OpenPIV is now downloadable from Softpedia – largest provider of the multi-platform software
Posted by: Alex Liberzon on: October 31, 2009
New Matlab version (Sep. 2009) has been released.
Posted by: Alex Liberzon on: September 24, 2009
The direct download link is below:
Of course one could use the website and the link from there:
or using the SVN server to get the /Matlab/trunk
svn co https://openpiv.svn.sourceforge.net/svnroot/openpiv openpiv
The snapshot of the new version looks like the previous ones, but there are few bugs fixed:
a. RGB TIFF images are readable now, using Matlab’s rgb2gray function
b. tiffread2.m file is included for the other TIFF file formats. Thanks to the authors (read inside the license information)
New Matlab version screencast
Posted by: Alex Liberzon on: August 12, 2009
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Matlab version of OpenPIV has now new features
Posted by: Alex Liberzon on: August 11, 2009
http://matlabpiv.svn.sourceforge.net/viewvc/matlabpiv?view=rev&revision=24
Update from SVN (see the wiki for the instructions) openpiv.wiki.sourceforge.net
Basically it’s a merged /trunk and /branches/Dec2007 versions
New features:
- rectangular interrogation windows and different spacing in horizontal/vertical directions
- Stop button works
- faster interpolation of missing values – replaced by the great inpaint_nans of John D’Errico (see Matlab central for more details, BSF licensed)
Matlab version is updated
Posted by: Alex Liberzon on: August 10, 2009
Finally, after a long break, I updated few things in our Matlab version (with GUI):
- logo
- File/Load instead of the ugly ‘edit_dir’
- speed improved as unnecessary calls to urapiv2 removed
- finally, STOP is working 
- added two PIV images to the /images directory to get quick try-and-install feeling (those are the courtesy of Dr. Roi Gurka)
Now it’s about time to update the new WIKI, which is due to Sourceforge.net policy moved to TRAC.
https://sourceforge.net/apps/trac/openpiv/wiki/WikiStart
new snapshots will appear soon
Two options to process OpenPIV results
Posted by: Alex Liberzon on: July 26, 2009
SourceForge.net: openpiv » Post-processing options
How to read and process OpenPIV files , small tutorial and Matlab function that converts OpenPIV TXT files into PIVMAT -compatible structure. Now on our wiki >>>
Not the best looking example
our monthly snapshot – 2D turbulence experiment
Posted by: Alex Liberzon on: July 23, 2009
SourceForge.net: openpiv » Getting Started with PyPIV
Posted by: Alex Liberzon on: June 4, 2009
SourceForge.net: openpiv » Getting Started with PyPIV
http://openpiv.wiki.sourceforge.net/Getting+Started+with+PyPIV
New wiki page that gives an introductory overview of our (unfortunately still in alpha version) Python version that uses NumPy/SciPy/Matplotlib/ (thanks to all the developers from http://www.scipy.org and Matplotlib)
OpenPIV is helping Canadian Centenial of Flight
Posted by: Alex Liberzon on: May 27, 2009
Canada celebrates 100 year of powered flight in 2009
1909 was the year of the first powered flight on the Silver Dart flies nearly 800 metres in Baddeck, NS, marking Canada’s first powered, heavier than air flight:
In 2–8-2009 a full size replica of the Silver Dart was built and the replica was actually flying in Baddeck, NS,
controlled by retired astronaut Bjarni Tryggvason who’s also an adjunct professor at the University of Western Ontario, London, CA.
The top right photo shows the stabilizer of the replica – the main thing that has to be precisely designed. What is most necessary is it’s aerodynamic properties: separation points at different angles of attack, etc. How one can do it? Use the Boundary Layer Wind Tunnel Laboratory (BLWTL) and measure the flow around the wing using Particle Image Velocimetry.
The wing in the wind tunnel:
The two PIV images:
and the result:
We can see that at this given angle of attack there is a circulation bubble (strong colors) on the right side (leading edge) and apparent separation right after the reattachment point.
The images were taken by Adam Kirchhefer, BLWTL, provided by Dr. Roi Gurka (UWO, BGU) and analysed using OpenPIV (the URAPIV-XP version of Zachary Taylor, BLWTL) by Alex Liberzon, TAU.
We need the leader with some experience running open source
Posted by: Alex Liberzon on: May 15, 2009
We read the short essay by Ondřej Čertík: My experience with running an opensource project
and understand that most of the things we miss. Please, help us to raise OpenPIV to the level of SymPy or PyMCA or something of that level.
We invite all our colleagues to join OpenPIV - http://www.openpiv.net – could combine MATPIV, GPIV, CIV, and so on, even PIVMAT and our old TFAM package (look on sourceforge)
