中南大学学报(英文版)
中南大學學報(英文版)
중남대학학보(영문판)
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY(ENGLISH EDITION)
2015年
6期
2385-2392
,共8页
沈政昌%陈建华%张谌虎%廖幸锦%李玉琼
瀋政昌%陳建華%張諶虎%廖倖錦%李玉瓊
침정창%진건화%장심호%료행금%리옥경
computational fluid dynamics (CFD) simulation%flotation cell%gas-liquid two-phases flow
According to the recently developed single-trough floating machine with the world’s largest volume (inflatable mechanical agitation flotation machine with volume of 320 m3) in China, the gas-fluid two-phase flow in flotation cell was simulated using computational fluid dynamics method. It is shown that hexahedral mesh scheme is more suitable for the complex structure of the flotation cell than tetrahedral mesh scheme, and a mesh quality ranging from 0.7 to 1.0 is obtained. Comparative studies of the standardk?ε,k?ω and realizablek?ε turbulence models were carried out. It is indicated that the standardk?ε turbulence model could give a result relatively close to the practice and the liquid phase flow field is well characterized. In addition, two obvious recirculation zones are formed in the mixing zones, and the pressure on the rotor and stator is well characterized. Furthermore, the simulation results using improved standardk?εturbulence model show that surface tension coefficient of 0.072, drag model of Grace and coefficient of 4, and lift coefficient of 0.001 can be achieved. The research results suggest that gas-fluid two-phase flow in large flotation cell can be well simulated using computational fluid dynamics method.