I have some OpenFOAM simulation results (you may use the official can.ex2 model which can be downloaded from here). What I want to do is:

open a file, load the original data as decomposed case (which can't be applied to the case above) apply a Calculator filter one a specific variable (e.g. DISP*3.14*coordsX , I used 3.14 because for the love of god I can't find Pi!) apply filter plot over line [x1,y1,z1] to [x2,y2,z2] integrate the output of 2 over the line defined in 3 in each time step plot the result of 4 over time

I would appreciate if you could help me know how I can write a Python script to do this.