They'll be covered in the Field Reports in https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/flu_ug/flu_ug_fvdefs.html
Basically, you have the data on the particles and the cell data. The cell data will be calculated from however many parcels are in that cell, whereas the particle data is in the Lagrangian reference frame.
You are navigating away from the AIS Discovery experience