摘要
为研究水中气泡上升的动力学特性,采用数值模拟方法,以静止水中的单气泡为研究对象,应用CFD分析软件,建立了气泡在浮力和重力作用下的仿真模型。模拟区域考虑了静水压力梯度场,采用无滑移技术处理流场边界及全结构网格技术处理气泡,对直径为2.6 mm和4 mm的气泡进行了数值模拟。分析了气泡在水中的运动机理,并将数值计算与实验数据进行了对比。结果表明:气泡在水中的上升路径与上升速度与试验结果吻合良好,此方法为利用数值手段研究水中气泡的运动特性提供了一个有效的解决途径。
To study the dynamic properties of bubble rising in the water, a simulation model of single bubble under buoyancy and gravity in still water was established by CFD software. Taking hydrostatic pressure gradient into consideration, the no-slip technology was applied to deal with the boundary of flow field, and the whole structured grid technology was used to deal with the bubble and still water area. Using this model, bubbles of 2.6 mm and 4mm diameters were simulated to analyze the movement mechanism of the bubbles in still water. The numerical results were further compared with the test data. The rising route and velocity were well consistent with the test data. The approach in this study offered an effective solution to investigate the dynamic properties of bubble in water.
出处
《长江科学院院报》
CSCD
北大核心
2011年第9期18-20,29,共4页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金(50579085)
关键词
气泡
数值模拟
运动机理
bubble
numerical simulation
movement mechanism
