Open source 3D-PTV software

The Insitute of Environmental Engineering (IFU) and Institute of Geodesy and Photogrammetry (IGP) at the ETH Zurich opens the source of the three-dimensional Particle Tracking Velocimetry (3D-PTV) software for academic use. Everyone can request it by sending an e-mail. URAPIV greets every open science project and especially open source ones. In addition, Alex has opened a Wiki for all PTV users that it is edited collaboratively to promote the code and improve it's documentation. Wiki will have also some more codes for the post-processing, turbulent flow analysis, etc., written for years in C, C++, Matlab. Wiki looks nice and we consider to move URAPIV there too :-). It will allow all our users to edit it's documentation, which is still missing - sorry for that.

MicroPIV in 1932?

Alex just found that in 1932, A. Fage and H.C.H. Townend published an article in Proceedings of the Royal Society of London (Series A), vol. 135, No. 828, pp. 656-677, which is: "An Examination of Turbulent Flow with an Ultramicroscope".

 Are you kidding me :-)?

And were waiting until 1998 to reinvent it as microPIV?

Look at the sketch and tell me if they didn't do also Nano-PIV?

The full article is available through JSTOR: http://www.jstor.org

We are not sure if we are allowed to show here the copy of the figures which are most probably copyrighted, but it is so striking when we see such a thing and it's impossible to express it otherwise. We argue not to copy this images and purchase the original article from JSTOR.  We add the copyright notice as it is provided by JSTOR:

Cross post: Turbulence yields secrets to 73-year-old experiment

A simple but groundbreaking experiment performed more than 70 years ago finally has been explained by scientists at the University of Illinois at Urbana-Champaign. The solution sheds new light on fluid turbulence — the last major unsolved problem in classical physics.

"Turbulence is the jittery, swirling behavior of a gas or liquid when flowing next to a wall or around an obstacle," said Gustavo Gioia, a professor of theoretical and applied mechanics at Illinois. "Although most of the flows that surround us in everyday life are turbulent flows over rough walls, these flows have remained one of the least understood phenomena of classical physics."

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