EXPERIMENTAL-STUDY OF THE FLOW IN THE CAVITY BETWEEN ROTATING-DISKS

An experimental investigation using laser-Doppler anemometry was condu cted in the cavity between rotating disks. Measurements of velocity we re taken for rotor-stator and counterrotating disk flows. Batchelor-ty pe flow was observed for the rotor-stator flow, and Stewartson-type fl ow in the counterrotating disk system. The core flow of the counterrot ating disks is turbulent for x(2) Re-phi as low as 2.16 X 10(4), but t he boundary layer how remains laminar for x(2) Re-phi less than or equ al to 1.1 X 10(5). The velocity measurements show good agreement with previously published hot-wire anemometry measurements and theoretical predictions.