Changes between Version 38 and Version 39 of Tutorial/ParticleImageVelocimetry


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Timestamp:
Jan 27, 2015, 2:56:20 PM (6 years ago)
Author:
vaillant1p
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  • Tutorial/ParticleImageVelocimetry

    v38 v39  
    3636Vector color can also  represent another quantity, as chosen in the menu '''[!ColorScalar] ''' in the frame '''[Vectors]'''. For instance the vector length 'norm(U,V)' can be used. Then a color continuous 64 color code is appropriate, as set in the menu '''[!ColorCode]'''. The color code extrema are set by '''[num_!MinVec] ''' and '''[num_MaxVec]''', choose for instance 0 and 5 respectively.'''''''''''
    3737
    38 == Derived fields ==
     38== Scalar maps ==
    3939Other field representations are available, selected in the menu '''[Fields]''' at the top of the GUI. For instance the option 'U' provides a (false) color map of the x wise velocity component. The color code can be adjusted by the edit box '''[num_MinA] ''' (saturated blue color below this value) and '''[num_MaxA]''' (saturated red color beyond this value). Choose for instance -1 and 5 respectively.
    4040
     
    4343[[Image(contours.JPG)]]
    4444
    45 To get the vorticity field, 'vort' , and other spatial derivatives, you need to come back to the GUI''' series''' with images as input and action civ_series'''. '''In''' civ_input''', select the check boxes '''[FIX1] ''' and  '''[PATCH1] ''' , validate the input with '''[OK]''', then press '''[RUN]''' in the GUI '''series'''. A question box appears to warn about the existence of the result file, answer '''[OK]''' to refresh it with the new data. This will produce an interpolated velocity field and their spatial derivatives in the same netcdf file.  After this operation vorticity can be visualized in the GUI  '''uvmat''', selecting the option 'vort'''' ''' in the popup  menu '''[!FieldName]'''.
     45== Spatial derivatives ==
     46
     47To get the vorticity field, 'vort' , and other spatial derivatives, you need to come back to the GUI''' series''' with images as input and action civ_series'''. '''In''' civ_input''', select the check boxes '''[FIX1] ''' and  '''[PATCH1] ''' , validate the input with '''[OK]''', then press '''[RUN]''' in the GUI '''series'''. A question box appears to warn about the existence of the result file, answer '''[OK]''' to refresh it with the new data. Otherwise the results are stored in a new subdirectory with extension ''.civ1'', so the previous results are not erased (you can modify this extension by editing the boxe '''[OutputDirExt]''' in the GUI '''series'''.
     48
     49This will produce an interpolated velocity field and their spatial derivatives in the same netcdf file.  After this operation vorticity can be visualized in the GUI  '''uvmat''', selecting the option 'vort'''' ''' in the popup  menu '''[!FieldName]'''.
    4650
    4751== Superposing image and vectors ==