[1]曹海亮,安 琪,左潜龙,等.一种新的固液共轭沸腾传热LB模型[J].郑州大学学报(工学版),2023,44(02):75-81.[doi:10.13705/j.issn.1671-6833.2022.05.016]
 CAO Hailiang,AN Qi,ZUO Qianlong,et al.A New LB Model for Solid-liquid Conjugate Boiling Heat Transfer[J].Journal of Zhengzhou University (Engineering Science),2023,44(02):75-81.[doi:10.13705/j.issn.1671-6833.2022.05.016]
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一种新的固液共轭沸腾传热LB模型()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
44卷
期数:
2023年02期
页码:
75-81
栏目:
出版日期:
2023-02-27

文章信息/Info

Title:
A New LB Model for Solid-liquid Conjugate Boiling Heat Transfer
作者:
曹海亮 安 琪 左潜龙 刘红贝 张子阳 赵晓亮 王培萍
郑州大学 机械与动力工程学院,河南 郑州 450001

Author(s):
CAO Hailiang AN Qi ZUO Qianlong LIU Hongbei ZHANG Ziyang ZHAO Xiaoliang WANG Peiping
School of Mechanical and Power Engineering, Zhengzhou University, 450001, Zhengzhou, Henan

关键词:
相变 共轭传热模型 汽液两相流 气泡 LBM
Keywords:
phase change solid-liquid conjugate boiling heat transfer model gas-liquid flow bubble LBM
DOI:
10.13705/j.issn.1671-6833.2022.05.016
文献标志码:
A
摘要:
为了避免沸腾传热格子玻尔兹曼( lattice Boltzmann,LB) 模型中因固液能量传递速率一致而导 致的模拟误差,尝试性地将固体和液体的物性参数 λ、c p 引入温度弛豫时间 τ T ,成功获得了不同的能量 传递速率,得到了一种新的固液共轭沸腾传热格子玻尔兹曼伪势模型。 在验证了模型的准确性、稳定性 和合理性后,采用固液共轭传热模型和原始伪势模型对不同润湿性表面的沸腾传热过程进行了数值模 拟。 结果表明:由于原始伪势模型忽视了固、液区域不同的传热能力,导致计算获得的气泡根部周围存 在范围较大的低密度相变区,该区域的存在对气泡产生了额外相间作用力,大大改变了气泡的壁面接触 角。 而共轭传热模型通过引入温度弛豫时间函数实现了对固体和液体区域不同的热物理性质的表征, 获得的低密度相变区范围很小,程度更低,壁面接触角更接近于设置的气泡接触角。 除超亲水表面外的 其它润湿性表面,共轭传热模型获得的实际接触角的最大相对误差为 8. 6%,较原始伪势模型降低了 9. 8%,更能准确地描述实际的沸腾换热微观过程。
Abstract:
To avoid the simulation error caused by the consistent solid-liquid energy transfer rate in the boiling heat transfer LB( lattice Boltzmann) model, different energy transfer rates of solid and liquid are successfully distinguished by tentatively introducing the physical parameters λ, cp of solid and liquid into the temperature relaxation time τ T , as a result, a novel solid-liquid conjugate boiling heat transfer LB model is proposed in this paper. After verifying the accuracy, stability and rationality of the model, boiling heat transfer at different wettability surfaces are simulated by the solid-liquid conjugate model and the original pseudo-potential model. The results show that the unintentional neglection of different heat transfer capacities of solid and liquid regions in the original pseudo-potential model leads to the appearance of large low-density phase transition region around the bubble root. The existence of low-density phase transition region produces additional interphase forces and greatly changes the wall contact angle of bubbles. However, the solid-liquid conjugate heat conduction model realized characterization of different thermophysical properties of solid and liquid regions by introducing a temperature relaxation time function. The low-density phase transition region only appears in a very small range and at very low level, the actual bubble wall contact angles obtained by the conjugate heat transfer model are closer to the setting bubble contact angle. For other wettable surfaces except superhydrophilic surfaces, the maximum relative error of the actual contact angle obtained by the conjugate heat transfer model is 8. 6%, which is 9. 8% lower than that of the original pseudopotential model. The solid-liquid conjugate boiling heat transfer LB model can more accurately describe the actual microscopic process of boiling heat transfer.
更新日期/Last Update: 2023-02-25