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首页> 外文会议>International conference on nuclear engineering >A NUMERICAL SIMULATION ON EFFECTS OF DISTANCE BETWEEN BUBBLE AND THE WALL ON BEHAVIOR OF RISING BUBBLE
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A NUMERICAL SIMULATION ON EFFECTS OF DISTANCE BETWEEN BUBBLE AND THE WALL ON BEHAVIOR OF RISING BUBBLE

机译：气泡与壁之间的距离对上升气泡行为影响的数值模拟

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摘要

A numerical investigation of two-dimensional air bubble behaviors under the effect of gravity in still water based on the VOF (Volume-Of-Fluid) method is carried out. Initially, the surface tension effects on the behavior of the bubble is analyzed, which contains the simulation of the ascending motion of a single air bubble in liquid and the study of the interaction between bubbles in terms of coalescence. Additionally, the differences of single bubble's rising motion in an infinite surroundings and in a vertical narrow channel are analyzed. The coalescence of bubbles is also studied. The motion of bubbles with different diameters in a vertical channel is simulated. It is found that the bubbles' behavior depends on the distance between the bubble and the wall. Finally, numerical simulation of the motion of several bubbles of the same size, at the same initial horizontal position and with uniform distribution is carried out. The result reveals that the bubbles at different distances from the wall have different velocities, after a while, the bubbles distribution presents as "U".
机译：基于VOF（Volume-Of-Fluid，液体量）方法，对静止水中重力作用下的二维气泡行为进行了数值研究。最初，分析了表面张力对气泡行为的影响，其中包括模拟单个气泡在液体中的上升运动，并研究了聚结方面气泡之间的相互作用。此外，分析了无限大环境和垂直狭窄通道中单个气泡上升运动的差异。还研究了气泡的聚结。模拟了不同直径的气泡在垂直通道中的运动。发现气泡的行为取决于气泡和壁之间的距离。最后，对相同大小，相同初始水平位置且分布均匀的几个气泡的运动进行了数值模拟。结果表明，距壁不同距离的气泡具有不同的速度，一段时间后，气泡分布呈现为“ U”形。

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