Adventures in Your Kitchen Sink: Stream Thinning
Turn on your faucet. Go on, I’ll wait. Make sure you keep the speed of the water low enough that the water still appears clear (i.e. laminar). Now consider the diameter of the stream near the faucet and then closer to the basin. You should notice that the stream thins as it flows down into the sink. How strange! Stream thinning is not just a quirk of your sink! It is, in fact, a consequence of the very fundamental law…