Set this parameter to
YES to activate the follow up of a passive scalar (label). At each output, in addition to the density and velocity files, a file named
gaslabel[i].dat is then written in the output directory. The passive scalar is initially set to (r-
Rmin), i.e. it is 0 at the inner boundary, 1 at the outer boundary, and it is an affine function of r. If you want to initialize it otherwise, edit the function
InitLabel, in the file
Note: The label advection has a slight computational cost ( 10%).