Changes between Version 32 and Version 33 of Tutorial/ParticleImageVelocimetry


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Timestamp:
Jan 23, 2015, 1:54:23 PM (6 years ago)
Author:
vaillant1p
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  • Tutorial/ParticleImageVelocimetry

    v32 v33  
    22
    33= [wiki:Tutorial] / Particle Image Velocimetry =
    4 Open again the first example of image pair in UVMAT_DEMO01_pair. (accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/).
     4Open again the first example of image pair in UVMAT_DEMO01_pair (accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/).
    55
    66= Starting PIV =
     
    1313The PIV computation is accessed from uvmat by the upper bar command '''[Run/PIV]''', or from '''series''' by selecting the function '''civ_series'''. The name 'CIV' means '''C'''orrelation '''I'''maging '''V'''elocity to stress that the method relies on image correlation, which evaluates the displacement of image textures, not necessarily from particles. Note that an older GUI ''''civ'''' is also available, but it is obsolete and not used here.
    1414
    15 A new GUI '''civ_input''' now appears. In the menu '''[!ListCompareMode]''', keep the default option 'PIV'. Keep also the default option 'Di=0|1' for the image pair (menu tag '''[!ListPairCiv1]'''). Keep also the default parameters in the frame '''CIV1''' and press '''OK''', so the GUI '''civ_input''' desappears.  Then press '''[RUN] ''' in the GUI''' series''' to run the calculation. The button '''[RUN]''' is then colored to yellow until the computation is finished.
     15A new GUI '''civ_input''' now appears. In the menu '''[!ListCompareMode]''', keep the default option 'PIV'. Keep also the default option 'Di=0|1' for the image pair (menu tag '''[!ListPairCiv1]'''). Keep also the default parameters in the frame '''CIV1''' and press '''[OK]''', so the GUI '''civ_input''' desappears.  Then press '''[RUN] ''' in the GUI''' series''' to run the calculation. The button '''[RUN]''' is then colored to yellow until the computation is finished.
    1616
    1717The operation produces a  file with format netcdf, named with extension '''.nc''', in a folder called ''Images.civ''. This can be viewed by pressing '''[STATUS] '''in the GUI '''series''', which displays the result file ''frame_1-2.nc''. The index string '_1-2' indicates that it results from images 1 and 2. Select the file name and press '''[OPEN]''' to open it directly with '''uvmat''', or use the browser of '''uvmat'''.