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How can variations in water density put drag on a ship?
by mleonhard 6y ago
How can variations in water density put drag on a ship?
- dredmorbius 6y agoBy creating two or more layers of water which don't mix, and create internal waves. A video demo is likely useful. Here, a (model) boat under a constant force (falling mass to right of screen) creates an internal wave, eventually slowing the boat until the wave catches up with the boat, which then accelerates: https://invidio.us/watch?v=5bqa3KSZrHQ https://invidio.us/watch?v=5bqa3KSZrHQ Internal waves can create dramatic effects within the water column depending on bathymetry, whilst leaving. minimal surface evidence: https://invidio.us/watch?v=U2lq8TpLqR4 https://invidio.us/watch?v=U2lq8TpLqR4 Gibraltar is a natural location in wwhich internal waves develop: https://invidio.us/watch?v=x7GXLJQ2Zn0 https://invidio.us/watch?v=x7GXLJQ2Zn0
- thombat 6y agoThat truly was a case of a picture being worth a thousand words - a much more dramatic effect than my puny intuition had guessed, and a nice piece of video editing: a clear view of the salient parts and no blather. Thanks indeed for posting the links.