Numerical investigation of chaotic mixing in gas stirred steel ladles (Note)

摘要

A numerical modelling exercise has been carried out to investigate the possible presence of chaotic mixing in the flow field of a gas stirred ladle system. This is accomplished by numerical simulation of the transient fluid flow in the ladle along with the study of composition distribution of tracer particles and the trajectory of fluid particles in the flow domain. Different aspects of chaotic advection pertaining to an industrial mixing process have been discussed. As a quantitative measure of chaos, Lyapunov exponent is calculated. The results, for the first time indicates the chaotic behaviour of mixing pattern in gas stirred ladle system.