长江科学院院报2019，Vol.36Issue(1)：68-73,6.DOI:10.11988/ckyyb.20170750
平口管口处气泡行为特征数值模拟
Numerical Simulation on Bubble Behavior at Nozzle of Vertical Flat Pipe
摘要
Abstract
VOF (Volume of Fluid) model is employed to study the behavior of single bubble at nozzle of vertical flat pipe. The process of bubble expansion and detachment is simulated, and the influences of immersion mode, nozzle diameter, gas velocity, liquid density, and surface tension on bubble expansion detachment time and detachment diameter are comparatively analyzed. Results demonstrate that the bubble expansion and detachment time shortens with the increase of gas velocity at the nozzle, and then tends to be gentle gradually under three different nozzle im-mersion modes. In the bottom-immersion and top-immersion mode, the bubble expansion detachment time and de-tachment diameter both increase with the growth of surface tension, while decline with the climbing of liquid densi-ty. In the side-immersion mode, the bubble expansion detachment time and detachment diameter both increase with the growth of surface tension, whereas the effect of liquid density is subtle. There is a positive correlation between the bubble expansion and detachment time and the bubble detachment diameter. The established mathematical mod-el offers an effective research approach by simulating the formation and motion of bubbles truly.关键词
气液两相流/平口管口/VOF/气泡/浸没方式Key words
gas-liquid two-phase flow/nozzle of vertical flat pipe/VOF/bubble/immersion mode分类
建筑与水利引用本文复制引用
吴晅,李松洋,马骏,秦梦竹,金光..平口管口处气泡行为特征数值模拟[J].长江科学院院报,2019,36(1):68-73,6.基金项目
河北省自然科学基金项目(E2015209260) （E2015209260）
河北省钢铁冶金联合研究基金项目(E2018209351) （E2018209351）
河北省高等学校科学技术研究重点项目( ZD2017060) （ ZD2017060）
