Time series using command line

For the examples here, simply copy and paste the command line in your shell, working in the directory where the StagYY par file is located. You can also use the examples on the data available in the Examples directory.

The command

shell

stagpy time

will give you by default one figure with two subplots. The first subplot contains the time series of the Nusselt number at the top and bottom boundaries, with a check of the energy balance. The corresponding line should be zero at all times for a perfect balance. The second subplot contains the time series of the mean temperature. This is equivalent to typing

shell

stagpy time -o Nubot,Nutop,ebalance.vrms

The command

shell

stagpy time --tstart 0.02 --tend 0.03

will give you the same plots but starting at time 0.02 and ending at time 0.03.

shell

stagpy time -o vrms-Tmin,Tmean,Tmax.dTdt

creates two figures. The first one contains the time series of the rms velocity. The second one contains two subplots, the first one with the time series of the minimal, maximal and average temperature; the second one with the time derivative of the mean temperature. The variable names can be found by running the stagpy var command. The variables you want on the same subplot are separated by commas ,, the variables you want on different subplots are separated by dots ., and the variables you want on different figures are separated by dashes -.

shell

stagpy time +compstat --tstart 0.02

will create a file containing the average and standard deviation of the time series variables from t=0.02 to the end. This is useful when your system has reached a statistical steady state.