standing waves – Adventures in Oceanography and Teaching

Such a pretty #friendlywaves!

mglessmer — Mon, 18 May 2020 12:05:50 +0000

My long time Twitter friend Anne shared these beautiful pictures and I absolutely had to do a #friendlywaves post where I explain other people’s wave pictures. Take a moment to admire the beautiful picture below. Wouldn’t you love to be there? I certainly would! What can we learn from this picture? First — it’s a windy […]

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#wavewatching: Standing waves on coffee on a train!

mglessmer — Sat, 12 Oct 2019 05:11:42 +0000

When I wrote the blog post on “wave watching in a bucket” a couple of days ago, it strongly reminded me of a movie I had filmed already back in March 2018. I was sitting on a train, still inside the train station, and noticed the pattern in my mug (also I just had gotten my […]

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A tiny waterfall, super- and subcritical flows, submerged hydraulic jump, standing waves. What more could anyone want?

mglessmer — Fri, 05 Apr 2019 13:05:30 +0000

Last stop on my work trip that — apart from doing important work, obviously — brought me to Berlin for some wave watching and to Brodowin to look at beaver dams: Eberswalde. Waiting for an appointment, I sat in the sun next to this adorable little waterfall and looked at so many nice examples of […]

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Observing waves in a tank

mglessmer — Thu, 18 Oct 2018 12:00:32 +0000

So you thought filling water into a tank was boring? Not on my watch! This is how we fill up the tank: Through a hole at the bottom. Which leads to a very nice fountain that slowly submerges as the water level rises: …and to tons of nice waves, which are great to observe! Propagation […]

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Wave watching Sunday in Grenoble

mglessmer — Sun, 10 Sep 2017 14:29:44 +0000

Today I went on a wave-hunt expedition to take pictures for posts on the Froude and Reynolds number over at Elin & team’s blog (which you should totally check out if you haven’t done that yet! I am actually proof-reading my posts there and that is saying something ;-)) Anyway. Let’s look at the picture below. […]

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Standing waves in a current

mglessmer — Thu, 04 May 2017 11:13:33 +0000

The other day I found the perfect standing waves on a current: This egg-carton-like pattern really stays pretty constant over time and I think the changes in the wave pattern are mostly due to changes in the sand bed below! You see the sharp edge that is currently being eroded, and sometimes you catch bits […]

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Standing waves

mglessmer — Tue, 06 Sep 2016 11:38:00 +0000

One thing I find endlessly fascinating are – you might have heard it before – standing waves. At the waterfront in Kiel I saw some the other day: Watch the movie below and be fascinated, too! :-) Isn’t it amazing how wave crests and troughs seem to appear out of nowhere and vanish again? When we are so […]

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Wave fields around objects in a channel

mglessmer — Wed, 25 Feb 2015 12:35:48 +0000

One of the reasons I have been wanting to do the vortex street experiment I wrote about on Monday is that it is pretty difficult to visualize flow fields (especially if you neither want to pollute running water somewhere in nature, nor want to waste a lot of water by setting up the flow yourself). As a first order […]

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Standing waves

mglessmer — Fri, 02 May 2014 05:21:27 +0000

Standing waves caused by rocks in a current. I am incredibly fascinated by standing waves. The standing waves are caused by rocks sitting in a current. From the pictures below it is not really clear where those rocks are situated, whether they are upstream of all this wave action or in the focal point of […]

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Velocity of shallow water waves.

mglessmer — Fri, 15 Nov 2013 04:51:19 +0000

The experiment we run to discuss the velocity of shallow water waves. In this post, I discussed how it took us several years to modify an experiment to make it both student and teacher-friendly. But what can you actually see in that experiment? The movies below show the type of standing waves that are excited […]

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