Balances of dyed and un-dyed waters
Oh look, a plume of (almost) un-dyed water hitting the green lake! I am really fascinated by the balance between green water leaking out of the pipeline and into the…
Tag: flow
It’s all about the right equipment: That’s why I now own a UV lamp! I see a lot of fluorescent tracer spotting in my future!
Before I start gushing about my awesome new UV lamp (thanks for encouraging that purchase, Uta! :-)), some other updates on the state of green in the park across the…
Fluorescent night walk — following the stream through the lake into Kiel fjord!
Luckily some of my friends are crazy enough to bring the UV lamps and go on a night walk with me, following the green fluorescent stream! (Don’t know what I…
Dye tracer “in the wild”, day 2
This morning, the green lake looked different yet again. If you remember yesterday’s pictures, we ended the evening with the lake being a fairly well mixed green color (picture on…
Dye tracers “in the wild”
You know I love dye tracers (remember the beautiful fluorescent green we used in the 2017 experiments in Grenoble, when we got to play with the 13m diameter rotating tank?)…
Pressure distribution on a wing
Another neat experiment in the collection I’ve recently been talking about is measuring pressure at different points on a wing profile. It’s not terribly surprising that – as long as…
Playing with Venturi tubes II
On Monday I posted about playing with Venturi tubes. Guess what: We are going to play more today! Because today the Venturi tubes are connected to a “proper” manometer: Now,…
Playing with Venturi tubes
A Venturi tube is one of the things one hears about in hydrodynamics class all the time, but one never gets to see them for real. And even though I…
Flow direction reversing downstream of obstacle
One of the things that fascinated me most when playing with the huge fan we used to look at the flow downstream of a paddle was how the flow direction reverses.…
Visualizing flow around a paddle
Whenever I’m in a canoe or kayak, I love watching the two eddies that form behind the paddle when you pull it through the water. It looks kinda like this:…