Mass transfer into turbulent jets

Abstract

The absorption of CO2 and H2 into turbulent jets of water at Re up to 22,000 increases with Re in close accord with the Levich theory of eddy behaviour at an interface. In contrast to absorption into laminar jets, the mean concentration of gas absorbed into a turbulent jet increases with the flow rate. Mass transfer coefficients as high as 0·1 cm sec-1 were found for CO2 and up to 0·17 for H2. Results for the two gases showed that even in highly turbulent jets, kL remains closely proportional to the square root of the diffusion coefficient. The numbers and frequencies (observed photographically) of the turbulence eddies on the surfaces of the jets do not correlate in any simple way with the mass transfer coefficients. © 1967.