Home > Legacy archive > User’s manual > Parameters > LabelAdvection

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)/(Rmax-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 src/Init.c.

Note: The label advection has a slight computational cost ( 10%).

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