Experimental study of turbulence effect on re-aeration

摘要

It is proposed that the oxygen fluxes caused by molecular and turbulent diffusion should be studied separately. Based on turbulent re-aeration experiments, a quantitative relationship between interfacial mass transfer coef- ficient and interfacial kinetic energy is developed. It not only simplifies the formula of re-aeration coefficient, but also gives fully consideration to the effect of interfacial kinetic energy on re-aeration. It is of great importance for predicting dissolved oxygen distribution and studying the effect of hydrodynamic characteristics on turbulent re-aeration processes.