Changes between Version 39 and Version 40 of Tutorial/AdvancedParticleImagingVelocimetry2


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Timestamp:
Jan 20, 2015, 3:39:54 PM (6 years ago)
Author:
vaillant1p
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  • Tutorial/AdvancedParticleImagingVelocimetry2

    v39 v40  
    4242
    4343= Merging data on a common grid =
    44 Create a projection grid in phys coordinates. For that purpose, open a velocity field of Dalsa1.sback.civ_bulk with uvmat, displayed in phys coordinates. Use the upper bar menu option '''Projection object/plane'''. Then in the GUI '''set_object''', choose the option '''!ProjMode=interp_lin'''. Choose a mesh 0.1 cm in each direction, ranging from 0 to 58.8 in x and 0 to 55 in y. Press '''[REFRESH]''' to see the result of projection in the GUI '''view_field'''. Check the option '''nb_vec/4''' in '''view_field''' to reduce the number of vectors displayed on the plot.
     44Create a projection grid in phys coordinates. For that purpose, open a velocity field of Dalsa1.sback.civ_bulk with uvmat, displayed in phys coordinates. Use the upper bar menu option '''Projection object/plane'''. Then in the GUI '''set_object''', choose the option '''[!ProjMode]=''''interp_lin'. Choose a mesh 0.1 cm in each direction, ranging from 0 to 58.8 in x and 0 to 55 in y. Press '''[REFRESH]''' to see the result of projection in the GUI '''view_field'''. Check the option '''nb_vec/4''' in '''view_field''' to reduce the number of vectors displayed on the plot.
    4545
    46 Now in '''series''' open the PIV file ''Dalsa1.sback.civ_bulk'' as input. Then append the second file ''Dalsa1.sback.civ_plume'' using the menu bar selection '''!Open/Browse append...'''.
    47 
    48 Set '''!FieldTransform''' to 'phys', and select '''Projection Object'''. The plane for projection is then incorporated in '''series'''.
    49 
    50 It is also advised to introduce masks in the interpolation process so that each field is interpolated in its range of validity. This is done by selecting the option '''Mask'''. Use the browser to fill the table of masks, in accordance with the table of input file series.
     46Now in '''series''' open the PIV file ''Dalsa1.sback.civ_bulk'' as input. Then append the second file ''Dalsa1.sback.civ_plume'' using the menu bar selection '''!Open/Browse append...'''. Select '''[[wiki:ActionName !ActionName]]'''= 'merge_proj'. Set '''!FieldTransform''' to 'phys', and select the check box '''Projection Object'''. The plane for projection is then incorporated in '''series'''. It is also advised to introduce masks in the interpolation process so that each field is interpolated in its range of validity. This is done by selecting the check box '''Mask'''. Use the browser to fill the table of masks, in accordance with the table of input file series. Press '''[RUN]''' to launch the calculation. Then press '''[STATUS]''' to see the result with '''uvmat'''.
    5147
    5248= Merging data using thin plate shell =
    53 The previously used linear interpolation does not provide field derivatives. For that purpose, we proceed as previouisly but use the option '''!ProjMode=interp_tps''' for the projection plane in '''set_object'''.
     49The previously used linear interpolation does not provide field derivatives. For that purpose, we proceed as previouisly but use the option '''[!ProjMode]=''''interp_tps' for the projection plane in '''set_object'''.
    5450
    55 In the GUI '''series''', select simultaneously the fields vec(U,V), curl(U,V) and div(U,V) to get the vorticity and divergence in addition to velocity. The calculation is significantly longer that for interp_lin, so in the demo we use a resolution DX=DY=0.2 cm for the projection plane (instead of 0.1 cm).
     51In the GUI '''series''', select simultaneously the fields 'vec(U,V)', 'curl(U,V)' and 'div(U,V)' to get the vorticity and divergence in addition to velocity. The calculation is significantly longer that for 'interp_lin', so in the demo we use a resolution DX=DY=0.2 cm for the projection plane (instead of 0.1 cm).
    5652
    5753Open the resulting files with uvmat. Select a vector (components U, V) or a scalar curl or div to visualize the different fields.