INVESTIGATION OF THE VELOCITY FIELD IN THE WAVE RIVULET FLOWING DOWN THE VERTICAL PLATE

Joint measurements of thickness and fluid velocity in wavy rivulets were performed using PIV and LIF methods. The stagnant regions in which fluid moves with the velocity of the waves were found under the humps of low-frequency highamplitude waves. The profiles of longitudinal velocity of the fluid were reconstructed for different regions of the waves. These profiles greatly deviate from self-similar parabolic profiles in the stagnant regions and in the regions of capillary precursor of the waves.

Keywords:
rivulet flow, regular waves, laser-induced fluorescence, velocity field. 
УДК 532.62:532.59

INVESTIGATION OF THE VELOCITY FIELD IN THE WAVE RIVULET FLOWING DOWN THE VERTICAL PLATE