Numerical Simulation of Rising Bubble Behavior in Sloshing Condition
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摘要: 海洋条件中风浪等因素会导致船舶上存在自由液面的容器产生剧烈的晃荡运动。为了分析晃荡条件下液体中的气泡行为特性,在计算流体动力学软件Fluent平台下运用流体体积函数法模型,对晃荡条件下气泡在液体中的上升过程进行数值模拟。计算结果显示,晃荡条件下气泡呈周期性摆动上升,并伴随着聚合与分离现象。分析表明,晃荡对气泡运动行为特性产生的影响不可忽视,剧烈的晃荡运动会影响气泡的脱离尺寸,在加速部分气泡分离的同时阻碍部分气泡的运动而导致气泡聚合;晃荡运动还会致使气泡在水平方向偏离比较大的位移。Abstract: The storm and other factors under the ocean conditions could cause the container which exist the free surface on the ship produced the intense sloshing motion.In order to analyze the rising bubble behavior in the liquid under the sloshing conditions.This paper uses the VOF（Volume of Fluid） model to simulate the rising bubbles in the liquid at the fluent platform.Calculation results show that the bubble can cyclical swing up and accompany by aggregation and separation when it is in sloshing conditions.The results also show that the violent sloshing motion can affect the bubble’s departure size,and accelerate the rise of bubbles which along with generating the separation bubbles,it can also hinder the movement of the bubble which can produce the aggregation phenomena,and the bubble will be deviated relatively large displacements in the horizontal direction,it cannot be ignored that the sloshing motion can make a serious impact to the behavioral characteristics of bubbles.
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Key words:
- Rising bubble /
- Sloshing /
- VOF
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