Gustav Vasa, a big fruit and turbulent scales

You might remember that I started to eat more fruits than sweets. How that worked out, you might wonder. It worked quite well, until yesterday, where we went to LIDL to by food and sweets. Since it is free to go by bus when having a buggy with you we explored some places in Stockholm (from Stockholm University to Odenplan) and landed in front of the Gustav Vasa Church (picture on the left below).

vasawhat

To make up for the sweets I bought what I have bought last time (right picture above). I asked the salesperson what it is, he said something, but I forgot the name again. It tastes similar to a grapefruit, but is slightly different and much bigger. Any idea?

PS: Recently I found the following book entitled Microscales of Turbulence: heat and mass transfer correlations, by Arpaci, V. S.. (Is it correct to have two dots in the end of this sentence? Or is one sufficient? The first denotes that S is a abbreviation for Sedat and the second one indicates the end of the sentence, but two dots in a row look somehow strange?) Why I mention this book? I think it has a nice way of introducing scales of turbulence, i.e. the integral scale, the Taylor scale and the Kolmogorov microscale. Nothing special or new, it can be found in almost any book on turbulence, but somehow the author introduced them in a very illustrative and simple way. And after years of overflying or reading turbulence books I think I understood something and it all made sense. I can’t judge the rest of the book, but at least one drop in the ocean makes sense and that is enough.

Taken from Prof. Davidhazy‘s homepage.

Looking at that beautiful image, however, shows that there is so much more to explore in regard of impinging droplets on a free-surface.

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