could help us, and sorry I'm not very good at English, so maybe there're some mistakes in my English.