About

• pvpython postprocessor for bubble dynamics simulations
• Created to process the output of ALPACA bubble simulations
• Compatible with paraview 5.8.0
• Created by Daniel Nagy (Technical University of Budapest, Sonochemistry Research Group)

Versions

2D planar postprocessor 1.8 (postprocessor.py)

• Model: Circular bubbles

2D axisymmetric postprocessor 1.1 (postprocessorAxis.py)

• Model: Axisymmetric bubble (symmetry is the y-axis)

3D postprocessor 1.0 (postprocessor3D.py)

• Model: 3D bubbles

Usage

pvpython postprocessor.py inputfolder outputfolder

• postprocessor.py could be any of the 3 scripts
• inputfolder ALPACA output folder, .xdmf files are searched under inputfolder/domain/*.xdmf
• outputfolder the folder where the output of the postprocessor is saved, data.csv is always saved under outputfolder/data.csv

Optional arguments

• --debug prints debug information
• --savewave pos save the standing wave data (pressure, density, velocity) at the specified position. This generates extra output files (e.g. wavePressureMiddle.csv)
  • top saves the data at the top of the domain
  • middle saves the data at the middle of the domain
  • bottom saves the data at the bottom of the domain
  • all saves the data at all the previous positions
• --savepics saves an image of the bubble in each step, image saved at outputfolder/pics_#step.png
• --pmin val specifies the bottom of the pressure color bar on the saved image (e.g. --pmin 0.5e5 sets the color bar min. to 0.5 bar)
• --pmax val specifies the top of the pressure color bar on the saved image (e.g. --pmax 1.5e5 sets the color bar max. to 1.5 bar)
• --nosavedata does not create the data.csv file (can be used just to save the standing wave)
• --version prints the current version

Output

data.csv

Contains the important bubble quantities for each timestep

• Column 1: step, the actual step number
• Column 2: time, the time instance of the step
• Column 3: bubble pressure
• Column 4: bubble density
• Column 5: bubble volume (model corrigated)
• Column 6: bubble radius (along x axis)
• Column 7: bubble radius (along y axis)
• Column 8: inlet pressure
• Column 9: inlet density
• Column 10: bubble mass (model corrigated)

wave*.csv

Contains the information of the standing wave (e.g. PressureMiddle refers to the pressure wave at the middle of the domain).

• Row 1: sampling positions
• Column 1: sampling time instances
• Row i, Column j: field variable at the i-1th time instance at the j-1th position