
StroboscopyStroboscopic acquisitions on D20 were used for rheologic investigations of orientation of flat or rod like particles (clays, hematite), suspended in water, at laminar flow, turbulent flow and with a shear gradient. They effected dynamic studies at start and stop of flow in pipe flow geometry using a tube where the pumping direction changed every 10 s. In order to study the dynamics of disordering and realigning of Ni(OH)_{2} platelets after flow reversal, every second of the latter served as synchronisation signal for a cycle of 20 s containing 54 slices of 390 ms. After 17 cycles (6 min) the accumulated counting rate was sufficient to show the dynamic behaviour. Ref.: Brown A.B.D., Rennie A.R.  Monodisperse colloidal plates under shear, Physical Review E 62, 851862 (2000) 
