Laboratory studies were conducted in a cube-shaped reactor with the aim of generating and controlling homogeneous turbulence near the wall, with zero mean primary flow and minimal mean secondary flow motions, to achieve a homogeneous electrodeposition process. Turbulence was generated by a jet array, divided into 4 sectors consisting of 16 jets each. Two-dimensional Laser Doppler Velocimetry measurements showed that a high turbulence level can be achieved but that the flow is dominated by steady mean motions on the scale of the tank size. Random activation of the four sectors using an appropriate timing can strongly improve the turbulence conditions compared with continuous activation of the four jet sectors. Random activation leads to suppression of steady mean motions and RMS values increase of 100%.
Experiments in Fluids – Springer Journals
Published: Feb 7, 2009
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