RELATION OF DEPOSITION TO DROP SIZE WHEN THE RATE LAW IS NONLINEAR

Measurements of drop size distributions have been obtained by photogra phy for air-water annular flow in a 4.2 cm vertical pipe. Results are presented for a constant superficial gas velocity (36 m/s) for differe nt liquid flows. It is shown that droplet deposition rates can be inte rpreted by relating the deposition constant directly to the root-mean square of the velocity fluctuations of the drops. The observed decreas e of the deposition constant with increasing liquid flow cannot be exp lained by an increase in drop size. It is suggested that droplet-dropl et interactions cause a decrease in drop turbulence. Copyright (C) 199 6 Elsevier Science Ltd.