A few years ago Hackaday featured a laminar project which ... followed by the straws and an inch gap to the exit nozzle. To get a nice flow, the edge of the exit nozzle must be as sharp as possible.

How many times a day do we turn on a faucet? Do it now. First very slowly, and you will see glassy, orderly flow. If there is no wind or other disturbance, nothing will change. This is called laminar ...