微结构泡柱的欧勒-拉格朗日模拟使用新型切割模型
Rahul Subburaj1, Yali Tang1,2, Niels G Deen1,2
1Power and Flow Group, Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
概括
这项研究验证了微结构泡柱中泡切割的模型,改善了反应堆性能和气体保持率的预测. 经过验证的模型增强了对泡动态和钢丝网设计的理解,以增加接口面积.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 流体动力学 流体动力学
- 反应工程的反应工程.
背景情况:
- 微结构泡柱反应器使用催化剂涂层网格,通过切割泡来增强接口面积和水力动力学.
- 之前的工作建立了一个基于能量平衡的气泡线网相互作用的闭合模型.
研究的目的:
- 通过欧勒-拉格朗奇模拟,验证微结构泡柱中泡切割开发的闭合模型.
- 改进虚拟质量计算的减速厚度定义,包括液体粘度和线材厚度.
主要方法:
- 用欧勒-拉格朗奇模拟来验证气泡切割闭合模型与实验数据的对比.
- 通过将预测的气泡大小减少,pH值和气体保持与实验结果进行比较来评估模型的准确性.
主要成果:
- 经过验证的切割关闭模型准确地预测了电网的气泡大小减少,与实验数据相匹配.
- 纳入该模型的模拟提供了更准确的反应堆性能预测,包括pH和气体持久度.
- 该模型准确地复制了液体粘度对泡大小减少的影响.
结论:
- 经验证的模型增强了对微结构泡柱反应堆性能的预测.
- 气泡切割是重要的,但气泡凝聚和破裂在高气体速度上占主导地位,表明模型改进的领域.
- 经过验证的切割模型为设计丝网提供了洞察力,以最大限度地提高泡接口面积.
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