Observing hydrodynamic phenomena on a creek
Looking at a creek on a Sunday stroll, and seeing lots and lots of concepts from hydrodynamics class. For example below, you see waves radiating from each of the ducks. And…
Tag: Pinnau
Streak lines?
A common problem in hydrodynamics is to distinguish between all the different kinds of lines that characterize a flow field: Stream lines, streak lines, path lines, time lines, and probably…
On vorticity
I’ve promised a long time ago to write a post on vorticity (Hallo Geli! :-)). So here it comes! Vorticity is one of the concepts in oceanography that is often…
Eddy generation and optics.
Eddies. Dips in the surface and shadows on the ground. I always get really fascinated by watching how eddies are generated by obstacles in a fluid. But it is especially…
Waves on a current
When you throw a stick in the water and the waves don’t form circles. Throwing something in the water usually results in waves traveling out in circles from the point…
Surface tension and water striders
How water striders can walk on water. More pictures from the same spot at the banks of the Pinnau. Looking more closely, you can see the water strider: And now…
Refraction of light in water – sticks and lenses.
Deformation in the water surface focussing light. Talking about how a deformation in the surface leads to light being focussed in different ways here and here, another example came to…
Standing waves
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…