水利水电科技进展2024，Vol.44Issue(1)：16-22,7.DOI:10.3880/j.issn.1006-7647.2024.01.003
流体黏性对盐指型双扩散对流扩散通量影响的试验研究
Experimental study on effect of fluid viscosity on salt-finger double diffusion convection flux
摘要
Abstract
In order to study the effect of fluid viscosity on the flux during salt-finger double diffusion convection,an experimental tank with a moving baffle plate in the middle was used.The sugar-salt double-layer system was formed and was initially stationary.The experimental study for double diffusion convection flux was carried out by adjusting the mass fractions of the sugar and salt components to obtain a series of experimental conditions with the same density stability ratio and different fluid viscosities.The experimental results show that the influence of fluid viscosity on the flux of salt-finger double diffusion convection could not be ignored.Under the condition of the same double diffusion convection intensity,the greater the viscosity of the experimental fluids,the smaller the fluxes for the salt-finger double diffusion convection.When the kinematic viscosity coefficients of experimental fluids are less than 1.15 mm2/s,double diffusion convective fluxes of sugar and salt decrease with the increase of the fluid viscosities.When the mass fractions of the two component continue to increase,the viscosity of the salt solution still increases slowly while the viscosity of the sugar solution increases rapidly.The flux of sugar component between the stratified interface still decreases with the increase of the sugar solution viscosity.However,the flux of the salt component does not change.The Stern number is negatively correlated with the viscosity of the fluid.关键词
糖-盐双层系统/双扩散对流/流体黏性/扩散通量/密度稳定比Key words
sugar-salt double-layer system/double diffusion convection/fluid viscosity/diffusion flux/density stability ratio分类
数理科学引用本文复制引用
陈铂,徐孝勤,黄筱云,彭君可,黄剑文..流体黏性对盐指型双扩散对流扩散通量影响的试验研究[J].水利水电科技进展,2024,44(1):16-22,7.基金项目
湖南省自然科学基金项目(2021JJ30704) （2021JJ30704）
长沙市自然科学基金项目(kq2014102) （kq2014102）
湖南省环境保护河湖疏浚污染控制工程技术中心开放基金项目(EPD202101) （EPD202101）
